eChapters

A. Mesta diseases

1. Anthracnose

Occurrence & severity status

Mesta (Hibiscus cannabinus) is very much prone to be attacked by anthracnose disease (Singh, 2014). It is very destructive disease in India (Ghosh, 1983). The disease also occurs in South Korea with overall disease incidence of 20%. (Kwon et al., 2015).

Symptoms

Symptoms on kenaf plants include dark brown spots on the leaves, petioles and stems. New leaves and shoots are most susceptible to infection (Kwon et al., 2015). Initially the terminal bud is attacked, where stipules and young leaves are affected and develop necrotic spots and withers (Singh, 2014). Mature lesions on fully expended leaves are dark brown and often irregular in shape, and not vein delimited. Later, the infected leaves fall off; Flowers and seed capsules are also affected by the disease (Singh, 2010). The stems are affected in patches. On stem the lesions are elongated and black, which later form cavities and in severe cases, stem-dieback or wilt occurs (Singh, 2010; Kwon et al., 2015).

5.1 Important Terms

i. Inoculum: The infective pathogen propagules coming in contact with the host constitutes the inoculum. The inoculum in the liquid state is a significant factor in anaerobic digestion in solid phase because it is very useful to convey the micro organisms, the water of recirculation. Depending on the particular inoculant formulation, the inocula can be used for seed coating, for dipping seedlings, direct application to the furrow, or as foliar application. An appropriate inoculum consists of copious amounts of active microbes having the potential to convert the organic matter to biogas and the S/I ratio is essential for the rate of degradation of a recalcitrant substrate since it governs not only the biogas composition, digestion period and reactor. Spread of inoculum may occur by wind, water, infected plant material, insects, animals, birds, and people. Plant diseases may have more than one source of inoculum. The infection cycle of some economically important soil-borne plant pathogens involves a combination of primary infection from particulate inoculum residing in the soil and secondary infection as disease is spread from infected to susceptible hosts.

The infectivity of inoculum can be quantified by the pathozone profile which measures changes in the probability of infection when inoculum occurs at different distances from the host. For instance, the germinability of inoculum, the growth of the mycelial colony and the infectivity of mycelium at the surface of the host combine to dictate the shape of the pathozone profile for Rhizoctonia solani on radish. The ultimate shape of the pathozone depended on inoculum type and was particularly sensitive to changes in the density and distribution of the mycelium in the fungal colony. Mycelium from an infected radish plant grew much further and at a higher density than that from particulate inoculum (mycelial discs). This results in pathozone profiles that differed in shape. For particulate inoculum the profile rise and fall with distance whilst for an infected plant the decay is sigmoidal.

Phosphorus (P) is the second most important essential nutrient limiting crop/ plant growth, next only to nitrogen (N). Phosphorus is an important component of nucleic acid like deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). It is needed for energy storage and transfer, which is the single most important essential function of P. Phosphate compounds act as “energy currency” within plants. The most important common P energy currency is adenosine diphosphate (ADP) and adenosine triphosphate (ATP). The ATP transfers energy for synthesis of ADP. Life is not possible without P. It is the source of energy that powers practically all energy-requiring biological processes in plants. Phosphorus is present in plant as phospholipid such as lecithin and cephalin which appears to be involved in the structural framework of protoplasm. Phosphorus is involved in many important processes such as photosynthesis, cell division, tissue development, and growth in plant. Requirement of P by the crops is less, compared to N and potassium (K). It is present in plant tissues. It is reported that for 5-6 t ha^-1 of wheat grain yield, it removes about 100-120 kg N, 20-30 kg P₂O₅ and 150-180 kg K₂O from soil.

Phosphorus is 11^th most abundant element on the earth crust. However, it is the least mobile element among the major plant nutrients. Its complex chemistry in soil makes it highly deficient nutrient element in most of the arable soils across the globe. Only 0.1% of the total P in the soil is available for uptake by plants because of its fixation as various insoluble compounds depending upon the soil pH. About 43% of the world’s arable soil is P deficient which limits crop growth and production (Roy et al., 2018). In the Indian context, about 80% of the soils are reported to have low to medium available P content (Muralidharudu et al., 2011). Thus, application of P-fertilizers to maintain the soil fertility and sustain crop productivity becomes imperative in today’s input intensive agriculture.

Keeping the medical, ecological and economical importance of nematode phylum in mind, it is remarkable to see that nematode systematics is far from established. It has a long history of constant revision and there may be as many classifications as there are nematode taxonomists. Ferris and Ferris (1987) anticipated about the growing sense of excitement pervading systematics as new techniques make it possible a depth of understanding of phylogenetic relationships and affinities never before thought possible. They further stated that Darwin’s ‘genealogical taxonomy’ based on the concepts of descent with modification, is linked directly with two approaches to phylogentic inference, viz., phonetics and cladistics. In both these, patterns of descent take precedence over processes and in classifications based on these procedures, ‘grades’ and ‘gaps’ beloved by the evolutionary systematics are ignored and categories are usually of lesser importance. The phonetic approach deals with ‘natural classification’ based on overall similarity and the belief that the more characters a classification is based on, the more reliable it will be.

9.1 General Description

Education can help farmers in impoverished nations move away from environmentally damaging slash-and-burn agriculture (Nganje et al. 2001). The goal of their study was to see how much extension education can help people embrace agricultural strategies other than slash and burn. In Cameroon, farmers' cropping patterns are modelled as a function of farm size, farmer educational level, and extension professional visits, whether slash and burn, varied crops, or monocropping. According to the data, higher extension visiting rates reduce not just the risk of farmers choosing slash and burn agriculture, but also encourage them to switch to monocropping. Because monocropping is a trend toward export-oriented agriculture in Cameroon, it may help to promote greater economic development in Western Africa (Nganje et al. 2001). Continued extension education activities are therefore vital in decreasing the environmental damage caused by slash and burn agriculture while also encouraging the adoption of more profitable cropping strategies.

The negative impacts of shifting cultivation on the environment as farmers strive to provide for higher populations and the associated decline of shifting cultivation into an unproductive system have led most governments in Southeast Asia to perceive it as a backward method of cultivation (Thanh and Vien 2017). Consequently, governments throughout the region have tried to ban shifting cultivation. In Malaysia, for example, huge development programmes have been implemented to improve shifting cultivators livelihoods when they abandon shifting cultivation (Majid, 1983). The government of Laos has enacted land-use and forestry policies aiming at expanding forest cover, eliminating shifting farming, and supporting intensive commercial agriculture (Castella et al., 2013). For many years, the Vietnamese government has implemented strict rules and procedures to combat shifting cultivation. These include a large-scale programme called 'Fixed Cultivation, Fixed Residence' (officially known as Resolution No. 38/CP), which aims to permanently settle 'shifting fields' and 'shifting people' (McElwee, 2004), as well as a forestlandallocation policy that ties people to specific plots of land, effectively making shifting cultivation impossible (Castella et al., 2005).

Marginal land areas will need to be used to meet the increasing requirement of future generations, especially in developing countries. These marginal areas commonly impose abiotic stresses on crops due to factors such as salinity, drought, flooding, low nutrients and aluminium or heavy metal toxicity. As a consequence, the growth and yield of crops from such areas is typically low and their quality in also poor. Endogenous plant growth regulators play an important role in regulating plant responses to abiotic stress by sensitizing growth and developmental processes. While the physiological and molecular mechanisms linked to the role of ABA and cytokinins in stress tolerance are well explained, there is growing interest to elucidate the associations of auxins, ethylene, gibberellins, brassinosteroids, and polyamines in stress tolerance mechanism and also on possible cross talk mechanism among different growth regulators during stress tolerance acquisition. Identification and characterization of the gene regulating synthesis of different endogenous growth regulators and recent progresses on hormonal signaling, mutant research, and physiological actions have provided scope for manipulating their biosynthetic pathways for developing transgenic crop plants with enhanced abiotic stress tolerance. Researches have also provided some leads in exploiting the potential of growth regulators in enhancing the resistance to abiotic stresses of crops. Plant growth-regulators (PGRs), are biochemical and chemical compounds stimulates plant growth and productivity when applied, even in small quantities at appropriate plant growth stages. These are being extensively used in agriculture to enhance the productivity in agricultural crops. Their central role in plant growth and development is through nutrient allocation and source-sink transitions while most of the plant bioregulators (PBRs) stimulate redox signaling under abiotic stress conditions.

Important features

• Cattle produce 81% of world milk production, followed by buffaloes with 15 percent, goats with 2 percent and sheep with 1 percent; camels provide 0.5 percent. The remaining share is produced by other dairy species such as equines and yaks.

• About one-third of milk production in developing countries comes from buffaloes, goats, camels and sheep. In developed countries, almost all milk is produced by cattle.

• Milk from dairy species other than cattle represents 40 percent of milk production in Asia, 23 percent in Africa, 3 percent in Europe and 0.5 percent in the Americas; it is almost non-existent in Oceania (FAO)

Taxonomy of Cattle

Cattle belong to the kingdom Animalia, phylum Chordata, class Mammalia, order Artiodactyla, family Bovidae, genus Bos, and species taurus or indicus. Cattle were originally identified by Carolus Linnaeus as three separate species: Bos taurus, Bos indicus, and Bos primigenius. Bovines, which include cattle, bison, African buffalo, water buffalos, and certain antelopes, belong to the subfamily Bovinae.

1.    Thomas Malthus suggested that population growth _____________.

(a) Would eventually lead to starvation and death as it exceeded the land’s potential to produce food

(b) Would lead to strong and better societies

(c) Would grow at a slower rate than land’s potential to produce food

(d) And the land’s potential to produce food would grow at the same rate

2.    Which population growth rate is likely to add relatively more to younger age population (youth effect on size of labour force)?

(a) Larger

(b) Smaller

(c) Uncertain

(d) Population growth rate does not affect the age structure of population

Introduction

Impact assessment is the process of identifying the future consequences of a current or proposed action. It is used to ensure that projects, programmes and policies are economically viable, socially equitable and environmentally sustainable. Programme Monitoring and Evaluation (PME) efforts are critical issues in management of agricultural research and development (R & D). In times of fiscal constraint, more emphasis is placed on accountability and programme effectiveness. As a management tool, PME is an integrated approach that incorporates the viewpoints of clientele, policy-makers, researchers and donors to address the intended goals. Public and private support to research will depend largely on efficiency issues and ability to reckon with multiple objectives, ranging from food security to sustainability, poverty alleviation, gender issues, export, etc. The PME of agricultural R & D projects is critical when the intended R&D has multiple outcomes. Monitoring and evaluation (M&E) of development activities provides government officials, development managers, and civil society with better means for learning from past experience, improving service delivery, planning and allocating resources, and demonstrating results as part of accountability to key stakeholders (World Bank, 2004).

GK Enterprise –Profile in brief

• Established in 2000 to provide Management Consultancy to all types of industries
• Centrally Located in Mumbai
• Consists of Group of Engineers having Industry Experience of more than 20 years
• Completed more than 500 plus ISO Certifications all over India & abroad.
• Certifications done for following areas –manufacturing, service, Education, Medical and projects business
• Established with a purpose of improving work efficiency of all types of business in India & abroad.

Reproductive Biotechnology
    
Artificial Insemination (AI)
    
History and Future Perspectives of Artificial Insemination
    
Semen Cryopreservation
    
Buffalo
    
Goat
    
Cryoprotection and Anti Oxidants
    
Cryopreservation and Genetic Stability of Livestock Spermatozoa
    
Insemination Technique
    
Cattle and Buffalo
    
Sheep and Goat
    
Conception Rate with Artificial Insemination
    
Multiple Ovulation and Embryo Transfer (MOET)
    
Advantages of Embryo Transfer
    
MOET Includes the Following Steps
    
Superovulatory Treatments
    
Insemination
    
Recovery of Embryos
    
Synchronization of Recipients
    
Cattle
    
Buffaloes
    
Goats
    
Horses
    
In vitro Maturation, fertilization and culture of Oocytes
    
Historical Development
    
In Vitro Maturation of Oocytes
    
In vitro Sperm Capacitation
    
Scope
    
Limitations
    
Embryo Cryopreservation
    
Ultrasonography in Reproductive Management
    
Ultrasound-guided Transvaginal Oocyte Pick-up (OPU)
    
Embryo Cloning or Nuclear Transfer
    
Blastomere Separation
    
Embryo Splitting
    
Nuclear Transfer Cloning (NT)
    
Embryonic Stem Cell Complementations
    
Limitations and Future Prospects of Cloning
    
Sexing of Embryos and Separation of X and Y Chromosomes Bearing Sperms
    
PCR  in Sex Determination
    
Transgenic Animal Production
    
Gene Transfer Through Direct DNA Microinjection
    
Gene Transfer with Retroviral-Vector Assistance
    
Gene Transfer through Production of Germ-line Chimeras
    
Parthenogenetic Embryos: An Emerging Tool in Reproductive Biotechnology for Multiplication of Superior Germ Plasm
    
Applications of Parthenogenesis
    
Livestock Genomics and Marker Assisted Selection (Use of DNA Level Markers)
    
Stem Cells
    
Vaccine for Fertility Control and Increase Prolificacy
    
Auto-immunization to Increase Prolificacy
    
Biotechnology of Conservation of Livestock Breed Biodiversity
    
Gene for Prolificity: Booroola Merino
    
Role of Biotechnology in Enhancing Production
    
Milk
    
Biotechnology of Rumen Manipulation
    
Genetically Modified Ruminal Microorganisms

Biotechnology of Animal Feeding
    
Probiotics
    
Biotechnology Crops as Animal Feed
    
Biotechnology of Animal Products
    
Some New Products made Possible by Biotechnology Include

About 25% of worldís total food production is lost due to insects, bacteria and rodents after harvesting.

Indiaís exports of Processed Food was Rs. 31563.43 Crores in 2014-15, which includes products like Mango pulp (Rs. 841.39 Crores), Dried and Preserved vegetable (Rs. 847.11 Crores), Other Processed Fruit and Vegetable (Rs. 2,569.93 Crores), Pulses (Rs. 1,209.51 Crores), Groundnuts (Rs. 4,675.35 Crores), Guargum (Rs. 9,480.00 Crores), Jaggery and Confectionary (Rs. 1,161.81 Crores), Cocoa Products (Rs. 848.62 Crores), Cereal preparations (Rs. 3,038.79 Crores), Alcoholic and Nonalcoholic beverages (Rs. 2,231.58 Crores) and Miscellaneous preparations (Rs. 2,437.77 Crores).

Commercial Crop Breeding

The term commercial crop breeding is straightaway equivalent to ‘commercial plant breeding’ and remains largely plant breeding with slight twist that commercial plant breeding aims at delivering commercial products to be delivered to the end users that is the farmers as per the need of the consumers/ markets. Thus, the farmers plant those products (open-pollinated cultivars and hybrids) which are easily accepted by the consumers and which are easy to be handled by the traders as the products reach to the traders and then from traders to the retailers and ultimately to the consumers.

While much has been written about the taxonomy of wild plants, the cultivated plants have always been looked at with suspicion by taxonomists. There might have feeling that cultivated plants are not natural and therefore fall outside the orbit of a taxonomist. It may be that taxonomy of cultivated plants is more difficult due to their extensive distribution needing wide sampling, rampant hybridization and high mutation rate, leading to diversity in their variation patterns. One of the principal advantages of the study of cultivated plants is that more often we know their genetic-evolutionary race history, together with its reasons and diversity. There is, therefore, a need to take up, what may be called as Hortorium Taxonomy, i.e. taxonomy of the cultivated plants so as to put the subject on a proper footing as a prelude to writing a ‘Flora of the Cultivated Plants of India’. The related wild species together with the elemental, basal or parental species of a cultivated species should be classified according to the rule of the International Code of Nomenclature for Cultivated plants based on the cultivar concept. A cultivar is not to be confused with a botanical variety.

OS COXAE

Ox: The os coxae or hip bone consists of 3 flat bones i.e ilium, ischium and pubis which fuse together to form the acetabulum.

Ilium: is largest of the 3 parts. It shows three surfaces, three borders and three angels. The lateral (gluteal) surface presents gluteal line parallel to cotyloid border. The medial surface consists of rough medial triangular part, the sacral surface for articulation with sacrum and a smooth quadrilateral part, iliac surface. The iliopectineal line separates these surfaces and bears psoas tubercle in its middle (Fig. 6.1).

The Food and Agriculture Organization (FAO) estimates that up to 40% of food crops are lost due to plant pests and diseases annually. Such losses not only threaten global food security but also have the potential to limit food access due to unavailability of food, or sharp increases in food prices. But this challenge is also an opportunity to find new ways to help crops better withstand adverse conditions in a farmer’s field.