eChapters

For economical ration -preparation, selection of cheap feed amongthe locally available sources, is an important point to ponder. For this purpose, a list of available feeds is prepared alongwith their latest costs on dry matter basis. The cost per kgof dry matter is divided by the amount of the nutrient (as a decimal), it will give us a good idea of the :

• Cost of Crude Protein in ??Protein supplements and,

• Cost of Energy in ??Energy feeds.

For example, if alpha alpha hay costs Rs 3.93 per kgof dry matter, the cost per kg of Crude Protein = 3.93/0.171 = Rs 22.98 per kg.

In this way, it is possible to prepare a list of protein sources in the order of “Ranking” from which feeds can be selected at lower costs.

Effect of Differences in Dry Matter

Feeds are purchased on the basis of Dry Matter due to variation of moisture content. For example :

A Corn of 89 % Dry Matter costs Rs 7 per kg,

Another type of corn of 75 % Dry Matter can’t be comparable on this cost This can be done as following 

What is Least Square Method?

The Least Squares Method is used to derive a generalized linear equation between two variables, one of which is independent and the other dependent on the former. The value of the independent variable is represented as the x-coordinate and that of the dependent variable is represented as the y-coordinate in a two-dimensional cartesian coordinate system. Initially, known values are marked on a plot. The plot obtained at this point is called a scatter plot. Then, we try to represent all the marked points as a straight line or a linear equation. The equation of such a line is obtained with the help of the least squares method. This is done to get the value of the dependent variable for an independent variable for which the value was initially unknown. This helps us to fill in the missing points in a data table or forecast the data. The method is discussed in detail as follows. The least-squares method was officially discovered and published by Adrien-Marie Legendre (1805), though it is usually also co-credited to Carl Friedrich Gauss (1809), who contributed significant theoretical advances to the method.

Least Square Method Definition

The least-squares method can be defined as a statistical method that is used to find the equation of the line of best fit related to the given data. This method is called so as it aims at reducing the sum of squares of deviations (residual part) as much as possible. The line obtained from such a method is called a regression line.

10.1 Introduction

Least square theory is a statistical technique used to estimate the parameters involved in the regression model in such a way that the sum of squares of errors (residuals) is minimum (least). We have generally two methods of estimation of population parameters. These are (i) Ordinary least square (O.L.S.) method and (ii) Maximum likelihood (M.L.) method. The method of ordinary least square (O.L.S.) is used extensively in regression analysis primarily because it is intutively appealing and mathematically much simpler than the method of maximum likelihood estimation (M.L.E.). In the context of lineaer regression analysis, the two methods generally give similar results.

Goats are used primarily for milk and meat production, but their skin is also a valuable by- product. Goats are an important source of hides and skin . The term hide is used to denote the outer covering of large animals such as cows, buffaloes, horses ,sheep, camel etc. The term “Skin” is applied to that of smaller animals such as sheep, goats , calves etc. Raw hides and skins are used mainly for the manufacture of leather.Goat skin is in great demand for making leather gloves , shoes , luggage, book covers etc.Goat skin was also used in many of the musical instruments .Goat skin has been used since time immemorial as water-containers. The water containers from goat skin were called “Mushk” and the person carrying such containers as “Bhisti”.Pelt is undressed skin of sheep & goats. To prevent putrefication, the skin is treated as well as preserved by dry salting and are graded according to curled type quality of the skin.

The Leather Industry holds a prominent place in the Indian economy. India produces 13.14% of the goat skin production of the world.This sector is known for its consistency in high export earnings and it is among the top ten foreign exchange earners for the country. With an annual turnover of over US$ 7 billion, the export of leather and leather products increased manifold over the past decades and touched US$ 3.40 billion in 2009-10; recording a cumulative annual growth rate of about 5.43% (5 years).It is estimaed that 72.3 million goat skins were produced in India in 2008 (FAOSTAT). India ranks second among the goat skin producing countries of the world, second only to China. India produced 130 thousand tones of goat skin in 2008 ( FAOSTAT) against China producing 351.7 thousand tones and Pakistan 94 thousand tonnes (FAO Stat).

The major production centers for leather and leather products are located in Tamil Nadu - Chennai, Ambur, Ranipet, Vaniyambadi, Trichy, Dindigul ; West Bengal –Kolkata ; Uttar Pradesh –Kanpur, Agra & Noida ; Maharashtra –Mumbai; Punjab –Jallandhar ; Karnataka –Bangalore ; Andhra Pradesh - Hyderabad ; Haryana - Ambala, Gurgaon, Panchkula and Karnal; Delhi. India is the second largest producer of leather footwear and garments in the world.

Leavening agents produce carbon dioxide which helps to give characteristic structure to bread cakes and biscuits etc. In the case of cakes, leavening is produced by air entrapped in the dough due to the presence of egg in the mix. The important groups of leavening agent’s are l. baker’s yeast 2. Chemical leavening agents

Lectins are sugar-binding proteins or glycoprotein of non-immune origin. In 1954 William C. Boyd alone and then together with Elizabeth Shapleigh introduced term ‘lectin’ from the Latin word lego- ‘chosen’ (from the verb legere ‘to choose’ or ‘pick out’).The earliest description of a lectin is believed to have been given by Peter Hermann Stillmark in his doctoral thesis presented in 1888 to the University of Dorpat. Stillmark isolated ricin, an extremely toxic hemagglutinin, from seeds of the castor plant (Ricinus communis).
History
Lectins, although first discovered more than 100 years ago in plants, and defined by their ability to selectively recognize specific carbohydrate structures, are ubiquitous in living organisms and throughout nature. Long before a deeper understanding of their numerous biological functions, the plant lectins, also known as phytohemagglutinins, were noted for their particularly high specificity for foreign HYPERLINK https://en.wikipedia.org/wiki/Glycoconjugate glycoconjugates (e.g. those of fungi, invertebrates, and animals) and used in biomedicine for blood cell testing and in biochemistry for fractionation.
Hundreds of lectins of plant and animal origin have been described, and the list continues to increase. The first lectin to be purified on a large scale and available on a commercial basis was concanavalin A, which is now the mostused lectin for characterization and purification of sugar-containing molecules and cellular structures. The legume lectins are probably the most well-studied lectins.

16.1 INTRODUCTION

The world floriculture business has reached to almost over a $ 40 billion mark. It is continuously going through the rapid transitional changes to have more unique and competitive products of wide choice to the consumers. Netherland is ahead in floriculture trade. Throughout the year, a large number of ornamental commodities are imported in Holland and exported back to the countries for its retail and consumption mostly to the countries in the Gulf, Middle-East Asia and America. According to the statistical estimates worldwide, a large quantity is consumed in US and the other countries. For an example, the US alone consumes 100 lacs of cut flowers a day and approximately 4000 lacs every year, though it ranks only 17^th in per capita cut-flower consumption. The average Swiss spends Rs 4500 a year on flowers, nearly four times than that spent by the average American besides the fact that the consumption of fresh cut flower and foliage plant is on manifold increase every year resulting in the competition worldwide for growing of exportable eco-friendly products. At the same time there is great environmental consciousness towards transforming floriculture with “natural and unspoiled” system of having the exportable produce into a mass and its ease to transport to any distant market. The system relies greatly on the industry with extensive network of breeders, greenhouse managers, field workers, auction houses, sales representatives, shippers, and florists to offer consumers a variety of choices matching their taste. This is the fact that in the recent times, the commercial growers don’t rely on the nature to introduce the genetic mutation that will make them millionaires but depends on the art and scientific knowhow to create a novelty in its own. This has resulted in the seriousness and painstaking effort of the growers to produce the plants in new forms and shape to put forward a new plant with extra-ordinary marketable characteristics every year, e.g. compact chrysanthemum, kalanchoe, bromeliads, orchids, etc (Plate1) are some of the common products with an unusual and eye-catching hue in the European markets. Similarly, the consumers can purchase gerberas with blooms as wide as salad plates and roses with yard-long stems perfectly suited for valentine-day gifts which mainly they get produced under the specific and artificial environment created for a specific growth stages of the plant.

The landscape gardening for aesthetic appreciation is an integral part of the progress achieved through the growing world floriculture business that has reached a $ 40 billion mark and valueless aesthetic emotional gains. The industry is continuously rising through transitional changes to have more accepted and unique applications as a wide and economic choice to the consumers with regards to the energy saving in the system. The use of energy for sustenance of the landscape plants before and after planting can be a benchmark in time to come as no one can believe that the plants instead can grow with still better traits either be it the foliage colour, variegation, shape, size and or form beside the fact that the consumption of such altered/compact plants has increased manifold in house, gardens, parks and indoors with a large number of products worldwide in a eco-friendly manner.

At the same time there is great environmental consciousness towards transforming landscape gardening with more natural and unspoiled system of growing plants and maintaining them in the landscape as perennial ones. The system being independent of distance of use or application offers an ease of transport into a mass for large-scale uniform planting. This is the fact that in the recent times, the commercial growers do not rely on the nature to introduce the genetic mutation that will make them millionaires but depends on the art and scientific knowhow to create a novelty in its own. This has resulted in the seriousness and painstaking effort of the growers to produce the plants round the year in new forms and shapes to put forward a new plant with extra-ordinary marketable characteristics every year, e.g. compact chrysanthemum, kalanchoe, bromeliads, orchids, etc are some of the common products with an unusual and eye-catching hue in the auction markets. Similarly, a large number of annual and perennial plants perfectly suited for various kind of landscaping, slope, soil types and moisture regimes under the specific and artificial environment created for a specific growth of the plant.

The leek is a centuries-old crop native to the eastern Mediterranean and the Middle East. The plant is linked to the onion, and its flavour is mild, sweet, and onion-like. Leek stalks are commonly used in European soups and stews, particularly as a side dish with potatoes, and can be cooked whole as a vegetable. It is a non-bulb producing onion family member farmed for blanched stem and leaves. It is eaten fresh or combined into salads, and it is cooked as a flavouring in soups and stews. It is not grown commercially in India, although it is a popular vegetable in a kitchen garden. The climate and soil conditions are the same as for onion.

Botany and taxonomy: The leek is a vegetable that is a cultivar of Allium ampeloprasum, often known as the broadleaf wild leek. 

Introduction 
The transformation of governance through digital means represents one of the most consequential shifts in contemporary public administration. Digital governance or e-governance entails strategically applying information and communication technologies (ICTs) to enhance the accessibility, efficiency, transparency, and responsiveness of government functions and public service delivery. In India, this digital shift has accelerated over the past two decades, driven by imperatives to modernise the state apparatus, promote inclusive development, and meet the rising expectations of a digitally literate citizenry. A complex interplay of demographic diversity, federal administrative structures, and asymmetries in socio-economic development shapes India’s trajectory toward digital governance. The proliferation of mobile devices, growth in internet penetration, and public investments in digital infrastructure have enabled a gradual shift from paper-based systems to platform-based governance. Concurrently, global paradigms such as open government, digital inclusion, and citizen-centric innovation, captured in international indices like the UN E-Government Development Index and the World Bank’s GovTech Maturity Index, have influenced national aspirations and strategy formulation. However, these technological and global catalysts can only be transformative when embedded within a coherent legal and policy framework that ensures institutional legitimacy, citizen trust, and systemic accountability. In this regard, digital governance’s legal and policy foundations are critical for establishing enabling conditions for its practical and equitable implementation. As highlighted by Sachdeva (2002), the transition to digital modes of governance requires not only the removal of outdated regulatory provisions but also enacting new laws on digital authentication, electronic records, data protection, cybercrime, and privacy. Additionally, procedural simplification through single-window systems, interoperability standards, and e-payment protocols is essential to reduce administrative friction and promote

As the aquarium industry expands, its legal, ethical, and environmental dimensions have gained increasing importance. Responsible and sustainable fishkeeping hinges on a clear understanding of wildlife regulations, species preservation, animal rights, and the potential ecological impact of aquarium activities.
In India, the Wildlife Protection Act of 1972 forbids the capture and trade of specific native species. Breeding or selling fish such as Channa species, Tor species, or reptiles like the Red Sand Boa is deemed illegal unless special authorization is obtained. Introducing invasive species into natural ecosystems is also regulated, as such activities can disrupt ecological balances and cause long-term damage.
Globally, the Convention on International Trade in Endangered Species (CITES) monitors and controls the international trade of vulnerable species such as seahorses, various corals, and marine turtles. Anyone involved in import or export must follow strict documentation, permitting, and inspection protocols. Environmental concerns linked to the trade include destructive collection methods, reef degradation, and improper disposal of fish or water into natural environments. Responsible aquarists are encouraged to prioritize captive-bred fish, buy only from sustainable sources, and adopt proper tank management and waste disposal practices.
Ethically, aquarists must avoid animal mistreatment by preventing overcrowding, offering suitable tank conditions, and ensuring the health and welfare of all aquatic life. Awareness campaigns, effective law enforcement, and the promotion of sustainable practices can transform fishkeeping into a tool for conservation, public education, and sustainable livelihoods.

I. ROLE OF INTELLECTUAL PROPERTY

The international community has set itself the target of reducing the proportion of people below poverty line to half by 2015, along with associated specific targets for improving health and education and environmental sustainability. The Millennium Development Goals, adopted at various international fora, recognize the crucial importance of reducing poverty and hunger, improving health and education, and ensuring environmental sustainability. It is important to know whether and how intellectual property rights (IPRs) could play a role in helping the world meet these targets — in particular by reducing poverty, helping to combat diseases, enhancing access to education and contributing to sustainable development, protecting our cultural heritage, safeguarding the food security for the country. It is also necessary to deliberate whether and how they create obstacles to meeting those targets and, if so, how those obstacles can be removed.

There are strong views from both sides on the protection and enforcement of IPRs though there is no data to check these views objectively. Some argue strongly that IPRs are necessary to stimulate economic growth, which in turn, helps in poverty reduction. By stimulating invention and new technologies, IPRs help to increase agricultural or industrial production, promote domestic and foreign investment, facilitate technology transfer and improve the availability of medicines necessary to combat diseases. They are also of the view that there is no reason why a system that has worked for developed countries would not work for developing countries. Others argue equally vehemently the opposite. IPRs do little to stimulate invention in developing countries, because the necessary human and technical capacity may be absent there. In assessing these opposing arguments, it is important to remember the technological disparity between developed and developing countries as a group. What role the intellectual property can play to plug this gap is a serious subject for every developing nation? For this, it is also pertinent to know about the IPRs, the challenges they pose to the legal system in general and to the Indian legal system in particular, and their basic rationale to take a considered approach in their implementation.

Introduction

Agribusiness refers to the industry that deals with farming and the selling of agricultural products, including the cultivation of crops, their processing, and their distribution to retailers. Producing and distributing crops, agrichemicals, fodder, breeding, farm equipment, seed supply, raw and processed commodities of food and fibre, warehousing, transporting, packing, marketing, retailing, soil testing, and testing for nutrient deficiencies are all part of the agribusiness industry.

It's important for an excellent brand name to provide a solid basis on which a company can grow. Companies need to identify who they are trying to sell to. Will people have no trouble pronouncing it? The tongue shouldn't have to work too hard to say it. Can you pronounce the name easily? Your brand name needs to be audible to consumers. Have you tested the name's spelling ability?

Choosing what aspect of agriculture or agribusiness you want to enter is the f irst step. So, you can't make a call like this until you have a firm grasp on your company's long-term goals, operational strategy, and financial situation. You can still enter the market if you aren't an expert in the equipment, products, grains, soil, seeds, or plants involved; nevertheless, you should go in with your eyes wide open, a well-thought-out business plan, and a competent team.

8.1 Key legal statutes and regulatory foundations
Various policy measures were also undertaken by the Government of India in due course of time. The Government of India enacted four science policies after gaining independence, i.e. Scientific Policy Resolution (1958), Technology Policy Statement (1983), Science and Technology Policy (2003) and Science Technology and Innovation Policy (2013). The 1983 Technology Policy Statement possessed a simple goal of creating indigenous technology and boosting efficient absorption and adaptation of imported technologies suited to the nation’s priorities and. The Technology Policy Statement of 1983 was followed up through the establishment of the Technology Information Forecasting and Assessment Council (TIFAC), an autonomous organization entirely owned by the Government of India under the Department of Science and Technology during 1988. TIFAC also offers some funding and supports development and commercialization of technologies through the home-grown technology scheme, among its other operations. The Technology Development Board Act (1995) was also a significant policy move of the government in the same direction. Also in recent times, the Government of India also unveiled its own National IPR Policy 2016 with the motto cum slogan “Creative India, Innovative India”. In addition, the policy is aligned to a number of other schemes of the Indian Government like “Make in India”, “Atal Innovation Mission”, “Start-Up India” and “Stand-Up India”, all aimed at encouraging creativity, innovation and entrepreneurship in the nation.

Introduction

Non Governmental Organizations (NGOs) are the organizations engaged in particular plethora of activities aimed at protecting and promoting the varied interests of the people. As the name suggests, NGOs are the state independent voluntary groups working towards various social causes – ‘Charitable Purposes’. Section 2 (15) of the Income Tax Act 1961 explains charitable purpose as those activities aimed at the relief of the poor, education, yoga, medical relief, preservation of environment including the watersheds, wild life forests and preservation of monuments or places or objects of artistic or historic interest and the advancement of any other object of general public utility. These ‘Not–for Profit’ organizations differ from other business as the main aim of such ventures is charity not generating profits. These NGOs are prohibited from distributing the income generated from their working among its members. There is no single consolidated act dealing with the formation and registration of NGOs. This is because an NGO is an umbrella term for all the charitable ventures. An NGO, in itself, can have various structures. These can be registered as societies, trusts and as private limited. Non-profit companies commonly referred to as section 8 companies therefore an NGO can be registered under any of the three acts i.e., Company Act (2013), Societies Registration Act (1860) and Indian Trust Act (1862).

Rivers are vital ecological corridors that sustain biodiversity, regulate the water cycle and underpin human civilization by providing water, food, transportation and energy. In India, river ecosystems face mounting threats from pollution, over-extraction, habitat degradation and climate change, necessitating a robust constitutional, legal and policy framework for their protection and sustainable management. The Indian Constitution, through Articles 48A and 51A (g), alongside judicial interpretations of Article 21, has elevated environmental protection (including river conservation) to a fundamental right, reinforced by landmark Supreme Court judgments that embed principles such as polluter pays and the precautionary approach. Key national policies, including the National Water Policy, National River Conservation Plan, and flagship initiatives like Namami Gange, emphasize integrated river basin management, participatory governance, and community engagement. Despite these advances, challenges persist due to fragmented institutional arrangements, enforcement gaps, persistent pollution and the impacts of climate change. Future directions call for legislative reforms, empowered river basin authorities, technological innovations and greater public participation to ensure the ecological integrity and long-term sustainability of India’s rivers for present and future generations.

The National Food Security Bill 2011, which is now on the website of the Union Ministry of Food and Consumer Affairs for public comments, aims to make the Right to Food a legal right. During the last seven years, the country has witnessed a transition from political patronage to legal entitlements in the case of education, information, work and land rights in tribal areas. When finally enacted, the Food Security Bill will be the brightest jewel in the crown of Indian democracy. Therefore, public scrutiny of the draft Bill is important. The draft Bill mentions that its aim is “to provide for food and nutritional security in human life-cycle approach by ensuring access to adequate quantity of quality food at affordable prices, for people to live a life with dignity”. Unfortunately the Bill is its present form will not be able to fulfill this inspiring objective.

The legal commitment contained in the Bill implies that every child, woman and man should have physical and economic access to balanced diet on the basis of a life-cycle approach, i.e., from conception to cremation. Nutrition security involves access not only to the needed calories and protein, but also to micro-nutrients like iron, iodine, zinc, vitamin A, and vitamin B12. In addition, clean drinking water, sanitation and primary health care are essential for ensuring that food is properly assimilated in the body.

Introduction

Export of quality seafood products is important to have a success in international marketing. Exporters must be quality conscious and the Governments must insist on quality control and inspection. The seafood export industry in India is over 50 years old. Seafood contributes 10% of the total exports and nearly 20% of all agricultural exports. In the year 2022-23, India exported 17,35,286 MT seafood to more than 100 countries worth US $8.09 billion equivalent to Rs. 63,969.14 crore. There are over 150 fish processing facilities approved by the European Union out of the existing 350 processing facilities. The Export Inspection Council and the Marine Products Export Development Authority are working very closely with the fish processing industries for the growth of seafood exports.

The Government of India enacted the Export (Quality Control and Inspection) Act, 1963 for the development of export trade through quality control and inspection. It empowers the Government to notify the products intended for compulsory quality control and inspection prior to their export. It specifies the type of quality control required for the notified products. It recognizes standard specifications for a notified product. It prohibits the export of notified products that are not complying with export conditions. It creates a machinery for quality control and take measures to protect markets for Indian commodities. As the first step, Export Inspection Council (the Council) was established on 1st January 1964 for implementation of various provisions of the Export (Quality Control & Inspection) Act, 1963.

Introduction

This led to an extended debate and international co-operation in the recognition of plant-related intellectual property rights, resulting in a greater attention being paid to questions of ownership of genetic resources. At the same time concerns for sustainable use of biological diversity were also raised.

One of the major events was the Convention on Biological Diversity (CBD) which came into force in 1993, which was adopted during the Rio Earth Summit of the United Nations. It was the first legally binding institutional mechanism, providing for conservation and sustainable use of all biological diversity and intends to establish the process of the equitable sharing of benefits arising out of the use of biodiversity.

The Convention on Biological Diversity

The CBD was conceived in the 1980s and was negotiated under the leadership of the United Nations Environment Programme (UNEP). It was adapted in June 1992 at Rio de Janeiro, at the Earth Summit, and is effective since December 1993.

4.1. Introduction

Presently, in the world, there are 195 countries according to the United Nations, and the number would even go up to 247 if we consider the disputed territories like Isle of Man, Hong Kong, etc. (United Nations, 2016) (Kershner, 2020). But the majority of the countries are still struggling to provide basic life-supporting amenities like nutrition, shelter, and employment. Conjointly, termed as emerging and developing countries such as India, Vietnam, Venezuela, Utopia, etc. (Ahmed and Shimada, 2019). Most of the developing countries are situated mainly in the continent of Africa, Asia and South America. They have got independence for the European countries like England, France, Portugal and Spain in the mid and late 20th century. 

Food security, nutritional security, sustainability and profitability are the main foci ofpresent agricultural scenario in India. In the absence of additional land for bringing under plough vertical growth in agriculture through intensive cropping and enhanced productivity becomes inevitable. Intensification of agriculture to meet the growing needs of the burgeoning population has brought with it numerous productivity related constraints. It has triggered multiple nutrient deficiencies in soil and this has raised doubts on the soils capacity to sustain anticipated production levels. One of the key inputs in enhancing and maintaining the productivity ofintensified agricultural systems is chemical fertilizer which provides nutrients in readily available form. But long term experiments on various cropping systems at various agroecological regions and soil types revealed that continuous use of chemical fertilizers in unbalanced and indiscriminate manner deteriorates the soil health and leads to deleterious effect on long term soil fertility and yield sustainability. Apart from the soil productivity issue, the use of chemical fertilizer is also becoming more and more costly due to scarcity during peak demand. The excessive use of chemical fertilizers is not only costly but they pollute the production environment (Singh et al., 2005; Dwivedi et al., 2003).

In the coming decades, a major issue in designing sustainable agriculture system will be the management and rational use of organic inputs such as animal manure, green manure, crop residues and biofertilizers etc. (Powlson, 1994). Long term studies indicated that current fertilizer recommendations are inadequate for maintaining yields (Bhandari et al., 2000; Singh and Mishra, 2010; Tiwari et al., 2006). It is, therefore, to sustain high crop yield without deterioration of soil fertility it is important to apply required amount of plant nutrients through fertilizers in combination with organic sources, crop residues, biofertilizers etc.

Introduction

Embarking on the journey of legume cultivation in India reveals a nuanced landscape marked by both challenges and promising horizons. The agricultural scenario is akin to orchestrating a symphony, where legumes play a vital role, contributing melodies of resilience and significance. Unveiling this leguminous symphony in India is an exploration into the intricate interplay of obstacles and potential triumphs within the agricultural sector. As we delve into an overview of legumes, commonly known as pulse crops, their significance in Indian agriculture becomes apparent. Belonging to the Fabaceae family, these plants possess a distinctive feature - the ability to harness nitrogen from the atmosphere. This unique characteristic renders them pivotal components in sustainable agricultural systems, impacting not only food and nutritional security but also influencing the broader scope of soil fertility enhancement and economic prosperity. The journey through legume cultivation in India unfolds as a harmonious narrative, weaving together the challenges faced and the promising prospects that lie ahead in this agricultural symphony (Sow and Ranjan, 2021).

Among thirty major cropping systems in the country, which contribute significantly to the national food basket, the majority are cereal-based. In fact, continuous cropping of cereal-based systems during last three decades has resulted in second generation problems and the sustainability of these systems is under threat. The major challenge is to produce more from each unit of land on the one hand and to sustain soil health on the other. The depletion of soil fertility by the intensive cereal-cereal production systems is considered to be a major cause of the yield decline. For example, a rice-wheat cropping system (RWCS) yielding 7 t/ha of paddy and 4 t/ha of wheat removes 315 kg nitrogen (N)/ ha, 28 kg phosphorus (P)/ ha and 333 kg potassium (K)/ ha, and significant amounts of micro-nutrients (Hegde and Dwivedi, 1992). These off-takes often exceed fertiliser input in many Indian states. Refinement of nutrient management strategies would help maintain the crop productivity and soil fertility, but other rotational strategies could also help especially in situations where greater fertiliser use may be uneconomic or environmentally unacceptable. Legume crops fix atmospheric N and enrich soil fertility, and could help to sustain the long-term productivity of cereal-based cropping systems. Depending on the soil and ecological stresses, a cropping system can be diversified using legumes under different mode. Results from the All-India Coordinated Project on Integrated Farming Systems (AICRP-IFS) of Indian Council of Agricultural Research show consistently better productivity with inclusion of legumes in cropping systems. The benefits of legumes in rotation are not solely due to biological nitrogen fixation but also because it increased nutrient availability, improved soil structure, reduced disease incidence and increased mycorhyizal colonization (Wani et al., 1995). Inclusion of pulses as intercrops in sequential as well as intercropping systems would not only make the country self reliant but also help in improving the soil health. Series of experiments are being conducted under (AICRP-IFS) and elsewhere in the country to identify need based cropping systems for different agro-climatic zones of India. The pre-dominent cropping systems involving legumes as a strategy for nutrient management through different approaches are being discussed here for ready reference of researchers, planners and extension workers.

Peas and beans belonging to the family Fabaceae (Syn. Leguminosae) are delicious and preferred vegetables grown throughout the world. These include cool season vegetables like pea, French bean, lima bean, broad bean and tropical vegetables like cowpea, hyacinth bean, winged bean, jack bean, sword bean etc.  These are integral components of sustainable agriculture due to their ability to fix atmospheric nitrogen and to improve soil properties. Legume vegetables are rich in protein and essential amino acids and have significant role in combating malnutrition among poor people and vegetarians.

Peas and beans belonging to the family Fabaceae (Syn. Leguminosae) are delicious and preferred vegetables grown throughout the world. These include cool season vegetables like pea, French bean, lima bean, broad bean and tropical vegetables like cowpea, hyacinth bean, winged bean, jack bean, sword bean etc. These are integral components of sustainable agriculture due to their ability to fix atmospheric nitrogen and to improve soil properties. Legume vegetables are rich in protein and essential amino acids and have significant role in combating malnutrition among poor people and vegetarians.

Common features of legume vegetables are summarized below:

1. All legume vegetables are self-pollinated due to cleistogamous nature. Flowers are zygomorphic with papilionaceous corolla, mono-adelphous or di-adelphous stamens.
2. All are direct sown crops and do not respond to transplanting. Since seed size is comparatively bigger and they are closely planted, a high seed rate is required for most of crops.

Soil-rejuvenation power of legumes in crop rotations has been known in several parts of the world since ages. It is mentioned in the Indian agriculture of the Chalcolithic period (ca 1000 BC) (Raychaudhuri and Mira, 1993), in Chinese agriculture in the Han dynasty (ca 2nd century) (Hsu, 1980) and in Roman agriculture (White, 1970). Legumes can be ?tted in cropping systems in India in a number of ways, such as, a crop in a cropping system, a catch crop in an intensive cropping system, an intercrop and as a green manure. A brief discussion on these follows.

Enhancement of population is a global issue and the expected world population will be 9.7 billion in 2050 (UN, 2019). Under the situation, achievement of food and nutritional security is a major target with reduction of GHGs to the atmosphere and mitigation of ill effects of climate change. Modern agriculture is responsible for emission of GHGs in many ways and one of them is production of synthetic N fertilizer. There is no doubt about the fact that chemical N fertilizers enhance crop yield but it is at the cost of atmospheric equilibrium and agricultural sustainability cannot be achieved by this practice (Bedoussac et al. 2015; Layek et al., 2018).

Keys to Genera
Flowers zygomorphic, stamens definite, corolla papillonacious, petals imbricate: 1I, 1O, 3 IO
Group I:    Herbs or shrubs, leaves imparipinnate, leaf lets entire, pods usually dehiscent, or if indehiscent usually small, a few seeded. Cyamopsis
Group II:    Herbs low or climbing, leaves paripinnate, leaflets ending in a tendril or bristle, style bearded, pods dehiscent.
Sub group 1: Staminal tube oblique at mouth, pod compressed. Vicia
Sub group 2: Staminal tube truncate (cutting off) at mouth, pods torpid.  Pisum
Group III:     Climbing or prostrate and rarely erect
Sub group 1: style bearded, stamen diadelphous
Sub-sub group: stigma terminal: Dolichos
Sub-sub group: Stigma oblique: Keel spiral : Phaseolus
Keel not spiral: Vigna
Sub group 2: Style not bearded, stamen monodelphous: Canavalia
Group IV:    Trees or shrubs, some times climbing, pods indehiscent: Psophocarpus

Garden Pea
It is cool season crop cultivated throughout the world. It is extensively grown in temperate zone and is restricted to cooler altitudes in tropics and winter season in sub tropics. It is rich source of proteins (25.6%), amino acids and sugars. It goes well with other vegetables in vegetable dish.

Legumes
Mutualistic bacteria, such as Rhizobium, form symbiotic relationships with leguminous plants, including various species within the pea family. The Leguminoseae family is particularly recognized for its ability to engage in symbiosis with nitrogen-fixing bacteria and its resilience to drought conditions. Among pasture legumes, clovers (Trifolium spp.) are predominant, with red clover (Trifolium pratense) and white clover (Trifolium repens) being the most prevalent species in cooler, wetter regions like Europe and New Zealand. Clovers exhibit a higher protein and mineral content compared to grasses, particularly in terms of calcium, phosphorus, magnesium, copper and cobalt, although their nutritional value tends to diminish as they mature.
The sugars found in clovers are akin to those in grasses, with sucrose being the primary sugar. While fructans are typically absent, starch is present, with concentrations in dried red clover leaves reaching up to 50 g/kg DM. In the UK, lucerne is characterized by its high fiber content, especially in the stems, which can reach crude fiber levels of 500 g/kg DM at the late flowering stage. Lucerne cultivars are categorized based on their flowering times, with early-flowering varieties recommended for UK conditions. These varieties generally bloom in the second week of June; however, to ensure acceptable digestibility, the initial harvest should occur at the early bud stage (end of May), when the anticipated digestible organic matter (DOM) content is between 620 and 640 g/kg DM. Subsequent cuts should be made at intervals of 6 to 8 weeks, yielding DOM values of 560 to 600 g/kg DM. In Britain, the limited area of lucerne cultivated is primarily harvested for silage or artificial drying, whereas in other regions, particularly the USA, where it is referred to as alfalfa, the crop is also utilized for grazing. Berseem, also known as Egyptian clover (Trifolium alexandrinum), is a significant leguminous plant cultivated primarily in the Mediterranean region and India. Its rapid growth during the cooler winter months in subtropical climates is highly regarded, along with its ability to recover effectively after being cut or grazed. The nutritional profile
of berseem is comparable to that of lucerne. Additionally, crops such as peas (Pisum sativum) and faba beans (Vicia faba) are occasionally cultivated as green fodder. When harvested at the early flowering stage, these crops exhibit a nutritive value akin to that of other legumes.

Leguminous vegetables include peas, French bean, Lima bean, broad bean, cowpea, hyacinth bean, winged bean etc. They belong to the family Fabaceae (Syn. Leguminosae). These are cultivated either as sole crop is sometimes as intercrop. In some areas they are used in backyard cultivation also. Most of them are short duration crops and are self pollinated.

8.1. Peas (Pisum sativum L.)

The pea (Pisum sativum L.) is a very common nutritioius vegetable grown in cool season throughout the world. It belongs to the family Fabaceae (Syn. Leguminaceae) and genus Pisum. A pea is most commonly the small spherical seed or the seedpod of the pod fruit Pisum sativum L. The pea cultivars are grouped into several groups based on shape of seed, plant height, maturity and use of pods. This crop is cultivated for its tender and immature pods for use as vegetable and mature dry pods for use as a pulse. In both the cases the seeds are separated and used as vegetable or pulse. The central Asia is regarded as the place of origin for all legumes including pea. Based on the genetic diversity, Central Asia, the Near East, Abyssinia and the Mediterranean is considered to be its centre of Origin. Cultivated garden pea is not seen in wild state and it might have been originated from wild field pea or other related species. In India it widely cultivated states of Uttar Pradesh, Bihar, Haryana, Punjab, Himachal Pradesh, Orissa and Karnataka. Followed by Madhya Pradesh, Himachal Pradesh, Assam and Jharkhand.

Cultivars/Varietie: Peas varieties are grouped based on maturity (early, mid season and late) plant height (Bush or dwarf, medium tall and tall). The major cultivars under cultivation in different parts of the country are Arkel, Bonneville, Harbhajan, FC-1, Arka Ajit, UN 53-6 (whole edible type), Jawahar Matar 1, Jawahar Matar 2, Jawahar Matar 3, Jawahar Matar 4, Jawahar Matar 5, Jawahar Peas 83, JP 4 (JM 6), JP 19, Lincoin, Mattar Ageta 6, Pantnagar Matar 2, Pant Uphar (IP 3), P 88, PRS 4,Ooty-1 and VL 3.

Leguminous vegetables include wide range of vegetables which can grow in climatic conditions extending from warm to cool weather. They are rich in protein, essential amino acids and fibre hence, recognized as an important component in ensuring nutritional security. They are growing for its pods for vegetable purpose, seeds as pulse or for dual purpose. They are excellent green manures that fix atmospheric nitrogen into soil and cultivation of leguminous vegetable crops is recommended as an integral component in sustainable soil fertility management. Leguminous vegetables include tropical types namely cowpea, hyacinth bean, winged bean, jack bean, sword bean while, cool season legumes include French bean, garden peas, lima bean and broad bean. They are mostly self-pollinated owing to its cleistogamous flowers. Pole or bush types are available in these crops and all are seed propagated. Among the different leguminous crops, French bean, garden peas and cowpea are under commercial cultivation while other leguminous vegetables are region specific in cultivation.

Cowpea (Vigna unguiculata)

Cowpea is a warm season legume grown both as vegetable crop as well as pulse crop. Tender pods are used as vegetable and dry beans are used as pulse. Cowpea is mainly growing for its seeds as pulse than as vegetable crop. The vegetable types bear stringless pods of more than 30 cm long, fleshy pericarp and higher monosaccharide to polysaccharide ratio. Cowpea is believed to be originated and domesticated in West or Central Africa especially Nigeria where diversity was noticed abundant. The cultivated cowpea, Vigna unguiculata is divided into different cultivar groups viz., pulse type as Vigna unguiculata var. unguiculata, Vigna unguiculata var. cylindrica or var. biflora as dual purpose type for fodder and dry seeds and vegetable type as Vigna unguiculata var. sesquipedalis (yardlong bean/string bean/asparagus bean). The cultivar groups, biflora and sesquipedalis are suggested to be originated from ssp. unguiculata in India and South East Asia respectively.

Low External Input Agriculture (LEIA)

It is a form of agriculture wherein the use of external inputs including chemical inputs is minimized and production is kept sustainable. It uses synthetic fertilizers or chemical pesticides below rates commonly recommended by the Extension workers. There is no elimination of these materials. Any system that reduces purchased chemical inputs can be called low-input farming. Yields are maintained through greater emphasis on crop rotation, crop residues, animal manures, biofertilizers, IPM, IWM and utilization of on-farm resources and management. Locally available resources are used by maximizing the complementary and synergistic effects of different components of the farming systems. There is use of external inputs in a complementary way. Main advantages of this type of agriculture are:

Youth are the creative force potential and a strength symbol for every community. One of the hallmarks of the positive youth development movement is that it is built on a foundation of scientific research. In addition, youth development programs typically work through existing social organizations rather than focusing on individual counseling. The rural youth work of FAO over the years has made significant contributions to make the lives of young people from rural areas more productive and meaningful by strengthening the organizations which serve them. The needs and challenges of rural young people today are greater than they have ever been in the past. In most developing countries, youth make up well over one-half of the total rural population. Because of their number and potential impact, rural youth must be a major part of any equation dealing with immediate and long-term solutions to solving problems of food security and sustainable development. Rural youth living in rural areas get limited opportunities for educational attainment in village areas. Opportunities for vocational guidance are also limited causing them diverting towards non creative activities and for merely wastage of time. An investigation was undertaken to study the socio-economic characteristics  and leisure time activities of rural youth. The study was conducted in College Development Block comprising Hatkanangle, Radhanagari & Bhudargad Tahsils of Kolhapur district, Maharashtra. From the Tahsil, 10 villages were selected randomly.  From each village, nine rural youths were selected randomly. Thus in all 90 rural youth were finally selected for the study. 

The efforts to keep pace with the fast life are causing mental and physical tensions. Diversion and relaxation is needed for the revival of spirit and enthusiasm. Leisure is an unimposed free time, after the practical necessities of life have been attended to. It is the time spent in activities chosen by the individual rewarding for its own sake. Choice of leisure time activities may also depend on the regularity of free time. An activity performed during small amounts of free time may be different than the one planned for a large block of free time. The leisure activities have far reaching influence on the personality development of the youth. If these youngsters are trained to make use of their leisure time for productive purpose, their endless energies could be channelised into fruitful development work.

An investigation was carried out involving 120 rural youth from Kapasi and Mardasgaon villages in Gangakhed taluka of Parbhani district from marathwada region of Maharashtra state, to asses the leisure time utilization by rural youth.  The sample included 70 boys and 50 girls.

Profile of Rural Youth

Education : As regards the education of female youth is concerned, 30 percent of them were educated up to H.S.C. and S.S.C, level where as 20 percent of them were educated up to high school level and 10 percent of them were degree holders and educated up to middle school level.

Youth, as a concept, has been generally defined all over the world as a group of human beings who have reached the end of puberty but have not yet acquired the full rights and duties of adult life ( Friedman: 1971).  Undeniably, the youth constitute a vast reservoir of energy especially in underdeveloped countries including India. Out of the 120 crores population of India, those in the 15 to 30 age group constitute 50 per cent which means that 60 crore young people, men and women, are available for handling various tasks of development, local, regional and national.  Progress of the country depends on the participation and full involvement of all sections of people especially youth. Youth can make their constructive contribution to national development and through which society can benefit from the idealism and sense of dedication of youth. At the same time, they also benefit from their active participation in developmental activities. Since such participation increases their self esteem, give them a sense of identity and of being needed by society.  The human life passes through various stage such as infancy, childhood, adolescence, youth, adult and old. Out of these stages the youth stage is very crucial and dynamic in the life of an individual as from this stage individual starts assuming responsibilities in the life and learns practically the social rules by coming in contact with world outside the family.  Youth is the time of life marked by growth and development. It is the period between childhood and maturity. United Nation has defined youth as those young people within the age group of 15 to 24 years both inclusive. Youth symbolizes zest, idealism, dynamism, enthusiasm and energy.

2.1. Origin and distribution

• Native to India and Sri Lanka.

• Widely cultivated in tropics and subtropics.

2.2. Economic importance

• Cochin grass or Malabar grass or East Indian or True Lemon grass; perennial and multi cut aromatic grass.

• Lemon like odour due to presence of 70-90% citral, a cyclic monoterpene.

• Other compounds are geraniol, citronellal etc.

Shoot borer: Chilo infuscatellus : Pyralidae

This pyralid is more commonly known as a pest of sugarcane. Eggs are laid in batches on lower side of leaves.  The emerging larvae move down and cut a hole at the ground level and enters the stem.  Due to feeding of larva, the central shoot begins to wilt and dry causing dead heart. The yield of the crop is affected.New tillers may develop but will not have the physiological maturity and oil content at the time of harvest.

Introduction
Lemongrass grows widely in many tropical and subtropical parts of Asia, Africa and America. East Indian or true lemongrass (C. flexuosus) is indigenous to India and large variability occurs in the Western Ghats comprising Kerala, Karnataka and T.N., besides Sikkim and A.P. Its cultivation and distillation of oil started first in Kerala and now grown in Assam, Maharashtra and U.P. The strong lemon like odour of the oil of the grass is responsible for its nomenclature. Predominantly, there are two types of lemongrass under cultivation, viz., the East Indian or Cochin or Malabar grass (Cymbopogon flexuosus) with superior oil quality (75-85% citral) and preferred by the industry.
The other West Indian or American lemongrass (Cymbopogon citratus (D.C.) Stapf. is mainly cultivated in West Indian islands, Guatemala, Brazil, Mexico and Madagaskar; and comora islands, Thailand, Bangladesh and China. It has lower citral content and lower solubility in 70% alcohol. It is indigenous to India and spread over Western Ghats, comprising Kerala, Karnataka, TN, Sikkim, Arunachal Pradesh, Assam, Maharashtra, parts of Uttar Pradesh, Punjab and Haryana.
Besides, a separate culture called Jammu lemongrass (Cymbopogon pendulus) is another indigenous species found wildly growing in West Bengal, Sikkim, Assam and M.P. It also has high citral content, but cultivated to a limited extent in parts of Jammu in northern India.

Aim

To know the portion of limb to be covered by P.O.P cast bandage for immobilization of fore limb (Fig 1a) & hind limb ( Fig 2a) bone fracture.

As per general rule, joint below and joint above should be covered.

Lentil is one of the oldest nutritious rabi pulse crop. The whole or splitted seeds are used in preparing dal and delicious namkin commonly called dalmoth. The splitted seeds are also used in making soup and porridge. Green pods are used as vegetables. The leaves and stalks are used as cattle feed.

Abstract

Lentil (Lens culinaris Medik) is an important rabi leguminous annual herb with rich source of protein and other balanced nutrition. Lentil is susceptible to many insect-pests and diseases which causes significant yield loss which may range from 50 to 100% leading to one of the most important biotic constraints in productivity. The major fungal diseases in lentil are Fusarium wilt, Ascochyta blight and rust which causes severe losses in lentil production. Other minor diseases like botrytis grey mould, anthracnose, alternaria, stem rot, collar rot and some viral diseases also infect the lentil field under condusive environment conditions. Coming to major insect pests of lentil viz. helicoverpa, aphids, leaf weevils and lygus bugs with several noteworthy minor field pests such as thrips and cutworm with few storage pests that infest the crop. With an integrated blueprint of disease management, one can minimize risk of yield loss by following modified package and practices with need based use of pesticides, thus maximizing profit in lentil production.

Lentil is one of the most nutritious cool season food legume and ranks next only to chickpea. It is grown throughout the northern and central India for grains, which are used as dal (wholeor dehulled) andin various otherculinarypreparations. Lentil contains about 25% protein, 0.7% fat, 2.1% mineral, 0.7% fibre and 59% carbohydrate. It is a rich source of phosphorus and carotene. It is generally grown as rainfed crop during rabi season after rice, maize, pearl millet orkharif fallow. It is also grown as intercrop with barley, linseed, mustard and autumn planted sugarcane. In North-eastern parts of the country, lentil is also cultivated as paira crop with rice in which seeds of lentil are broadcast in the standing crop of rice 7-10 days before its harvest. It is grown on a wide range of soils from light loamysand to heavy clay soil in northern parts and moderately deep black soils in central India.

Lentil (Lens culinaris, 2 n = 2 x = 14, family Fabaceae/Leguminosae, subfamily Papilionaceae, essentially self-pollinated annual) has average global area, production and yield during 2015-17 as 5.56 million ha, 6.55 million tons of production and 1178 kg/ha as per FAOSTAT. The top ten lentil producing countries globally are Canada, India, Turkey, USA, Nepal, Australia, Ethiopia, Bangladesh, China, and Kazakhstan. India produced 0.94 million tons of lentil from 1.60 million ha with a productivity of 587 kg/ha during 2010-11. The corresponding figures for the year 2018-19 are 1.56 million tons, 1.51 million ha and 1033 kg/ha indicating a significant gain in the productivity over the years (Directorate of Economics and Statistics, 2020). The top states in lentil production in India are Madhya Pradesh (40%), UP (30%), West Bengal (11%) and Bihar (9%). Rest of the states is insignificant. The plant was given the scientific name Lens culinaris in 1787 by Medikus, a German botanist and physician.

Wilt appears in the fi eld as patches is both seedling stage and developed plants. Symptoms include drooping and wilting of uppermost leaves. Plants become completely yellow and die. Plants are affected during the pod fi lling stages, seeds are often shrivelled. There will be rotting at the basal portion of the plant. Discoloration of vascular bundle are noticed when the stem is spitted
open.

The name Lepidoptera derived from the Greek words “lepido” meaning Scale and “ptera” meaning wings refers to the flattened hairs (Scales) that cover the body and wings of most adults. Lepidoptera (Moths and Butterflies) is the second largest order (1.10 lakh sp.) in the class insecta, characterized by the body, wings and appendages being generally covered densely with pigmented scales which provide the colour pattern of the characteristic of the species and play an important role in courtship and intraspecific recognition.

Adults

• Head: Hypognathus and relatively small.

• Compound eyes are large and set well apart. Ocelli two in number in moths or reduced to Chaetosoma in butterfly.

• Mouthparts form a coiled tube (Proboscis) beneath the head.

• Antennal type:

• Butterflies: Clubbed, clavate, capitate.

• Moths: Pectinate (Uni/Bi).

• Adults have siphoning type mouthparts except in micropterygidae (Mandibulate mouthparts). Front wings large, triangular, hindwings large, fan shaped.

• Body and wings covered with small, overlapping scale.

• Thoracic segments are fused and metathorax is the largest and most prominent.

• Wings covered with scales. Androconia (Plumules) on upper surface of wings in some males serves as outlet for odouriferous glands. are fringed distally with each tip finely divided. • Wing coupling apparatus variable (generally Frenulum and retinaculum or Amplexiform type)

Role of Leptin in Uterine Function

Leptin is a 16 kDa protein consisting of 167 amino acids, encoded by the LEP gene located on chromosome 7q31.3. Structurally, leptin comprises four anti parallel alpha helices (A, B, C, and D), two long loops (AB and CD), and a short loop (BC). It has three binding sites: site I is in the C-terminal region of helix D, site II spans the surface of helices A and C, and site III is located near the N-terminal region of helix D. Its structural similarity to proinflammatory cytokines such as interleukin-6 and granulocyte colony-stimulating factor suggests its potential immune-modulatory roles.

Leptin’s effects on uterine contractions have been studied at length. In human uterine smooth muscle, leptin inhibits both spontaneous and oxytocin-induced contractions. Moynihan et al. (2008) reported that leptin caused a 46% reduction in spontaneous and a 42% reduction in oxytocin-induced contractions. A lesser degree of relaxation (36%) was noted in a larger study involving non-laboring human uterine tissue, while rat uterine tissue exhibited a 24% relaxation (Mumtaz et al., 2015). The concentrations used in these studies ranged from 1 nM to 1 µM, which includes the physiological range in pregnant women with normal body mass index (BMI). Leptin levels rise with increasing BMI during pregnancy (Hendler et al., 2005).

Synonyms :  Weil’s disease, Stuttgart disease, Infectious jaundice, Haemoglobinuria, Rice field worker’s disease, Swine handler’s disease, Sugarcane worker’s disease, Canine typhus

Leptospirosis is a worldwide zoonosis. According to the occupational groups involved and the nature of the disease presentations, different names have been used, e.g. seven-day fever found commonly in Japan, Cane cutter’s disease in Australia, Rice field Leptospirosis in Indonesia and Fort Bragg fever, which appeared as an outbreak in the US. Weil’s disease, which is one of the severe forms of this disease, occurs in many countries, including India and other South-East Asian Countries, China, continental Europe and England. Leptospirosis exists in all the five inhabited continents and in a large number of countries. It occurs in tropical, subtropical and temperate zones.  Leptospirosis is also an important cause of abortions, stillbirths and reproductive failures in cattle and pigs.  Periodic ophthalmia in horse is commonly associated with leptospiral infections. Leptospirosis was first recognized in humans in 1886 by Weil and characterized by icterus.  Leptospira have been isolated from a variety of animal species and humans manifesting various clinical syndromes such as mud fever and swine herd disease.

Leptospirosis is a worldwide zoonosis. According to the occupational groups involved and the nature of the disease presentations, different names have been used, e.g. seven-day fever found commonly in Japan, Cane cutter's disease in Australia, Rice field Leptospirosis in Indonesia and Fort Bragg fever, which appeared as an outbreak in the US. Weil's disease, which is one of the severe forms of this disease, occurs in many countries, including India and other South-East Asian Countries, China, continental Europe and England. Leptospirosis exists in all the five inhabited continents and in a large number of countries. It occurs in tropical, subtropical and temperate zones. Leptospirosis is also an important cause of abortions, stillbirths and reproductive failures in cattle and pigs. Periodic ophthalmia in horse is commonly associated with leptospiral infections. Leptospirosis was first recognized in humans in 1886 by Weil and characterized by icterus. Leptospira have been isolated from a variety of animal species and humans manifesting various clinical syndromes such as mud fever and swine herd disease.

Etiology: The etiologic agent of leptospirosis is Leptospira interrogans. It is a thin spiral organism 0.1mm x 6 -20mm, with tightly set coils, and it is characterized by very active motility, by rotating ("spinning") and bending. Usually one or both ends of this single-cell organism are bent or hooked, but straight forms also occur that rotate and travel more slowly than hooked forms. The cells have pointed ends, either or both of which are usually bent into a distinctive hook. Two axial filaments (periplasmic flagella) with polar insertions are located in the periplasmic space. The structure of the flagellar proteins is complex. Leptospires exhibit two distinct forms of movement, translational and nontranslational. Morphologically, all leptospires are indistinguishable, but the morphology of individual isolates varies with subculture in vitro and can be restored by passage in hamsters. Leptospires have a typical double membrane structure in common with other spirochetes, in which the cytoplasmic membrane and peptidoglycan cell wall are closely associated and are overlain by an outer membrane. Leptospiral lipopolysaccharide has a composition similar to that of other Gram-negative bacteria, but has lower endotoxic activity. Leptospires may be stained using carbol fuchsin counterstain. Leptospires are obligate aerobes with an optimum growth temperature of 28 to 30°C. They produce both catalase and oxidase. They grow in simple media enriched with vitamins (vitamins B₂ and B₁₂ are growth factors), long-chain fatty acids, and ammonium salts. Long-chain fatty acids are utilized as the sole carbon source and are metabolized by b-oxidation. Because of their narrow diameter, the leptospires are best visualized by dark-field illumination or phase contrast microscopy and they do not stain readily with aniline dyes. The free living (L. biflexa) and parasitic leptospires (L. interrogans) are morphologically indistinguishable.

INTRODUCTION

The genus Pratylenchus was established in 1936. It has a cosmopolitan distribution prevalent in temperate, sub-tropical and tropical regions. The species of Pratylenchus are popularly known as lesion nematode or meadow nematode. They are migratory endoparasites. Various pulse crops are damaged by them. P. thornei attacks chickpea,  P.zeae on mungbean (Walia and Seshadri, 1986); P. mulchandani on urdbean (Nanad Kumar et al., 1969) and Pratylenchus sp.on lentil (Mishra and Gaur, 1980) and cowpea (Aung and Prot, 1990).
Besides pulses species of Pratylenchus attack a number of other crops also. The infested plants exhibit various types of symptoms and results in heavy yield losses. Investigations have been made on various aspects of host-nematode relationship, distribution, host range, yield losses, biology, life cycle, disease cycle, interaction with other microorganism and management through cultural, physical, chemical, biological methods and host resistance.