Abstract

Plants employ a combination of direct and indirect defense strategies to safeguard themselves against insect herbivores. Direct defenses include both physical and chemical barriers that work together to hinder the growth, development and reproduction of these insects. In contrast, indirect defenses discourage herbivores by releasing volatile substances which attract their natural predators rather than directly harming them. This chapter explores the multifaceted connections that exist between plants and insects, emphasizing chemicals, compounds derived from proteins and plant volatiles, while insects employ strategies such as metabolization, sequestration, or avoidance. Consequently, the link between plants and insects is intricate, multi-layered and incorporates a variety of macro and microorganisms in both space and time. Exploring these interconnected relationships offers a complete picture of the natural world.