eBook Chapters

The North Eastern region stretches from 21°25' to 29° 28' N and 80° 4' to 97°25' E and covers a total geographical area of 2.55 lakh square kilometer sharing about 8 percent of the country’s geographical area. The NE states, otherwise known as eight jewels, which are Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, Tripura and Sikkim. This region is characterized by inaccessibility, marginality, fragility, cultural heterogeneity, ethnicity, rich bio-diversity, low livestock and crop productivity. These states are the reservoirs for genetic diversity of tuber crops like Colocasia, Xanthosoma, Alocasia, elephant foot yam, Dioscorea and other minor tuber crops. The annual precipitation in the region is about 2450mm and maximum rainfall is received from South West monsoon.

Carrot

Genetic Resources

Wild carrot (Queen Anne’s Lace) grows in emperate region around the world but the extent of genetic variability in wild population has not yet been evaluated in Daucus carota or related species. Constance (1971), Heywood (1983) and Mathias (1971) have contributed much to our understanding of Umbelliferae systematics, but relatively little carrot germplasm has been collected for distribution. The cultivated carrot, Daucus carota L, intercrosses freely with almost all the wild forms. Although, no incompatibility has been observed but protandry is the main reason for cross-pollination. However, there is no barrier for selfing. Carrot variety Brasilia is resistant to nematode, Meloidogyne incognita, while species Daucus carota subsp. hispanicus has resistance to other nematode, M. hapla (Simon, 1993). The genetic material, resistant to disease and pest of carrot, which can be used for developing hybrids for abiotic stresses, are given in Table1.

Root crops are cool season vegetables growing for its fleshy root developed from the tap root and hypocotyl region. They are grown during winter in tropical and subtropical condition, throughout the year in hills and spring-summer in high altitude hills. The major root crops growing in our country include carrot (Umbelliferae), radish (Brassicaceae), beet root (Chenopodiaceae) and turnip (Brassicaceae). Two distinct types viz., asiatic or tropical types and European types present in these root crops except beet root. In beet root, European or biennial types only exist. The tropical types are annuals that does not require chilling treatment for flowering. Therefore, seed production of these types is taken up in plains but European types are biennials and they require vernalization treatment after vegetative phase for flowering. Hence, the seed production of biennial types is possible in hills. The seed productions of Asiatic varieties of root crops are done in Punjab, Haryana, U.P. and parts of Rajasthan and Gujarat. Whereas, the seed production of temperate varieties is done in Saproon valley, Kullu valley, Kalpa valley of H.P., Kashmir valley of J&K and selected location of Northeast region specially Sikkim and Arunachal Pradesh. The seed production of beet root is being done in high altitude hills of J&K. All the crops belonging to this group are similar in the cultural practices though they come under different family. All root crops prefer well drained loose and friable soil. Ridge or bed planting is mainly following in all root crops. They are direct sown crops and does not respond to transplanting. They are highly cross pollinated.

The two methods of seed production following in root crops are seed-to-seed method and root-to-seed method. The first method is followed for the production of truthfully labelled seed or certified seed as the seed yield will be more, but quality remains inferior to the second method. The breeder seed as well as foundation seeds require utmost quality hence root-to-seed is preferred for its production. In this method, the matured roots are harvested and the roots are inspected for its trueness. Only true-to-type roots are selected for replanting in the field for seed production and undesirable ones are discarded. The selection and rouging in seed crop are done on the basis of foliage characters and external and internal root characters (colour, shape, size, flesh colour, core size, pungency, indistinct rings etc.). The roots after selection are prepared for replanting by cutting one-third top (shoot) portion and one-fourth to one-half root cut. the prepared stecklings are replanted to obtain good yield of quality seeds. In case of turnip and beet, after selection, the tap root and tops of the roots are trimmed without injuring the crown portion and is replanted.

Introduction Carrot (Daucus carota L.) is a member of the Umbelliferae/Apiaceae family. Carrots is an important primitive cool season root vegetable crop cultivated in both tropical and temperate climatic conditions. Carrot is a significant winter root vegetable grown throughout India. Carrots are said to have originated in Afghanistan in western Asia, which is the principal source of variation. Carrots were grown in Asia Minor in the 10th and 11th centuries. It arrived in India from Persia in the 13th or 14th century. Its medicinal cultivation originated between 2000 and 3000 years ago. Carrots are a major root crop in European countries such as the United States, China, Japan, and India. Uttar Pradesh, Punjab, Haryana, Bihar, West Bengal, Assam, Karnataka, Tamil Nadu, and Rajasthan are the main carrot-growing states in India. During 2020-21, India produces 1885 thousand metric tonnes of carrot from 108 thousand hectares of carrot production. During 2020-21, Haryana ranked top in both area (19.83 thousand hectares) and production (337.43 thousand metric tonnes) of carrot in India (Anonymous, 2020). Carrot possesses antidiabetic, cholesterol and cardiovascular disease decreasing, anti-hypertensive, hepatoprotective, Reno-protective, and anti-inflammatory effects. Carrot roots are rich in carotene, iron, thiamine, riboflavin, ascorbic acid, niacin, and sugar.

Radish, turnip, carrot and beet root are major root crops grown in the country.  In addition, root crops like rutabaga, parsnip, salsify, chervil and celeriac are grown in a limited scale in different areas. Though the crops belong to different families, their cultural requirements are uniform.  Common features of root crops like radish, turnip, carrot and beet root are:

Improved Varieties of Root Crops

A. RADISH

A. Asiatic/Tropical Varieties

Carrot, radish, turnip and beet root are major root crops grown in India. In addition, root crops like rutabaga, parsnip, parsley, chervil and celeriac are grown in a limited scale in different parts of the world. There are several other roots and modified underground plant parts that grow in forests and consumed by tribes, but they are not commercially cultivated. Carrot, radish, turnip and beet root are generally consumed as cooked vegetables or fresh salads or as pickled vegetables.

5.1. Carrot

Carrots belong to the Umbelliferae family, named after the umbrella-like f lower clusters that plants in this family produce. As such, carrots are related to parsnips, fennel, parsley, anise, caraway, cumin and dill. Carrot, Daucus carota L. is believed have been primarily originated in Afghanistan, South western Asia and Mediterranean region. Daucus carota ssp. Carota is the most common wild form in Europe and South West Asia, and the present day cultivated carrots have most probably originated from this sub-species.

Haryana, Andhra Pradesh, Punjab and Tamil Nadu, Karnataka, Uttar Pradesh and Assam are the major producers of carrot in India.

Cultivars/Varieties: Varieties with long, orange coloured and smooth roots are preferred in India. Both indigenous and exotic varieties having different root length, shape and colour are grown. Temperate or European type varieties are Nantes, Half long, Early Nantes, Chantenay, Chaman, Pusa Yamadagni and Ooty-1, which require low temperature of 4-8°C for flowering. Tropical or Asiatic type varieties do not require low temperature for flowering and can be grown in plains also. The varieties belonging to this group are Pusa Kesar, Pusa Meghali and Hisar Gairic. Some varieties like Gold King, Indian Kuroda and Super Kuroda are also marketed by private seed companies.

Radish, turnip, carrot and beet root are the major root crops grown in the country. In addition, root crops like rutabaga, parsnip, salsify, chervil and celeriac are grown in a limited scale in different areas. Though the crops belong to different families, their cultural requirements are uniform. The common features of root crops like radish, turnip, carrot and beet root are:

• In all root crops, the tap root and a portion of hypocotyl develop into fleshy root.
• All root crops are cool season crops and are the best grown during winter in plains and spring-summer in hills of North India
• All crops, except beet root, exhibit two distinct groups, viz., tropical or Asiatic or annual types and temperate or European or biennial types. In beet root, tropical annual types are not available.
• Seeds of annual types are produced in plains. Biennial types require a chilling temperature, after attaining or completion of vegetative phase, for transforming to reproductive phase. Since this chilling temperature is available during winter at high altitudes, seed production of biennial types are practiced only in hills of North India.
• All root crops require well drained loose and friable soil without any clods for raising a good crop. Seeds are sown on ridges or on raised beds for proper development of roots.

Roots: The main distinguishing characteristic of roots is their high moisture content, which may vary from 75 to 90 percent. Their CF content ranges from 4 to 13 percent. The organic substance of the root is highly digestible and mostly composed of sugars (50-70% DM). Glucose and sucrose is the primary sugar. Although the CP content of roots is often low, the rumen’s protein degradability is extremely high (80-85%). Mangles, swedes, turnips, carrots, sugar beets and fodder beets are among the most popular root crops used to feed farm animals. Although sugar beet is a significant root crop, it is typically not fed to animals as such because it is cultivated largely for its sugar content. Nonetheless, sugar beet pulp and molasses (from both sugar beet and sugarcane) are significant and nutrient-dense animal products that are by-products of the sugar extraction companies. Although pigs are fed roots with higher DM concentrations, like fodder beet, they are not a favourite diet for pigs or poultry due to their bulkiness.
1. Swedes and turnips: Turnips (Brassica campestris) & swedes (Brassica napus) share a lot of chemical similarities, but turnips typically have less DM than swedes. Glucose and fructose are the primary sugars found.
2. Turnip (Brassica rapa): Turnips are root vegetables of cruciferous family. They are usually grown in temperate climates. Humans like a smaller variety, while animals are provided a larger variety. It has 8–10% DM, 12–13% CP and 75–80% TDN. Cultivars with yellow flesh have higher protein content than those with white flesh. Instead of passing through the animal, the volatile material that taints milk is absorbed by the milk from the air. Both turnips and swedes can taint milk if they are offered to dairy cows during or just before milking time.

Rootstocks play a very important role in propagation of plants, It may modify form or stature and adopt a variety to a soil in an incompatible climatic condition and also build up the resistance to biotic and abiotic stresses and meanwhile increase the production and productivity.

Vagaries of climate and mismanagement of soil have resulted in abiotic stresses, which in turn have lowered yield and quality production of fruits. In the course of its phylogenetic development, several fruit crops have developed various physiological and morphological mechanisms enabling plants to survive under adverse conditions. In case of fruit crops, one of the most important methods is to use rootstocks to overcome such stress conditions. However, over the years in fruit crops, the rootstocks that are present do not cater to the present day needs of pest and disease tolerance. Hence, there is an urgent need to widen the genetic base of rootstocks in different fruit crops by breeding and selecting rootstocks with desirable characteristics. It is acknowledged that the timing and intensity of the response of rootstocks to soil and atmospheric conditions are synergistically beneficial in evolving new cultivars.

Number of attempts has been made in rootstock improvement programmes all over the world. One of the methods that are being followed in perennial crops like mango is the development of large progeny population through half sib families. In this case, the female parent is common and open pollinated progeny population of varieties, in which improvement is sought, is used. Rootstocks were first used in European vineyards in the late 1800’s to combat devastating Phylloxera outbreak. Rootstock can be used to improve vigor, production and help to sustain the health and survival of fruit crops

Rootstocks play an important role in the propagation of plants. It may modify form or stature, adapt a variety of a soil, fit in an incompatible climate, impart or resist disease to the scion, increase production, hasten maturity of crop, change the colour of the fruit, effect the flavour of the fruit, shorten life of the tree, increase the size of the fruit, develop vigour, effect salt tolerance and influence storage capacity.

The rootstocks are known to have a profound effect on the vigour, productivity, precocity, fruit quality and tree longevity of scion varieties grafted or budded onto them. They also influence the susceptibility of scion trees to various diseases and pests. It is well recognised that optimum performance of scion varieties depends on the proper selection of rootstocks for a given set of agro-climatic conditions. To achieve success in orcharding, always select a right type of rootstock for the particular fruit or variety. In addition, it is important to raise the stock seedlings in a proper manner so that there is good germination and the stock seedlings are ready for budding/grafting in the shortest possible time. Rootstock seeds of desired fruits and varieties must be ensured from reliable sources.

Introduction

• At present, horticulture is recognized as a potential sector to enhance agricultural production, improve house hold nutritional security and income generation through diversification and employment, value addition and export.

• Inspite of the enormous success achieved in horticulture sector, several constraints still exist.

• Besides new emerging challenges, poor productivity per unit area continues to be a concern in most of the horticultural crops with climate change impacting the productivity further.

3.1 Role of root stock in fruit crops

• The role of rootstocks and its use in different fruit crops has significant impact on fruit crop production by influencing canopy architecture, nutritional uptake, flowering, yield and fruit quality.

• Besides, it can also confront biotic and abiotic stresses such as soil pathogens, thermal stress, salinity and nutritional stress.

• Due to limited availability of arable land and high market demand for fruit crops, they are frequently cultivated under unfavorable soil and environmental conditions like thermal stress, drought, flooding, salinity and contamination of organic pollutants.

• One way to substantiate or reduce these losses in production would be the use of appropriate rootstocks, which are capable of reducing the effect of external stresses on the scion.

• Rootstocks have a primary role in determining orchard efficiency.

• They are responsible for water and mineral uptake and provide anchorage for the tree.

A family of approximately 91 genera and 4,828 species which are cosmopolitan in distribution but particularly abundant in Eastern Asia, North America and Europe. About 25 genera and 230 species of Rosaceae have so far been reported from India. Some of the largely represented genera along with their common names and approximately reported species include Potentilla (Cinquefoil, 500), Prunus (peach, plum, almond, cherry, apricot, 430), Rosa (Rose, 250), Rubus (Raspberry, blackberry, 250), Alchemilla (250), Crataegus (Hawthorn, 200), Sorbus (Chokeberry, 250), Acaena (100) and Spirea (100). Named after the universally famous flowering plant, rose, the Rosaceae show great diversity in types of fruit (Fig. 48.1).
Roses, universally acclaimed as the ‘queen of flowers’, have played major role in human culture and artistry from ancient times. Among the ornamentals, roses occupy very important position both as garden plants and cut flowers for their beauty and fragrance. This unique position is attributed to great amount of variation in flowers and plant characteristics as well as their wide adaptability to varied agro-ecological conditions. Damask rose (R. damascena) and Edouard rose (R. bourboniana) are cultivated for extraction of essence, rose attar or rose oil, otto and other products, gulkand, gulab jal and pankhuri from petals. Rose oil has a significant place as an ingredient in pharmaceutical preparations viz., ointments, lotions, perfumes, creams and soaps and in food products including beverages, baked foods, puddings and frozen dairy desserts. Characteristics of damask rose oil as anti-HIV, anti-bacterial and anti-oxidant have been established.

1) Powdery mildew
Diagnostic Symptoms
• A white, powdery fungal growth on the upper, lower or both leaves and shoots.
• There may be discolouration of the affected parts of the leaf, and heavily infected young leaves can be curled and distorted.
• Mildew growth may also be found on the stems, flower stalks, calyces and petals.
• Heavily infected flower buds frequently fail to open properly.
• Mildew growth on stems and flower stalks is usually thicker and more mat-like than that on the leaves.
• Mildew growth on all parts may turn browner as it ages (Fig-1).

Hard Red scale: Aonidiella aurantii :Diaspididae

Both adults and young scales suck the sap from the stem and cause spot yellowing and loss of vigour of the plant. Infested shoots bear reddish brown encrustations of the scale and in case of severe damage the shoots dry up.

Rose the ‘Queen of flower ’is undoubtedly the world’s most favourite and popular romantic flower. It occupies a prestigious position in cut flower industry and as a garden plant. For thousands of years, the rose has been a symbol of love, adoration, innocence and all other virtues. Countries like England adopted rose as their national flower. In India, rose adorned the gardens of not only the rich and the famous, but also the ashramas of the saints. Rose cultivation initially developed with the distillation of rose for essential oil. Today the importance of rose is in its value as a cut flower. It is one of the most important commercial flowers throughout the world. Roses are also used for preparation of rose water and ‘Gulkhand’ 

Modern rose (Rosa × hybrida) belongs to family Rosaceae. Rose is derived from Greek word “Rhedon” means fragrance. From the ancient time its beauty and attractiveness drag the attention of breeders to create new colours and types. Present cut roses are complex hybrids developed through interspecific hybridization, polyploidy with male and female sterility and these heterozygous genotypes are propagated vegetatively. Rose occupies the first rank among the cut flowers in international market and in India it occupied first position in cut flower export trade.

Modern rose (Rosa x hybrida) belongs to family Rosaceae. Rose is derived from Greek word “Rhedon” means fragrance. From the ancient time its beauty and attractiveness drag the attention of breeders to create new colours and types. Present cut roses are complex hybrids developed through interspecific hybridization, polyploidy with male and female sterility and these heterozygous genotypes are propagated vegetatively. Rose occupies the first rank among the cut flowers in international market and in India it occupied first position in cut flower export trade.

ORIGIN AND DISTRIBUTION

Roses have been in cultivation since the origins of civilization (Wylie, 1955). The evidence of rose cultivation is found about 5000 years ago in ancient civilization of China, western Asia and northern Africa (Shepherd, 1954). About 120 known wild species, all indigenous to temperate regions of northern hemisphere have been reported to be growing. Eleven species are reported to be growing wild in India. Among the rose species used for perfume extraction purpose Rosa alba originated perhaps in Crimea in Russia, R. borboniana originated in Isle of Reumon in 1817, R. centifolia is native to eastern Caucasus and is under cultivation since 1596. Original home of R. damascena is unknown and it was introduced to Europe from Damascus in Asia Minor during the sixteenth century. R. moschata is native to Middle East and Himalayas and is found at altitudes ranging from 1000 to 4700 meters extending from Europe. The Persian Musk, one of the forms of R. moschata is very common in India. It was introduced into England in 1599. Rosa gallica, known as French rose is native to central and southeast Europe and is in cultivation prior to 1542.

Significant information about roses in antiquity can be seen in the writings of the Greek historian Herodotus (490-420 B.C.), the Greek philosopher Theophrastus (372-287 B.C.) and the Roman naturalist Pliny (23-79 A.D.).

Originally all roses grew wild. About 120 known wild species of roses, all indigenous to the temperate regions of the northern hemisphere, have been reported. The species growing wild in India are Rosa brunonii (Himalayan Musk rose), R. eglanteria, R. gigantea (syn. R. odorata var. gigantean), R. involucrate (syn. R. clinophylla), R. leschenaultiana syn. R. sempervirens, R. longicuspis, R. macrophylla, R. moschata (Musk rose), R. rubiginosa (Sweet Briar, Eglantine rose), R. walpoleana, R. sericea (Ladakh rose). Till the nineteenth century only four species, R. gallica (Red rose), R. canina (Dog rose), R. moschata (Musk rose) and R. phoenicia (Phoenician rose) played a role in the development of cultivars grown at that time.

INTRODUCTION

The rose is one of the oldest flowers in cultivation and most popular of all garden flowers throughout the world. It is one of the nature’s beautiful creations and is universally known as the Queen of Flowers.

Th e cultivation of th is f lower h as developed with the distillation of rose as mentioned in Ayurveda by Charaka around 100 A.D. At present, it has become the most important commercial flower. A large quantity of rose flowers is used for decoration purpose. Beside, it has been growing for centuries for the extraction of its essence. The rose water is frequently used for flavouring sweets and other food articles as well as for sprinkling over guests on festive occasions. Hips of some rose species are rich in vitamin C while its petals are used for preparing Gulkand and Pankhuri.

Domestic demand for roses has two components; the demand for stemless roses supplied by field grown roses and demand for stemmed roses, mainly grown under protected conditions. In most parts of India, rose flowers throughout the year, in a succession of flushes of blooms, without having any true dormant period. Good quality blooms are produced in winter when local market demand is good. There is a growing demand of value added floral extracts in world market, hence there is great scope for commercial cultivation of rose for production of floral extracts.

The fragrance of rose is said to be the only fragrance that never tires the human olfactory system. Export of rose water started in 8^th century from Iran and later in 9^th century from India and China, mostly to Arabian countries. Rose cultivation was introduced as an industry in Turkey in 17^th century and later spread to other countries like Egypt, Morocco, France, China, India, etc. About 80% of rose flower are utilized for rose water, 10% for attar, 1 to 2% for pankhuri and remaining for manufacture of gul-rohan and gulkand. Rose oil is used primarily as a fragrance component in pharmaceutical preparations e.g. ointments and lotions and is extensively used as a fragrance ingredient in perfumes, creams and soaps. Food products in which they are used include beverages, frozen dairy desserts, sweets, baked foods, gelatins and puddings.

Rose is most popular of all garden plants and regarded as queen of the flowers. Various colours, forms, fragrance of the flowers are major attraction. Roses are generally grown as bedded plants but can successfully be grown in pots also. Therefore, those who do not have land for bedding purpose may grow them in pots. Every kind of garden has scope for growing roses in various forms. In home garden, growing roses is always preferred. A single bloom of rose creates a tremendous sensation and enjoyment to the house owner. Similarly, public parks, institutional, factory and temple gardens have equal scope for growing roses in beds. There are large numbers of cultivars available in the horticultural trade and one has to select them depending upon the garden type, climatic conditions and purpose of the garden.

Species and Cultivars

Rose (Rosa sp.) is a woody perennial belongs to the family Rosaceae. There are about more than 100 species having varied growth habit ranging from erect shrub to climbing and miniature. Similarly, flowers have different forms, size, colour and fragrance. Majority of the species are native to India while a smaller number is native to Europe, North America and northwest Africa. Species found in India are - Rosa clinophylla (R. involucrata), R. foetida, R. gigantea (R. odorata var. Gigantea), R. leschenaultiana, R. moschata, R.macrophylla etc.

For development of garden roses, following eight species had main contribution as parental species - Rosa chinensis, R. damascena, R. foetida, R. gallica, R. gigantea, R. moschata, R. multiflora and R. wichuraiana. Inter-species crosses between Chinese roses and European started the development of modern roses.

Abstract: Rose is a popular cut flower and flowering garden plant. Fragrance, wide colour range, plant forms and wide adaptability make it a versatile floriculture crop. The diagnostic traits of the different classes are described with reference to their potential commercial value. Increasing genetic information and trait heritability has been established for this crop and molecular genetic techniques are valuable tools aiding modern rose breeders, cultivars are almost exclusively asexually propagated. A gametophytic self incompatibility is found within this species. Numerous cultivars developed through hybridization and mutation techniques are discussed. Rose breeding efforts have been focused on miniature forms, floral fragrance, recurrent blooming, diverse colours, thornlessness, potential rootstocks, mutilple disease, pest resistance and winter hardiness. Transgenic research is highlighted. The journey of rose is endless and rose breeding may continue forever.

Keywords: Rose, intervarietal hybridization, mutation, inheritance, self incompatibility, rootstock, seed production, genetic transformation.

Introduction

The rose is one of the oldest flower in cultivation and rank 1^st position worldwide as cut flower. There are two types of roses; first stemless rose supplied by field grown roses for making garlands or extraction of rose oil or rose water. Second is stemmed rose, which is mainly grown under protected conditions for cut flower production used for making bouquets or interior decoration.

The cultivation of this flower has developed with the distillation of rose as mentioned in Ayurveda by Charaka around 100 A.D. At present, it has become the most important commercial flower. A large quantity of rose flowers is used for decoration purpose.

Rose (Rosa x hybrida L.) is the most beautiful creations of nature and is commonly known as queen of flowers. It occupies first position in the international trade. Rose is known for its beauty and is used in worship, bouquets, cut and loose flowers, preserves, garlands, decorations, landscaping, etc. It has gained wide acceptability due to varied growth habits, beautiful shape, dissimilarity in size and form, attractive colour, pleasant fragrance and abundant varieties. These can fulfill the requirement of climbers, trees, hedges shrubs, and edges in the landscape gardening. Commercial products of rose such as rose water, rose attar, gulroghan, gulkand, rose dry petals, rose oil, etc play a vital role in international and national market. Rose hips are one of the imperative sources of Vitamin C and are used for preparation of rose tea. With the ever-increasing demand of novel varieties in the world trade, a large number of varieties are being bred every year with many novel traits. Its share is around 51 per cent of the whole of European markets. In India, 29.41 thousand ha area, producing 301.95 thousand MT is under rose cultivation in the states of West Bengal, Karnataka, Gujarat, Chhattisgarh, Maharashtra (NHB database, 2017). Cultivation of rose such as Rosa damascena, R. bourboniana, R. centifolia is also done for essential oil extraction from rose petals.

Origin and Taxonomy

Rose belongs to the family Rosaceae. The genus is divided into four sub genera of which sub genus Rosa includes nearly all the species (Gudin, 2000). The sub genus Rosa is further divided into different sections of which the actual number is arguable. There are about 100 to 300 species in rose based on various reports. The rose genome is complex consisting of five haploid chromosome sets each made of seven chromosomes. (Nybom et al., 2005). The chromosome number of wild species varies from 2n = 2x=14 to 2n= 8x=56, with most of the species being diploid or tetraploid (Nybom et al, 2005). Rosa x hybrida L. is not a species in botanical terms, however, is a highly complex artificial species (Gudin, 2003) that may be used to describe the modern rose cultivars.

All varieties of rose are susceptible to this disease. It is an important disease of rose which causes a sharp reduction in number and size of fl owers.

8.1. Origin and distribution

• Native of Mediterranean regions of Europe, Asia Minor and North Africa.

• Grown in Spain, Italy, France, Algeria, Morocco and Portugal for its essential oil.

• Cultivated to a limited extent in Nilgiris in South India.

8.2. Economic importance

• Economic part - leaves and flowering tops

• Oil is valued for its use in culinary, medicine, perfumery and cosmetic industries.

• Excellent fixative material and oil also contributes a strong fresh odour

• Also serves to mask unpleasant smell.

• Rosemary oil - antimicrobial activity against certain gram positive and gram negative organisms.

English name : Rosemary
Botanical name : Rosemarinus officinalis L.
Family : Lamiaceae
Chromosome number : 2n = 24
Centre of origin : Mediterranean region
Rosemary, botanically classified as Rosmarinus officinalis L. of the family Lamiaceae (Labiatae), is widely recognized as a culinary herb. When subjected to steam distillation, the leaves and flowering tops yield an essential oil. The name “rosemary” is believed to be associated with the Virgin Mary, as reflected in one of its Spanish names, romero, meaning “pilgrim’s flower.” This association further underscores its connection to the Virgin Mary. Dried rosemary leaves comprise approximately 5.7% moisture, 4.5% protein, 17.4% fat, 19% crude fibre, 47.4% carbohydrates, and 6.0% ash. Additionally, they are rich in minerals and vitamins, containing 1.5% calcium, 0.70% phosphorus, 0.03% iron, 0.004% sodium, 1.0% potassium, 175 IU of vitamin A per 100 g, 0.51 mg of vitamin B, 0.04 mg of another B-vitamin, 1.0 mg of niacin, and 61.3 mg of vitamin C per 100 g, with a caloric value of 440 calories per 100 g.

A rotavator, also known as a Rotary Tiller, is a tractor-powered tillage tool used for oil cultivation. It works by cutting, mixing, and pulverizing the soil through a series of rotating blades. This tool is an affordable and efficient option for seedbed preparation and can replace equipment like disc harrows, cultivators, and levelers.
The rotavator features spinning blades that break through the soil, powered by the tractor’s PTO. It increases soil structure by breaking up clods, improving water absorption, and eliminating weeds and crop residue. Compared to a plough, a rotavator allows farmers to prepare land for sowing in fewer passes. As a powered machine, it ensures optimal soil conditions while helping to control pests and prevent crop diseases.
A rotavator or a rotary tiller is one of the most efficient tools used in modernday agriculture. It uses rotating blades and advanced machinery to pulverize the soil. According to several case studies, rotavators are considered one of the best economical and effective tools for soil bed preparation.

INTRODUCTION

Wheeler bearers commonly referred to as ‘Rotifers ‘are significantly they are often taken as reliable indicators of mesotrophic characteristics in the lake ecosystems (Gannon and Stemberger, 1978). Because of their wide tolerances to varied dissolved oxygen levels and temperature distributions, they are even found to inhabit the deeper waters of aquatic ecosystems (Esparcia et al., 1989). They belong to the Kingdom Animalia, Subkingdom Eumetazoa, Phylum Rotifera (Cuvier, 1798) having three classes Monogononta, Digononta and Seisonidea (Pennak 1953). In other words these wheel animalcules named, because of the presence of their corona, which is composed of several ciliated tufts around their mouth region. This ciliated tuft helps in locomotion and resembles a wheel. These create a current that sweeps food into the mouth, where it is chewed up by a characteristic pharynx (called the mastax) containing a tiny, calcified, jaw-like structure called the trophi. The cilia functions to pull the animal, when unattached, through the water. Most free-living forms have pair of posterior toes to anchor themselves while feeding. Rotifers are bilaterally symmetrical found in various shapes. There is a well-developed cuticle, thick and rigid, providing a box-like shape, or flexible, giving the animal a worm like shape; such rotifers are respectively called loricate and illoricate.

Habitats of Rotifers are relatively easy to find. Many live in ponds, moist soil, or any stagnant water. Rotifers can be free swimming or sessile. Rotifers are mostly omnivorous and some have been observed to be cannibalistic. They normally eat algae or decomposing organic material. As they are a major food source for Cladoceran , Copepodans , juvenile fishes (fry) and fishes, therefore , an important food link of water ecosystem (Arora and Mehra 2003). Presence of abundant Rotifers in freshwaters determines them to be one of the main groups of zooplankton in limnological studies. They are permanently and obligatorily connected to aquatic habitats in all active stages and only their resting stages are drought-resistant (Chopra et al 2012). Various researchers have conducted pioneer study on the diversity and habitat of rotifers such as Anderson 1889; Sharma 1987; Sharma 1998a; Gilbert and Schreiber 1998; Arora and Mehra 2003; George et al. 2011; Tyor and Chawala 2012. However such studies on Madhuganga dam water has not been conducted, hence for assessment of Madhuganga Lentic water has been conducted for the seasonal variation in diversity and density of rotifers.

Abstract
    
The amount of data being collected across a wide variety of fields today far exceeds our ability to reduce and analyze without the use of automated analysis techniques. In addition, the whole data may not be of user interest and imperfect. Therefore, it is very challenging to organize this data in formal system, which provides outputs in more relevant, useful, and structured manner. There are many techniques available to retrieve knowledge from this voluminous data. This paper discusses different rough computing based information retrieval techniques to obtain meaningful knowledge from large amount of datasets. We also discuss a real life example to show the viability of proposed research.

Seen in mature chickens. Condition results from myocardial degeneration which causes bilateral ventricular hypertrophy and dilation. Etiology is not known.

Round heart disease in turkey causes mortality in 1-4 weeks of age. Lesions are severe cardiomyopathy, ascites, hydropericardium and generalized congestion of tissues. No aetiology is known.

Routine maintenance forms the foundation of effective and sustainable aquarium care. It encompasses a range of scheduled activities designed to maintain cleanliness, chemical stability, and a healthy environment for aquatic life. Whether managing a small home tank or a large public display, failure to perform regular upkeep can cause water quality to deteriorate quickly, potentially leading to stress,
illness, or even the death of fish and plants.
Common maintenance routines include partial water changes—typically 10–30% on a weekly or biweekly basis—along with cleaning the substrate and tank decorations to remove waste and leftover food. Filters should be regularly inspected and cleaned to maintain proper flow and filtration. Additionally, both the inner and outer surfaces of the glass should be cleaned to eliminate algae and ensure clear viewing.
Water testing is another critical aspect of maintenance. Key parameters like ammonia, nitrite, nitrate, pH, temperature, and oxygen levels should be routinely checked using appropriate test kits. Identifying imbalances early helps prevent serious water quality issues.
Health monitoring of fish and plants is also important. Watching for changes in behavior, eating habits, color, or signs of distress enables early diagnosis and treatment. For planted tanks, this might include trimming overgrowth, replanting, or adding fertilizers as needed.
Sticking to a consistent maintenance schedule not only keeps the tank clean but also extends the life of your aquarium’s inhabitants and equipment. It supports a stable and thriving aquatic environment where natural biological cycles can operate effectively.

INTRODUCTION TO ROUTINE MAINTENANCE PROCEDURES FOR AGRICULTURAL DRONES
Regular maintenance of agricultural drones is crucial for their best performance and durability, as these sophisticated devices are integral to contemporary agriculture. Agricultural drones endure severe climatic conditions, such as dust, wetness, and fluctuating temperatures, which might impact their performance. Routine maintenance activities, including cleaning, inspecting, calibrating sensors, and assessing component wear, mitigate expensive downtime and guarantee that drones consistently provide accurate data for applications such as crop monitoring, irrigation management, and pest control. By following a regular maintenance schedule, farmers may optimize the dependability and effectiveness of their drone technology, so improving production and reducing the likelihood of malfunctions during essential activities.
UAV systems (drones) necessitate routine maintenance inspections to verify optimal functionality. They are susceptible to deterioration from prolonged usage, particularly when utilized within a bigger fleet.
This checklist may be utilized as frequently as necessary for routine maintenance inspections; however, it is more efficacious to conduct maintenance on a per-flight basis rather than at fixed intervals. Scheduling will more precisely indicate the likelihood of the drone requiring maintenance.
You likely already possess established procedures for determining when and how to conduct maintenance. Verify all items on this list to confirm their operational status and facilitate any required repairs or replacements prior to the next flight.

Routine paraffin wax embedding technique can be conveniently discussed under the following five headings:
Stages of tissue processing
1. Fixation: Stabilizes and hardens tissue with minimal distortions of cells
2. Dehydration: Removal of water and fixative from the tissue.
3. Clearing: Removal of dehydrating solutions, making the tissue components receptive to the infiltration medium.
4. Infiltrating: Permeating the tissue with a support medium.
5. Embedding: Orienting the tissue sample in a support medium and allowing it to solidify.
Fixation-A
It is essential that tissues be fixed as soon as possible after death or removal from the body, and for this reason screw-capped specimen jars containing appropriate fixatives should be permanently kept wherever tissues for histological examination are taken regularly, for example in the operating theatre, the post- mortem room, or the animal house. The amount of fluid in the jars should be 15-20 times the bulk of the tissue to be fixed. Care should be taken to ensure early despatch of the specimens to the histology laboratory in order to avoid over-fixation in intolerant fixatives.
Tissues selected for sectioning should be sufficiently thin to be adequately fixed throughout in a reasonable time. The overall bulk of the tissue determines the volume of fixative required; the thickness will determine the speed of fixation.

INTRODUCTION

Rubber cultivation in regions extending from 10°N to 10°S latitude is known as the traditional region and the areas other than its natural climatic origin is termed as the non-traditional region. Northeast India comprises majority of the non-traditional areas in India with major climatic constraints like high seasonal rainfall, excessive precipitation and to some extent dry conditions. These areas extending from 22 to 29^°N latitude, holds promise in extending rubber cultivation because of its exceptional climatic make-up and abundant amount of annual precipitation (2000 mm) distributed over a fair period of time.

This perennial crop generally yields latex rubber at the 7th year after planting (with an economic life span of 20 years), although the period (immaturity period) it requires, is higher in the non-traditional region (Rubber Growers Companion, 2006). This immaturity period has also been shown to reduce with water availability in sub-humid climates (Vijayakumar et al. , 1998). Harvest of this crop is by tapping. Tapping is a process of controlled wounding during which thin shavings of bark are removed, thus opening the latex vessels which exude latex. Dry rubber yield is obtained after the latex is coagulated and rolled into sheets (about 500gm) which is then smoked and dried.

5.1. Origin and distribution

• Indigenous tree of tropical rainforest of Amazon basin of Brazil and introduced in Asia in 1876

• Malaysia, Indonesia, Thailand and Africa are the main rubber producing countries.

5.2. Economic importance

• Natural rubber is available from Manihot glaziovii (Cera rubber), Ficus elastica (India rubber), Castiolla elastica (Panama rubber), Parthenium argenatum (Guayul), Taraxacum koksaghyz and Hevea brasiliensis (Para rubber).

• Hevea brasiliensis is the most important commercial source of natural rubber.

• After proper chemical treatment, rubber wood provides enough strength and durability of any semi-hard wood available in India

• U sed for the manufacture of useful articles like door and window components, furniture, wall paneling, interior decoration, tool handles etc.

Natural rubber, cis-l,4 polyisoprene, produced in the milky cytoplasm (latex) of specialized cells called laticifers in certain plants is one of most important biological macromolecules, which is used as an industrial raw material for the manufacture of a variety of products. Natural rubber is found in the latex of over 2000 species of plants belonging to 311 genera under 79 families. However, Hevea brasiliensis, also known as Para rubber tree after the Brazilian port of Para, is the only commercial source of natural rubber mainly because of its abundance in latex, quality and convenience of harvesting. Hevea was first used as a source of rubber by the French.

Botanical Name: Hevea brasiliensis
Family: Euphorbiacace
Origin: Brazil
Chromosome No.: 36
Useful Part: Latex 
Cera Rubber: Manihot glaziovii
Para Rubber: Hevea brasiliensis
Indian Rubber: Ficus elastic
Panama Rubber: Castiolla elastic
Guayul Rubber: Parthenium argentatum

Rubber (Hevea brasiliensis) is a tropical tree crop of industrial importance which is mainly cultivated for its latex. It is also known as ‘Para Rubber’ tree, a commercial source of natural rubber. Rubber latex is a milky white liquid, a suspension of rubber particles (cis-1,4–polyisoprene) known for its elastic properties produced in specialized cells called laticifers which have to be coagulated to obtain the rubber. Rubber was introduced by the British in India for commercial cultivation and became an established industry. The rubber industry is divided into two sectors: tyre and non-tyre of which automotive tyre sector is the single largest sector of rubber consumption.

The natural habitat of rubber (Heavea brasiliensis) is rain forests of the Amazon basin, situated within 5° North and South at altitudes below 200m. The climate of this region is equatorial monsoon type characterized by mean
monthly temperature by 25 to 28°C, well distributed rainfall and no marked dry weather. Though it is originated in the Amazon basin, it is now predominantly grown in the tropics where an equatorial monsoon type climate prevails. Regions between 8°N and 10°S which includes Indonesian archipelago, Malaysia, southern part of Sri Lank  and some other Islands, are better suited to rubber cultivation. The production of natural rubber in the country was 8.65 lakh MT in 2008–09, registering a 4.74 per cent growth compared to the previous year. India is the fourth largest producer of natural rubber with a share of eight per cent in the World after Thailand, Indonesia and Malaysia and the fourth largest consumer of natural rubber after China, USA and Japan. Among the rubber growing countries in the World, India occupies a pride place with the top most position in productivity (Table 9.1). The productivity of natural rubber (NR) in India in 2009–10 was 1784 kg/ha. In 1950–51, it was 284 kg/ha. The growth achieved in terms of the productivity of natural rubber is 628 per cent. This achievement

A family of about 611 genera and 13,150 species, Rubiaceae are chiefly distributed in tropics, but some are distributed in temperate or even arctic regions. About 75 genera and 275 species have been reported from India, chiefly in tropical and sub-tropical eastern Himalayas. Some of the largely represented genera with their approximately reported species (Hickey and King, 1988) include Psychotria (700), Galium (400), Ixora (400), Gardenia (250), Mussaenda (200), Asperula (200), Cephaelis (180), Rondeletia (120), Coprosoma (90), Guettarda (80), Rubia (60), Coffea (40) and Cinchona (40). Two most important plants of the family are Coffea arabica (coffee-yielding plant) and species of Cinchona (quinine-yielding plant).
Economic Importance of Selected Genera and Species
Some of the common ornamental plants grown in gardens and roadsides include Anthocephalus cadamba (Kadam), Cephalanthus occidentalis, Galium verum (Ladies Bedstraw), Gardenia jasminoides (Jasmine), Hamelia patens, Hamiltonia suaveolens (Padera), Ixora arborea, I. coccinia, Morinda tinctoria, M. frondosa, M. luteola, Pentas lanceolatea and Rondeletia.

The process of civilization and materialist life style has forced man to make laws which govern or rule the conduct of the people of society or community. In the earlier days the relation of human and animal was interdependent and mutual. Now a days man has become self-centered and ignorant of his surroundings. This has led to cruelty on the animals in many circumstances. Therefore, in pursuit of prevention of the cruelty to animals following laws, regulations have made by the government.

Principle

Polyethylene glycol (PEG) is a high molecular weight compound which is inert to rumen fermentation. The concentration in the rumen liquor declines with the passage of digesta from rumen to lower G.I. tract and is proportional to time. Protein free filtrate of rumen liquor gives turbidity in the presence of trichloro acetic acid and barium chloride which is a measure of PEG concentration at different post feeding hours.

Ruminants have evolved to consume and subsist on roughage - grasses and shrubs built predominantly of cellulose.The rumen is a fermentation vat par excellance, providing an anaerobic environment, constant temperature and pH, and good mixing. Well-masticated substrates are delivered through the esophagus on a regular schedule, and fermentation products are either absorbed in the rumen itself or flow out for further digestion and absorption downstream. Rumen gases, particularly methane, are increasingly in the news because of their contribution to greenhouse gas and climate change.

The ruminant stomach is composed of four parts; the rumen, reticulum, omasum and abomasum. These compartments gives the cow and other ruminants a decided advantage in digesting and utilizing those parts of the plants and other compounds which are practically useless to animals with simple stomach. Substances such as cellulose, a major constituent of plant tissues and urea, a non protein nitrogen compound, are of limited use of non ruminants. However ruminants through fermenting and synthesizing action of microorganisms in their complex stomach, can efficiently utilize these substances for productive purposes. The dairy cow converts this feed into milk and meat, two highly nutritious and palatable food for humans. This ability to make use of feed which otherwise would go waste because it is not directly consumable for humans is one of the most compelling justifications for the existence of cattle and buffaloes, in a world which must make use of all possible food resources.

Introduction

In ruminants,nutritional studies are very complicated unlike non ruminants where it is quite simple. In non-ruminants, analysis of feed taken and faeces voided by the animal gives overall picture of digestion and nutrient availability to the animal. In ruminants, since it has a complex microbial digestive system (rumen) within the animal digestive system, the analysis of the feed taken and faeces voided will not express the whole processes in the GI tract of the animal. To have complete picture, it is necessary to study at the site of microbial digestion (rumen). For such study, samples from the rumen have to be drawn and analyzed for metabolities, microbial enzymes etc.

A. Multiple choices (you have to choose most appropriate answer among 4 alternatives)

1.    Which of the following bacteria in rumen is not cellulolytic

a. Bacteroides succinogenes

b. Ruminococcus flavefaciens

c. Ruminococcus albus

d. Succinivibrio dextrinosolvens

2.    Which of the following bacteria does not interact with anaerobic fungi

a. R. albus

b. R. flavifaciens

c. Butrivibrio fibrisolvens

d. Fibrobacter succinogenes

Ruminitis is an inflammatory condition affecting the rumen wall, primarily caused by disruptions in the rumen’s microbial environment and metabolic processes. It is often linked to excessive consumption of rapidly fermentable carbohydrates, leading to rumen acidosis and subsequent damage to the ruminal epithelium. If untreated, ruminitis can progress to severe systemic complications such as liver abscesses and endotoxemia, significantly impacting animal health, productivity, and profitability in livestock systems. Nutritional management plays a central role in both preventing and treating ruminitis.
Causes
1. High-starch diets: Diets rich in grains and low in fibre promote rapid fermentation, leading to an overproduction of volatile fatty acids (VFAs) m and lactic acid, lowering rumen pH (rumen acidosis).
2. Low-fibre diets: Insufficient fibre intake reduces chewing and saliva production, which are essential for buffering rumen acidity.
3. Inconsistent feeding practices: Irregular feeding schedules or abrupt dietary changes disrupt microbial populations in the rumen.
4. Other factors: Overfeeding of easily fermentable feeds (e.g., silage or molasses), Stress or illness reducing feed intake and altering rumen function.

3.1 Runoff

Runoff is one of the important parameter of hydrologic cycle. It is defined as that portion of precipitation which is not absorbed by the deep soil strata but finds its way into the stream after meeting the demands of evapotranspiration, interception, infiltration, surface storage, and surface as well as channel detention. It includes surface runoff received into the channels after precipitation occurs, delayed runoff that enters the stream after passing through the land surface, and other delayed runoff from the temporarily detained pits, depressions, swamps or detained as snow fall. It is thus the flow collected from the drainage basin and appearing at the outlet of the basin. The runoff process is demonstrated in Fig. 3.1 as flow chart. Details of the runoff process are discussed as below.

Abstract
The growing youth population in developing countries, particularly in agriculturedominated economies, presents a demographic dividend that remains underutilized due to skill mismatches and unemployment. Despite agriculture engaging nearly 50% of the workforce, it is often stigmatized as a low-skill profession, necessitating up-skilling and knowledge enhancement to transform it into a profitable, modern enterprise. Government initiatives in India, such as PMKVY, Start-up India, Mudra Yojana, ARYA, and Student Ready, aim to foster skill development and agripreneurship to align with global market trends. This paper examines challenges in leveraging this demographic potential, including outdated interventions and societal perceptions, and proposes visionary reforms to enhance training, promote equity, and mainstream agri-preneurship for sustainable economic development.
Keywords: Agri-preneurship, Demographic Dividend, Skill Development, Unemployment, Government Initiatives, Agriculture, PMKVY, Start-up India, Mudra Yojana, Sustainable Development

Rural development has always been an important issue in all discussions pertaining to economic development, especially of developing countries, throughout the world. In the developing countries and some formerly communist societies, rural mass comprise a substantial majority of the population. Over 3.5 billion people live in the Asia and Pacific region and some 63% of them in rural areas. Although millions of rural people have escaped poverty as a result of rural development in many Asian countries, a large majority of rural people continue to suffer from persistent poverty.