Insect Pest Dynamics in Paddy Ecosystems with Special Reference to Climate Variability

Rice (Oryza sativa L.) is one of the most important staple food crops worldwide, particularly in tropical and subtropical regions. Paddy ecosystems support a complex assemblage of insect communities, including major and minor pests, natural enemies, and neutral species, all of which are influenced by environmental conditions. In recent decades, climate variability characterized by fluctuations in temperature, rainfall patterns, humidity, and extreme weather events has significantly altered the population dynamics, distribution, and outbreak potential of rice insect pests. Changes in climate parameters affect insect physiology, reproduction, survival, migration, and interactions with host plants and natural enemies. This chapter examines the dynamics of insect pests in paddy ecosystems with special emphasis on the influence of climate variability. It discusses major rice insect pests, their population ecology, climate-driven changes in pest incidence, pest–natural enemy interactions, and the implications for sustainable pest management. Understanding these dynamics is essential for developing climate-resilient integrated pest management strategies to ensure stable rice production under changing environmental conditions.