eChapters

The respiratory system or tracheal system is involved in gaseous exchange in the insect with the environment. In this system there is a system of internal tubes, the tracheae that directly transport the oxygen to the parts of the body. Therefore, it does not use the circulatory system as the vehicle for gaseous exchange. The trachae open outside through segmental pores called spiracles having some system of closing and opening. Except proturans and some collembolans all insects possess tracheal system for respiration. These insects live in moist habitats where gaseous exchange takes place directly with the environment via the integument.

Climate change produces long-term alterations in temperature, precipitation, wind and atmospheric carbon dioxide. Because insects are ectothermic organisms, these environmental changes strongly influence their physiology, ecology and behaviour. Rising temperatures can modify development, movement, feeding, mating, reproduction, diapause, migration and survival. Altered rainfall and extreme weather may affect habitat suitability, host availability and interactions with natural enemies. Climate-related behavioural changes can influence pest abundance, crop damage, geographical distribution and the timing of infestations. This chapter examines how insects respond behaviourally to changing environmental conditions and explains why understanding these responses is essential for forecasting pest outbreaks and developing effective climate-resilient crop-protection strategies.

Introduction

Reviving the agricultural economy is a crucial endeavor with far-reaching implications for food security, economic prosperity, and sustainable development. Several key strategies can be adopted to achieve this goal. First, policymakers must prioritize agriculture by providing necessary f inancial support, infrastructure development, and research and development investments. Adequate credit facilities and subsidies can help farmers access essential resources and modern technology, boosting productivity and efficiency (Asian Development Bank, 2018). Promoting sustainable agricultural practices is vital to ensure long-term viability. Encouraging the adoption of eco-friendly methods such as organic farming, crop rotation, and water-efficient irrigation can enhance environmental resilience while safeguarding natural resources for future generations. Empowering farmers through training and education is essential. Equipping them with the latest knowledge and techniques enhances their capacity to adapt to changing conditions and make informed decisions about crop selection, pest control, and market opportunities. Furthermore, enhancing market linkages is critical to connect farmers with consumers and ensure fair prices for agricultural produce (African Development Bank, 2022). Developing efficient supply chains and reducing post-harvest losses can improve income prospects for farmers and attract more youth to the sector. Lastly, encouraging private sector involvement and investment in agriculture can accelerate growth and innovation. Public-private partnerships can create opportunities for technological advancements, value addition, and market expansion (Liu & Lee, 2018). Reviving the agricultural economy requires a collaborative effort involving governments, farmers, the private sector, and civil society. By addressing challenges, investing in modernization, and promoting sustainable practices, nations can create a thriving agricultural sector that contributes to food security, economic development, and environmental sustainability (Brown, 2021).

Agricultural robotics addresses labour shortages, production demands, environmental concerns and the need for greater operational precision. This chapter examines unmanned aerial vehicles, autonomous ground machines, robotic manipulators, greenhouse robots and livestock systems. Enabling technologies include multimodal sensors, computer vision, navigation, control systems and artificial intelligence. Applications extend from land preparation, sowing and crop monitoring to weeding, spraying, irrigation, harvesting and post-harvest processing. Emerging approaches such as reinforcement learning, digital twins, swarm coordination and soft robotics are also explored. Technical reliability, high investment, connectivity, labour displacement and data ownership remain important barriers. Future development must prioritize accessible, affordable and farmer-oriented automation platforms.

Economic Importance of Rodent Pests

• They consume and damage foods in the fields and in stores. In addition, they spoil it in store by urine and droppings reducing the sale values.
• Due to their gnawing and burrowing habit they destroy many articles (packing, clothes and furniture) and structures (floors, buildings, bridges, etc). By gnawing the electrical cables they can cause fires.
• They are responsible for transmitting diseases dangerous to human and domestic animals.

Among many pests of agricultural crops and stored grain products, rodents are the major pests which do the great damage. Rodents including rats, mice and squirrels are gnawing animals having chisel like teeth. They have highly developed sense of smell, taste and hearing. They are omnivorous and feed on grains, vegetables, fruits, meat and other products in the houses or in the fields. Rats daily consume food equal to about 10 per cent of their body weight and the figure may go up to 30 per cent in case of mice. Rats are among the most destructive pests of paddy in the field causing about 5-10 percent damage. It is estimated that these animals destroy 30 per cent of the total world’s cereal production. In India, 10 million tonnes of food grains are lost every year. It is often said that if rodent ravages could be controlled, a huge amount of food grains can be saved.

Of the 84 species of order Rodentia in India, 50 belong to family Muridae. The important ones belong to two sub-families, viz., Murinae and Gerbillinae. Murinae has 18 species of genus Rattus, 2 of Bandicota, 7 of Mus, 2 of Apodemus and a few each under eight other genera. The sub-family Gerbillinae has 2 species of Gerbillus, one each of Tatera and Meriones. Family Sciuridae has 10 species of flying squirrels and 13 species of tree squirrels in India.

Bio-stimulants are increasingly used to improve crop performance while reducing dependence on intensive chemical inputs. They include amino acids, protein hydrolysates, humic substances, seaweed extracts, beneficial microorganisms and plant- or microbial-derived compounds. These substances can influence root architecture, nutrient assimilation, hormonal balance, photosynthesis, stress tolerance and disease resistance. This chapter examines the effects of different bio-stimulants on onion seed germination, vegetative growth, bulb development, yield, quality and storage life. It discusses their modes of action, application methods and integration with nutrient-management programmes. Bio-stimulants are presented as promising components of environmentally responsible and resource-efficient onion production, while areas requiring further research are identified.

Data science supports precision agriculture by converting large and varied agricultural datasets into actionable knowledge. Information from soil sensors, weather stations, satellites, drones and smart machinery can guide field preparation, sowing, irrigation, fertilization, pest control and harvesting. This chapter examines data collection, storage, analytics, machine learning, predictive modelling and real-time IoT monitoring. It explains how these tools can optimize water, nutrients, energy and other agricultural inputs while improving productivity and sustainability. Implementation challenges include high costs, insufficient technical knowledge, privacy concerns and inadequate digital infrastructure. Emerging cloud, edge, blockchain and artificial-intelligence technologies are discussed as mechanisms for advancing climate-smart and data-driven agricultural management.

Introduction

India is the largest developing economy of the world and about 70 per cent of its population is dependent directly or indirectly on this profession.  To meet the food requirement of the ever-multiplying population of this country, agriculture production has to be maximized by using genetically improved varieties, fertilizers improved implements, seed, and other agronomical technologies. Beside these improvements the agriculture production has remained static for the last decade. For further improvements in agricultural production we have to adopt comprehensive strategies. One of such strategies is the pollination management that is a very vital process of agriculture crop production. Pollination is a process involving reproductive parts of a flower and an external agent in the form of a vector. According to Prof. E.C. Martin, the value of bee pollination of fruits, vegetables and seeds in the United States of America totaled very close to $8 billion in the 1960s; the figure 20 years later is probably close to $20 billion.

INTRODUCTION

The first significant economic contribution of host plant resistance in agriculture was made in 1890 when European grape vines were successfully grafted on resistant root stock to save the French Wine industry from viteus vilifaliac (Fitch). Studies from the past century have led to the development of resistant varieties in about 15 crops to about 50 key insect pests. During the last 20 years alone, more than 500 insect resistant cultivars of rice, maize, cotton, sorghum, alfalfa and wheat have been developed and released world wide (Dhaliwal and Arora, 2001). The insect resistant varieties are grown on millions of ha. annually and help the farmers to save billions of dollars in insecticide costs (Dhaliwal and Arora, 2001). The role of Host Plant Resistance in Integrated Pest Management is discussed below.

Introduction

The world of living organisms essentially consists of the kingdoms of plants and animals. Myriads of organisms representing these two, interact among them, ranging from symbiosis and mutualism to competition and predator-prey interactions. The last mentioned process is one the important components of ecological dynamics, that determine the balance of nature or equilibrium among the biota. To this category belong the predators, parasites (parasitoids), pathogens, and so on, all of which live at the cost of another organism, without affording any benefit to the ‘victim’, hence the victim is termed the ‘prey’. In an agroecosystem, when an organism, explodes into an unusually high number, devouring cultivated plants it often becomes a ‘pest’ from a man’s point of view. Sometimes the pest can be a human nuisance too. It is here, that the role of predators and parasitoids become relevant as biological agents against the pests.
 
A lion, which preys on herb-feeding antelopes, is also a predator. But, its roles become restricted to maintaining the balance of the antelope population. Left undeterred, antelopes can explode to levels that can threaten grasslands. Here lions play a very crucial role in maintaining (through hunting antelopes) the equilibrium of the grasslands, just sufficient for these plants to surge with every rain. Otherwise, the grasslands potentially may get denuded by the antelopes, or conversely it may override other ecosystems. This is part of the ‘food web’ and is found in every ecosystems; desert, aquatic, mountains, forests, agro-ecosystems, etc.

Introduction

Indiscriminate use of acaricides not only causes the development of resistance in phytophagous mites but are also harmful to their natural enemies, therefore, poses a serious problem of pest resurgence. Hence, worldwide attention has been focused to utilize the natural biocontrol agents and minimize the use of chemical pesticides for the control of mite pests in agriculture with a view to develop a suitable IPM strategy. Among natural enemies of phytophagous mites, predatory mites have been found to be most effective and efficient tool in IPM programme because of the fact that many of these are not only abundantly available in nature but are also voracious feeders and have proven ability to suppress the pest mite population below economic injury level. Beside this, predatory mite can locate, run and catch hold of the pest mites even the pest mite is hiding in rolled leaves, under webs or even in the galls or erinium, etc. Some of the predatory mites require very low population of pest mites as prey, for their survival and multiplication, which is an added advantage for potential predation. Some predatory mites such as Typhlodromus pyri have good synchronization with the prey mite, Panonychus ulmi as, both hibernate and remain active in orchards.

Introduction 
Chapter 14 explores the intricate relationship between rural development and agricultural economics, emphasizing their roles in promoting sustainability and food security. This chapter examines various aspects of agricultural policy, agribusiness, farm management, rural entrepreneurship, and sociology, linking these elements to broader economic and environmental concerns. The chapter starts with an analysis of agricultural policy and development, discussing how policy frameworks shape agricultural practices and rural growth. It highlights the importance of effective policies in fostering agricultural innovation, improving productivity, and supporting rural development. Agribusiness and marketing are crucial components of agricultural economics. This section delves into agribusiness strategies and agricultural marketing practices that influence market access, value addition, and overall economic viability for farmers and agribusinesses. Farm management and financial analysis are essential for optimizing agricultural operations and ensuring financial sustainability. The chapter explores principles of farm management, including planning, decision-making, and risk management, along with techniques for financial analysis to evaluate the profitability and efficiency of farming enterprises. Rural entrepreneurship is highlighted as a key driver of economic development in rural areas. This section examines how entrepreneurial activities contribute to rural growth, job creation, and economic diversification, fostering resilience and innovation in rural communities. Rural sociology provides insights into the social dimensions of rural development. The chapter covers the importance of rural sociology in understanding social structures, behaviors, and dynamics within rural communities. It also discusses new concepts in rural sociology that address contemporary challenges and opportunities. The importance of rural development and agricultural economics in food security is emphasized. The chapter explains how these fields contribute to enhancing food security by improving agricultural practices, supporting rural livelihoods, and addressing food supply challenges.

First aid is the initial treatment of a person suffering from a pesticide exposure, before seeking proper medical attention. The first action is to remove the person from the source of the exposure by removing pesticide from the skin, removing contaminated clothing, or getting the person to fresh air. While doing this, be careful to avoid contaminating yourself.

All due precautions have to be exercised in handling pesticides because many of these leave toxic residues on treated food materials and plants which accumulate in higher concentrations in animals which consume these.

General Precautions

Read the precautions given by the manufacturer of the pesticides carefully. Store the pesticides under lock and key; prevent access of children to these; empty containers must be disposed off safely.

Blood and skin contaminations must be avoided.

The godown for fumigation must be made airtight by closing the doors, windows, ventilators, crevices etc.

In case of fumigation, the operator must use a suitable gas mask. It is a face-piece connected to a canister containing an absorbent material for the vapours of the fumigants by means of a flexible non-kinking breathing tube and provided with valves so that all air inhaled by the user passes through the canister and the exhausted air passes directly to the outside atmosphere through a non-return valve. The absorbent canister carries instructions indicating the number of hours for which it is effective in an atmosphere charged with the fumigant.

After the required exposure period, aerate the godown thoroughly. First open the entrance door, keep it open for 6-7 hours, then only enter and open other doors or windows.

After having performed their function, pesticides in the parent form or in some converted form reach the soil, the ultimate sink for these moieties which are collectively termed as residues. According to FAO 1986, pesticide residue is defined as any substance or mixture of substances in food, agricultural commodities or animal feed resulting from the use of pesticides and includes any specified derivatives such as degradation products, metabolism, reaction products and impurities that are considered to be of toxicological significance. From the soil they move into other segments of the environment. The pesticide residues are absorbed by plants and enter the food chain, where they get concentrated in animal fat. Some residues are carried away by wind in the vapor form, which enables them to be transported to long distances from the source of application and then get collected by dust and rain before they are deposited on the ground again. Pesticide residues also move to aquatic environments through runoff, leaching, and atmosphere disposition.

INTRODUCTION

Management of several of the important insect-pests of crops is becoming increasingly difficult owing to a number of factors by which pests have been able to offset the effect of control interventions. Several of the present day pest management problems may be ascribed to the excessive and indiscriminate use of chemical pesticides during the last about three decades. Routine application of insecticides for controlling insect-pests, without taking into consideration whether economic damage to the crops is being inflicted by the pest or not, has resulted into several problems like pest resistance, pest resurgence, pest replacement, killing of natural enemies of pests, presence of toxic residues in food, and soil and environmental pollution, etc., apart from increase in the cost of plant protection. Entomologists have been trying to find solution to these problems through integrated pest management of which monitoring of insect activity through regular surveys is an important component. In fact, knowledge of insect activity is indispensable since pest management system can not operate without accurate estimates of pests and natural enemies population or without reliable assessment of plant damage and its effect on yield.

Sapota, Manilkara zapota commonly called Chickoo is a popular tropical winter fruit cultivated widely in Gujarat, West Bengal, Telangana, Andhra Pradesh, Maharashtra and Tamil Nadu. In north, its cultivation is seen across Jammu to Dehradun. Very few insect pests infest Sapota, the details of which are given hereunder:

Sapota leaf webber, Nephopteryx eugraphella Ragonot (Pyralidae: Lepidoptera)

This is a pest of major concern in Chickoo cultivation in India. The eggs are oval and pale yellow in colour which change to reddish brown near hatching. The caterpillar is pinkish in appearance and bears two longitudinal dorsolateral lines. The full fed larva measures 25 mm in length. The newly formed light green pupa changes to reddish brown in the later stage. The adult is a greyish moth having hooked antennae (Plate 10e) bears two vertical lines on the forewing whereas, the hind wings