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Flowers, the aesthetic creations of God over the earth and symbolize beauty, purity, peace and love. Flowers have been associated with progress and prosperity from ancient times. They have long been associated with each civilization and culture in the world, and are integral part of traditional, religious ceremonies and rituals and no function, from birth till death, are complete without the use of flowers. They play a cardinal role in human behaviour and culture, bringing tranquility and peace of mind. Sensory elements of flowers like fragrance, colour, texture, softness, freshness, etc. influence human psyche in different manner.

From a symbol of love, flowers have transformed into an industry generating both income as well as employment. In the flower industry, significant changes are occurring in the competitive relationships worldwide due to increasing habit of “saying it with flowers” to celebrate major life events, expressing emotions in ways that words are deficient. Estimate of the annual consumption of commercially grown flower vary by source and range from 40-60 billion USD. Global exports over the last few years have grown by more than 10 per cent annually. Flower growing and its value addition viz., essential oils, natural dye extraction, dry flowers, floral ornaments, bouquets and artistic garlands, etc. is associated with variety of employment generation activities. Besides the traditional centres of production, new production centres are also developing.

In the beginning, human kind selected some of the useful wild flowers and brought them to gardens for decoration; mainly used for their floral and other values. The rose, which is an high value flower today, has long history, perhaps older than man. Carnation was grown in Greece during 300 B. C. Orchids were known for their attractive flowers and scent in China about 2500 years ago as mentioned by Confucius. Chrysanthemum is the another oldest flower grown in China as early as 500 B. C. At the time of Confucius, only a wild single-flowered type was known in chrysanthemum. Later on many new varieties arose and in Japan, the flower reached a high stage of development and popularity. From Japan, the chrysanthemum spread to Europe. Now some of the best known modern varieties have been developed in Europe, America, and Australia. Lotus, an aquatic ornamental flower, is native to India and is associated with religion, art and culture of Indian civilization. Eloquent references to the aesthetics of these ornaments are available from ancient literature and sculptures. Most of the garden flowers were introduced into Europe for cultivation from their wild habitats between 16^th and 19^th centuries.

1.1 Importance of Food Process Engineering

Food occupies the first position among the hierarchal needs of human beings. It is more important than shelter and clothing. After production and be forec on sumpti on, food commodities are subjected to nume rous unfavourable physical, chemical, microbial or parasitic factors which may cause their spoilage or disease when consumed. To prevent such spoilage, a process engineer has to understand these and provide remedial measures. The two primary goals of processing operation are first to minimize post harvest losses and second value addition of raw food commodities through preservation and processing.

Present level of production of different types of food commodities and their estimated post-harvest losses along with monetary values are given in Table 1.1. It shows that various food items get lost, to the tune of 65 million tonnes, worth Rs. 76,000 crores per annum, during post-harvest phase. A substantial amount of these losses could be prevented if appropriate agro processing centers, having backward linkage with farmers to ensure constant supply of quality raw food materials, are established and operated. Profit generated through value addition must also be shared with farmers, who are only people in the world to create wealth every year, in the form of food, fiber and other commodities necessary for human survival. It can bring sea change in rural areas, where 65-70% population live, in respect of economy, health and happiness.

It sounds simple, but the above process is fairly complex and requires lot of coordination in order to succeed. The major challenge is to minimize the losses during the various post harvest operations and keep the food as fresh as possible. In order to do so, one must first try to understand the various causes of post harvest losses of food commodities and the various factors that influence theses causes. Secondly, we must use those food processing operations that will not only extend the shelf life of the produce but also convert the raw food commodities to more acceptable product to the consumer.

Pesticides offer one of the best means of controlling plant diseases and pests and subsequently improving the yield. They have been used since the 19^th century. Pesticides, undoutly are poisonous and their indiscriminate use and abuse may result in ecological imbalance resulting in pest resurgence, aggravation of minor pest, pesticides resistance, environmental pollution, poising serious health hazards to man and animals. However, if used judiciously, following the guide line of Pesticide Action Network (PAN), such problems are not likely to occur, and instead improve crop yield. It is however unfortunate that many of us really lack the insight in Materia Medica of plant diseases and pests and most of the problems have occurred due to misuse and abuse of pesticides for which man is responsible and not the pesticides.

With increase in population, demand for basic needs has been steeply rising during the past decades in most of the developing countries of the world. The growing population needs food, clothing, shelter, fuel and fodder for them and their livestock. In India, 50 to 70% of the people are living in rural areas that neither have adequate land holdings nor alternate service opportunities to produce or procure these basic commodities.

The present day living demands quality life. The quality life can be maintained provided our surroundings remain intact or improved to provide means for better living. With increasing advancements in science and technology, we have manipulated our environment without paying adequate attention to consequences. The result has become so alarming that now all the countries of the world are trying to actualize the meaning and concept of sustainability. It is more so in case of agriculture as it forms core base of life supporting system.

The magnitude of manipulation varies from country to country depending upon level of development. It goes without saying that development and manipulation of environment are interrelated having positive and negative effects. To eradicate ill effects of manipulation, we need to understand the meaning of actualizing of sustainability.

Throughout history, humanity has been locked in a perpetual struggle with the forces of nature, and one of the most insidious and destructive of these forces is drought. A creeping disaster that seeps into the very fabric of communities, drought leaves behind a trail of devastation and despair, testing the resilience of societies and pushing the boundaries of human endurance. From the ancient civilizations of Mesopotamia to modern-day cities, droughts have ravaged the landscape, claiming lives, destroying livelihoods, and reshaping the course of human history. • The impact of drought is far-reaching and multifaceted, affecting not just the environment, but also the economy, health, and overall wellbeing of individuals and communities. Crops wither and die, livestock perish, and entire ecosystems are disrupted, leading to food and water shortages that can have catastrophic consequences. The economic toll of drought can be equally devastating, as agriculture, industry, and tourism is severely impacted, leading to widespread unemployment and poverty. • What makes droughts particularly pernicious is their ability to unfold slowly, their effects accumulating over time,

The cashew nut (Anacardium occidentale L.) belongs to Anacardiaceae family which also includes the mango, pistachio and poison ivy (Nakasone and Paull, 1998). Anacardium contains 8 species all of which are native to the coastal parts of north eastern Brazil (Azam-Ali and Judge, 2001). Cashew nut tree provides food, employment, income and the wood is used for carpentry mainly in the construction of boats and ferries while other products derived from it include firewood and charcoal (Akinwale, 2000). Cashew resins are also used in the manufacture of insect repellents and natural insecticides, while different tree parts have medicinal value as they are used to cure various diseases (Cavalcante et al., 2003). The cashew tree is a sprawling broad-leafed evergreen, well adapted to poor soils and dry sandy locations, drought resistant, but grows best on well drained sandy soils with pH of 4.5 to 6.5 (Aliyu, 2004). It favours temperatures between 15 to 35°C and rainfall over 400 mm with elevation of up to 1000 m above sea level.

Preserving the productivity of agricultural land over a long term requires sustainable food production. Sustainability is achieved through alternative agricultural practices informed by in-depth knowledge of the ecological processes occurring in farm fields and the larger landscape of which they are a part. From this foundation, we can move towards the social and economic changes that promote sustainability of all sectors of the food system. Sustainability means different things to different people, but there is a general agreement that it has an ecological basis.

In recent years, all eyes seem to be focused on visions of the future. High-tech, bio-tech, and info-tech are the key words most frequently used among those who are concerned with future agriculture development. Many also forecast increasing vertical integration of production, processing distribution functions-including activities from molecular level to consumer preference i.e. from seed to table, thus increasing dependence on biotechnology and information technology at all levels in world agriculture.

Conventional farming systems vary from farm to farm and from country to country. However, they share many common characteristics viz.,rapid technological innovation; large capital investments in order to apply production and management technology; large-scale farms; single crops/ row crops grown continuously over many seasons; uniform high-yielding hybrid crops; extensive use of pesticides, fertilizers, and external energy inputs; high labour efficiency; and dependency on agribusiness. In the case of livestock, most production comes from confined, concentrated systems.

Agricultural development in independent India can be divided into 3 distinct phases. The phase I started during 1950, wherein local cultivars, indigenous technology, green manuring being the inputs and the expected output was quite low. Alarming rise in the population rate forced the scientists to think of alternatives to the local cultivars with higher response to fertilizers & jump in yield levels. This marked the beginning of phase-II (1965), wherein high yielding varieties, fertilizers, mechanistion & irrigation were used as the inputs and production increase was lucrative. And this phase was popularly called as ‘Green Revolution’ phase in the History of Indian Agriculture. But after 20-25 years the impact of high input technology was reflected in the degradation of agro-ecosystem & once again forced the scientists to think of a viable option to keep intact the resource base & to harvest more/sustain yield levels to feed the burgeoning population. This being the third phase is popularly called as phase of sustainable agriculture organic farming phase started from 1980’s onwards. This gave an impetus to environmentalists, to think seriously regarding protection of the ecosystem.

In today’s times, a lot of innovation has come into agriculture. This very hard occupation requires an amalgation of farmers with the scientists. From the rural areas after education the technocrats are moving to the cities and this is creating a great loss to the agriculturists. As the population is growing so is the demand for food. Due to shortage in the storage systems the amount of wastage has increased a lot. It is an important aspect to be looked into. A lot of waste material is seen in the vegetable markets, city markets and near the slums. This causes a lot of pollution and spoils the environment. It is important to know why is it increasing and why the facilities for wastes do not exist.

Uncertainty is an inevitable character of any system where most of the contradictory factors are either unpredictable or unfathomable. The higher is the complexity, the lesser would be the resilience. Agricultural production system, as it is managed in Indian condition, is the most vulnerable one to a plethora of uncertainties. Mostly managed in an open air rained conditions, it has been exposed to weather and resource uncertainties comprising of market volatility, poor access to technology and a fragile input delivery mechanism. The present study examines and depicts the possible issues and reasons for uncertainty.

Indian poultry industry has made a fastest and remarkable growth ever since its inception and is presently emerging as a sunrise sector with a growth rate of 6-8 percent per annum. Today India is third largest producer of chicken egg and fifth largest producer of broilers/chicken meat in the world (Food and Agriculture Organization Corporate Statistical Database (FAOSTAT), 2018), with estimated production of 103.3 billion numbers eggs and 4.06 million tonnes of poultry meat in year 2018-19. Poultry sector contributes Rs.1347.57 billion in total output of livestock sector which hold 12.91 percent share (Basic Animal Husbandry Statistics (BAHS, 2019). The Indian poultry market was worth Rs.1,750 billion in 2018 and was worth Rs. 2,049 billion in 2019. The market is further projected to reach Rs. 4,340 billion by 2024, growing at a Compound Annual Growth Rate (CAGR) of 16.2 percent during 2019-2024 (www.indianmirror.com). The major growth drivers for the sector are increasing incomes coupled by changing food habits, large un-penetrated market, growth in the processing sector, and awareness of the consumer about the safe and hygienic poultry products. The sector has provided direct employment to 40 lakh and indirect employment to 2.5 crore people (Khan, 2019). The annual per capita availability of poultry products has increased from 5 eggs and 400 gram chicken in 1950 to 79 eggs and 3.21 kg chicken in 2019. However, it is far below then recommended consumption of 180 eggs and 10.8 kg poultry meat per person per annum by Indian Council of Medical Research.

1.1. Definition

A tractor is a specific vehicle designed to deliver a high tractive torque at slow speeds, for the purposes of haulage or for pulling an agricultural implement or equipment or machinery. This vehicle is also used as a source of power for stand-alone agricultural machineries. The word tractor is taken from Latin being the agent noun of trahere “to pull”.

1.2. History of evolution

The first engine-powered farm tractors used steam and were introduced in 1868. These engines resembled small road locomotives. They were used for general road haulage and in particular for timber trade. The most popular steam tractor was the Garrett 4CD.

In 1887, gasoline-fuelled engines were tried as an alternative to steam engines. Later, Henry Ford produced his first experimental gasoline powered tractor in 1907, under the direction of his chief engineer Joseph Galamb. It was referred to as an “automobile plow”. While unpopular at first, these gasoline powered machines began to catch on. In the 1910, the size of the tractor was smaller than the earlier introductions and also became more affordable. In 1917, Henry Ford introduced the first mass-produced tractor. These were built in the U.S.A., Ireland, England and Russia. The unique feature of these tractor consisted of the strength of the engine holding the entire machine together. By 1920, tractors with a gasoline powered internal combustions engine had become a norm.

1.3. History in India

The level of mechanization in Agriculture was very low at the time of independence in 1947. But, the initial few five-year plans implemented by the Government of India gave an impetus to the improvement in the production and productivity of major crops including mechanization via joint ventures and tie-ups between local industrialists and international tractor manufacturers. It was three decades after independence that the domestic production of 4-wheel tractors grew slowly. In 1990, the tractor production was nearly 2,70,000 units per year and by the 2013, the volume approached to about 6,96,000 units per year. India has presently overtaken the United States as the world’s largest producer of four-wheel tractors with over 16 national and 4 multinational corporations engaged in its production. But still the Food and Agriculture Organization estimates that from out of the total agricultural area, less than 50% is under-mechanized land preparation. This indicates that potential for large tractorization still exists. Credit facilities for farmers have been improving steadily over the years. This is one of the prime drivers of the sale of tractor in India.

Entomopathogenic nematode (EPN) viz., Heterorhabditis, Neosteinernema and Steinernema have been recovered from many regions of the world. They selectively infect many insects and a few other arthropods but do not adversely affect mammals or plants. They are actually vectors of pathogenic bacteria, cause relatively rapid death of the host (24 – 48 h) and show considerable potential in biological control of insect pests in the integrated pest management systems.

EPNs are similar to insect parasitoids in that the immature form develops at the expense of one host individual; they are ecologically similar to both parasitoids and arthropod predators because the host individually killed. However, these nematodes differ from predators and parasitoids in two ways: (1) the nematode is mutualistically associated with a bacterial pathogen which actually kills the host, and (2) the pathogenicity of the bacterium has a great influence on the efficacy of the system (Ehler, 1990). The purpose of this chapter is to introduce EPN as biocontrol agents in this refresher course and to provide an overview of some current issues in biological control of insects with particular emphasis on their relevance to the use of EPNs.

Biological control is defined as the action of natural enemies which maintains a host population at levels lower than would occur in the absence of the enemies. Natural enemies will include parasitoids, predators, nematodes, microbial pathogens and their gene products. Entomologists generally divide biological control into two categories: (1) natural biological control which is effected by native or coevolved natural enemies in the native home (origin) of a given insect and (2) applied biological control which due to human intervention. Applied biological control is further divided into classical biological control (introduction of exotic natural enemies) and augmentative biological control (enhancement of natural enemies already in place).

In insects nervous system is highly developed and serves to coordinate the activities of its various systems. Units of this system are known as neurons. Which carry information in the form of electrical impulses from external and internal sensilla (Sensory cells) to appropriate effectors e.g., glands, muscles and glail cells. Nervous system of insects may be divided into three parts.

1. Central nervous system
2. Sympathetic or visceral nervous system
3. Peripheral nervous system.

Definition

Paracelsus saying– Nothing is devoid of poison it is the dose that differentiate between a drug and a poison.

? Poison- Any chemical substance either naturally present or Man made produces deleterious effect on the health of living organism are termed as Poisons.

? Toxicology term derived from Greek Word Toxicon which means Poison.

Definitions

? Toxicology: It is the science or study of poisons on biologic systems, including their properties, actions and effects. Also their detection and identification, the treatment and prevention of the conditions produced by them.

? Toxicant: Any poisonous agent/ Professional Term used for Poison.

? Xenobiotic: Derived from Greek Word Xenos means – alien or foreign.

? Xenobiotics are those substances which are foreign to the body and are biologically active but do not take part in the process of energy production.

India’s agrarian culture and economy is undergoing drastic changes. In this progressive path of agricultural resurrection, a comprehensive multidimensional understanding of agricultural development is of great importance. In the present context of Kerala, where the local administrative bodies are vested with more powers to plan and execute need based agricultural development activities, a clear understanding of the concept of agricultural development among the major stakeholders shall serve as a firm base for development.

An invasive species is an organism that causes ecological or economic harm in a new environment where it is not native. Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats. This can result in huge economic impacts and fundamental disruptions of coastal and Great Lakes ecosystems. Invasive species threaten and can alter our natural environment and habitats and disrupt essential ecosystem functions. Invasive plants specifically displace native vegetation through competition for water, nutrients, and space. Once established, invasive species can reduce soil productivity. The negative effects of invasive alien species on biodiversity can be intensified by climate change, habitat destruction and pollution. Isolated ecosystems such as islands are particularly affected. Loss of biodiversity will have major consequences on human well-being.

6.1. Speed Detection of Pests in China for Phytosanitary Programme

Phytosanitary procedures such as pest detection and identification rely on technology. With the rapid development of science, it is necessary for national plant protection organizations to keep informed and to make diagnoses more sensitive and accurate. Previous general pest detection methods frequently have limitations for the diagnosis of quarantine pests. In the past ten years, China has conducted considerable research into how to improve its diagnostic measures and methods.

6.1.1. General Pest Detection Measures and Methods

Traditional determination of morphology by microscope is used mostly to detect fungi and adult insects. The morphological method may be used, for example, in the separate identification of wheat dwarf bunt (Tilletia controversa), wheat karnal bunt (T. indica) and wheat common bunt (T. tritici). On the other hand, it is hard to detect seed-borne pests using the morphological method.

Isolation culture is also used to detect fungi and bacteria in China. It is an effective method for detecting seed-borne disease or systemic infection. However, it takes a long time (more than 1-2 weeks). Inoculating the indicated plant (a healthy plant that is a host for the suspected pest organism) is used mainly to identify viruses. This was the principal and time-consuming detection method used before immunological and molecular biological methods were developed. Because viruses are very important kinds of quarantine pests of young plants, effective and rapid methods for detection were urgently needed.

Concept of Inventory

‘Inventory’ may be defined as ‘usable but idle resource’. If resource is some physical and tangible object such as materials, then it is generally termed as stock. Thus stock or inventory are synonymous terms though inventory has wider implications. Broadly speaking, the problem of inventory management is one of maintaining, for a given financial investment, an adequate supply of something to meet an expected demand pattern. This could be raw materials work in progress finished products or the spares and other indirect materials. Inventory can be one of the indicators of the management effectiveness on the materials management front. Inventory turnover ratio (annual demand/average inventory) is an index of business performance. A soundly managed organization will have higher inventory turnover ratio and vice-versa. Inventory management deals with the determination of optimal policies and procedures for procurement of commodities. Since it is quite difficult to imagine a real work situation in which the required material will be made available at the point of use instantaneously, hence maintaining, inventories becomes almost necessary. Thus inventories could be visualized as ‘necessary evil’.