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Soil supports diverse arthropod communities, including insects, mites, springtails, spiders, millipedes and centipedes. These organisms contribute to decomposition, nutrient cycling, soil formation, microbial regulation and food-web stability. Their activities improve soil fertility, structure and overall ecosystem functioning. However, soil arthropods are highly responsive to temperature, moisture, vegetation and other environmental factors. Global warming, altered rainfall, drought and changes in soil properties can modify their diversity, abundance, distribution and ecological interactions. Despite their importance, climate-change effects on soil arthropods remain comparatively understudied. This chapter examines their ecological roles, relationships with soil properties and responses to changing climatic conditions in agricultural ecosystems.

Introduction

The problem of dealing with climate change, a critical global issue, has come to define our era. Human activities are rapidly altering Earth’s climate, with far- reaching repercussions for many industries, including agriculture. The necessity for environmentally responsible food production is pressing as the global population rises. One possible way to lessen the effects of global warming on food production is to adopt the sustainable agriculture practice of striking a balance between environmental protection, social justice, and economic viability. The impacts of climate change on farming may be seen all across the world right now. Global food security is threatened by climate change, which is causing higher temperatures, changing precipitation patterns, and increasing extreme weather events. Greenhouse gas emissions, deforestation, and unsustainable farming practices all have a hand in accelerating global warming. Therefore, it is crucial to tackle the double problem of lowering agriculture’s environmental imprint while also adapting it to climate change. Sustainable agriculture works toward a compromise by encouraging robust and flexible agricultural practices. It aims to ensure the sustainability of food production in the future while reducing environmental effects by incorporating climate change adaptation and mitigation techniques into agricultural practices. Agricultural systems can be made more resistant to climate change by the use of sustainable farming practices such as agroforestry, crop diversification, soil conservation, and water management. Sustainable farming practices help communities adapt to climate change, boost local economies, and secure food supplies for future generations.

Introduction 
Chapter 15 provides a comprehensive analysis of climate change and its profound effects on agriculture and global food systems. This chapter delves into the science of climate change, focusing on its impacts on agricultural practices, climate-smart strategies, and the role of specialized climate change centers and institutes. The chapter begins with an exploration of the impacts of climate change on agriculture, detailing how shifts in temperature, precipitation patterns, and extreme weather events affect crop yields, livestock production, and overall agricultural productivity. It highlights the vulnerabilities of different agricultural systems and regions to climate change. Climate-smart agricultural practices are central to adapting to and mitigating the effects of climate change. This section covers adaptation strategies, such as adjusting planting dates, diversifying crops, and improving water management. It also addresses mitigation strategies, including reducing greenhouse gas emissions through sustainable farming practices and enhancing carbon sequestration in soils. Adaptation and mitigation strategies are discussed in detail, with an emphasis on how these approaches can be integrated to address climate change comprehensively. The interplay between adaptation (adjusting to changing conditions) and mitigation (reducing the root causes of climate change) is examined, emphasizing the need for balanced and coordinated efforts. The chapter underscores the importance of climate change centers and institutes in addressing food security. These institutions play a crucial role in research, policy development, and the implementation of climate-smart practices. They provide valuable data, tools, and guidance for managing the impacts of climate change on agriculture. The impact of climate change centers and institutes on global warming is analyzed, focusing on how these organizations contribute to reducing greenhouse gas emissions and enhancing adaptive capacity. Their role in advancing climate science and supporting climate action is highlighted. Modern concepts in climate change centers and institutes are reviewed, showcasing innovative approaches and technologies that are shaping the field of climate science and its application to agriculture. The chapter concludes with strategies for combating food security and global warming challenges. It emphasizes the need for continued research, international collaboration, and the adoption of effective climate-smart practices to ensure sustainable agricultural systems and enhance global food security.

Climate change exposes onion production to irregular rainfall, heat, drought, flooding and increasing pest and disease pressure. These stresses can reduce yield, damage bulb quality, increase storage losses and threaten smallholder livelihoods. This chapter uses research literature and case studies to examine resilience at farm, community and supply-system levels. It emphasizes location-specific varieties, crop rotation, micro-irrigation, efficient input use, digital forecasting, protected production, improved storage and reliable cold chains. Farmer organizations, extension services, subsidies and supportive institutions are also important. Sustainable onion farming requires agronomic, technological, socioeconomic and policy measures to function together, enabling growers to adapt to climatic uncertainty while conserving resources and maintaining profitability.

Climate change and resource scarcity require farming systems that anticipate risks and make proactive decisions. This chapter explains how predictive modelling, artificial intelligence and IoT technologies can strengthen climate-smart agriculture. Statistical techniques, Convolutional Neural Networks, Long Short-Term Memory networks and Transformer models are examined for forecasting weather, crop performance and resource requirements. These tools can improve irrigation and fertilizer management, raise productivity and reduce environmental impact. Adoption remains constrained by poor-quality data, infrastructure deficiencies, cost, limited interpretability and unequal access to digital technology. Farmer-centred design, federated learning, gradual deployment and scalable systems are recommended for developing fair, practical and climate-resilient agricultural solutions.

Cocoa, Theobroma cacao is an important commercial plantation crop of humid tropics. It was introduced as a mixed crop in India and is cultivated in coconut and arecanut plantations large scale from 1970 onwards. It is grown as an under- storey intercrop with sufficient shade in southern states of India. Tamil Nadu is the major cocoa producing state in India. Some pests of economic importance are described hereunder:

Mealy bugs, Planococcus lilacinus (Ckll.) and P. citri (Pseudococcidae: Hemiptera)

These two species are most prevalent in all cocoa growing tracts of the country. Beside cocoa, it also infests coffee, citrus, guava, mango, etc. The adult female is an oval wingless insect which measures 4mm in length. The body colour is chocolate brown and the dorsal body surface is covered with thick waxy covering (Plate 14g). The male is winged and free living.

Plantation Crops

Plantation crops occupy an area of around 4 million hectares which is about 2.8 per cent of the total cropped area. However, the export potential of these crops is high and they account for 27 per cent of total agricultural export. The common plantation crops include coconut, oil palm, areca nut, tea, coffee, cocoa, cashewnut and rubber etc. Various pests infest these crops at different stages and cause economic damage. The crop wise details are as under:

Coconut Coconut,

Cocos nucifera also known as ‘Kalpa Vriksha’, as all the parts of the tree are utilized in one or other way. India is the largest producer of coconut in the world. Kerala, Karnataka, Tamil Nadu and Andhra Pradesh accounts for 90 per cent production of coconut. The other states namely West Bengal, Odisha ,Gujarat, Assam and Bihar contribute around 10 per cent of the total coconut producción. Pests at different stages of crop growth infest coconut tres, resulting in significant economic damage.

India produces two types of coffee i.e. arabica, Coffea arabica and robusta, C. canephora. The former has higher market value than the latter. Coffee is cultivated mainly in the Southern parts of India with Karnataka, Kerala and Tamil Nadu being the major coffee producing states. Some of the major pests which limits the cultivation of coffee are described below:

White stem borer, Xylotrechus quadripes Cheverolat (Cerambycidae: Coleoptera)

It is a serious pest of Arabica coffee in India. Alternate host plants include Robusta coffee, teak and Indian olive tree. Eggs are milky white when freshly laid but turns yellow later on. These are elongate, oval in shape and measures 1.25 –1.28 mm in length and 0.46 – 0.5 mm in width. The adult is a dark brown longicorn beetle (16mm long) and bears several white markings on the elytra (Plate 14c). The pale yellow stout full grown grub broader towards the anterior most region, measures 20-30 mm in length.

Objective: Explore and understand the key identical characteristics that differentiate the suborders Symphyta and Apocrita within the order Hymenoptera.

Objective: To explore and compare the taxonomic traits of beetles and weevils through detailed examination and suitable examples.

Objective: Aims to investigate and understand the distinguishing features of butterflies and moths, focusing on their unique traits and examples.

Objective: To investigate and compare the taxonomic traits of Heteroptera and Homoptera, two suborders within the order Hemiptera, commonly known as true bugs.

Objective: This practical aims to understand the taxonomic traits of Megaloptera and Planipennia, focusing on their unique features and differences.

Objective: To differentiate and identify orthopteroid and hemipteroid groups based on their distinct taxonomic characteristics.

Since the wide introduction of organochlorines and other synthetics in early 50’s farmers have heavily relied on the chemical pesticides for pest control. Over emphasis on chemical control has caused serious imbalances in the agro-ecosystem. The enormous quantities of chemicals, poisonous to microbial life, that fall on earth gets mixed up well with soil. Some problems like non-target effects of chemicals as well as latrogenic diseases are being experienced. Coupled with these, the increasing awareness of impeding pollution, health hazards and development of resistance have intensified the search for alternative strategies.

In the present investigation, the attempts have been made to test the stability and pest management efficacy of the plant extracts of some Indian medicinal plants, namely, Datura stramonium, Ricinus communis, Vitex trifolia and Nerium indicum. In the earlier chapters detailed methodologies and the results have been elaborated. This chapter embodes the comprehensive inter- and intra-comparative results and discussion on the basis of selected plants, extraction media, pest species and bioassay followed by conclusions.

The hot sterilized water extracts of R. communis were found to be more stable (i.e. 20 days to start the fermentation). In overall study the plant extracts were stable or viable means active for three to four weeks only. In most cases, the activity of cold and hot water extracts was found to be increasing with fermentation however the decrease in the activity of some extract was also observed.

The highest mean anti-fungal activity was reported for R. communis extracts followed by D. stramonium and N. indicum aqueous extracts, whereas no any anti-fungal potency was reflected by V. trifolia against test fungi species. R. communis and N. indicum extracts, the cold water method extraction showed greater positive effects in terms of mean anti-fungal potency as compared to the hot water extracts. The water extraction of D. stramonium was found to be more effective in anti-fungal activity study.

The Species Concept in Systematics

The modern biological or, more strictly, genetical concept of a species is a group of interbreeding organisms, genetically isolated from other such groups. The definition of the category species has long been one of the major problems of taxonomy. It is because of two reasons:

1. Because of the congruity of lingering typological concepts with the nature of evolving species.

2. Because evolutionary species may have changing characters and are only gradually differentiated in phylogeny.

For evolutionary study and descriptive purposes, many kinds of variation within species come in to consideration, but the only regular intra specific taxon is the subspecies. Subspecies are widely but not universally useful and their definitions yield to the same sort of criteria as for dividing other phylogentic continuance.

Super Species

According to Mayr (1931, 1942) Linsleg and Usinger (1953),“A super Species is a monophyletic group of very closely related and largely or entirely allopatric Species”.

Super species are, in other words, groups of populations that seem on other grounds (morphology, ecology etc.) to have passed beyond the point of potential interbreeding and to have acquired separate evolutionary roles. They are so by the more conclusive evidence of remaining separate when sympatric. It is to be assumed that they are still near the critical point of specification, near a definitive isolation. They are nascent species that will, if they survive, collectively form a subgenus or eventually a genus but have hardly get reached that degree of divergence.

They are not given special names; the Rules of Nomenclature make no provision for that usual designation and they are mostly known by the name of an included species and are in fact super species.

Introduction

The development of insecticide resistant populations of insect-pests, evidence of resistance, resurgence and environmental concerns have led to increased research for the alternative strategies to pesticides for control of damaging pest populations. Classical biological control and the success in that area are important and provide background and encouragement for increased efforts in the manipulation of natural enemies. Methods for manipulation of natural enemies for the purpose of reducing herbivore populations and alleviating plant stress include conservation and augmentation, habitat management and genetic manipulation.

Virtually all pest populations are affected by natural enemies to some extent. In many cases, natural enemies are the primary regulating force of the pest populations. Natural controls include effects of natural enemies (predators, parasites, pathogens), other biotic (living) factors such as food availability and competition, and abiotic (non-living) factors such as weather and soil. In pest management, biological control usually refers to the action of parasites, predators or pathogens on a pest population which reduces its numbers below a level causing economic injury. Herbivorous insects and pathogens that attack pest weeds are also considered biocontrol agents. Biological control is a part of natural control and can apply to any type of organism, pest or not, and regardless of whether the biocontrol agent occurs naturally, is introduced by humans, or manipulated in any way. Biological control differs from chemical, cultural, and mechanical controls in that it requires maintenance of some level of food supply (e.g., pest) in order for the bio-control agent to survive and flourish. Therefore, biological control alone is not a means by which to obtain pest eradication.

Introduction

Vegetables are preferable host to many insects because of their succulence and suitable nutritional status. All vegetables are attacked but degree of damage and number of pests varies depending upon the crop, variety and climate. Pest infestation in vegetables has been the main bottleneck in their economical production. The problem has more socio-economic dimensions because of rapid expansion of area under vegetables, intensive cultivation, round the year cultivation, export enhancement and health consciousness among the people.

The diamondback moth (DBM), Plutella xylostella (L.), is a major pest of brassica crops worldwide. DBM has been estimated globally to cost US$ 1 billion in direct losses and control costs. (Grzywacz et al., 2010)