A Comprehensive Review of the Synergistic Effects of Multidimensional Mechanisms in Insect Insecticide Resistance

Insecticides are essential for modern agriculture, but growing insect resistance presents a major global challenge. Insects develop resistance through multiple pathways: they change behaviors to avoid exposure, enhance internal detoxification systems, undergo genetic modifications that improve survival, use epigenetic mechanisms to adjust gene expression without altering DNA, and recruit gut bacteria for detoxification support. These mechanisms often work together, though their interactions and relative importance remain poorly understood, creating knowledge gaps that hinder effective resistance management. This review examines how insects achieve insecticide resistance, a problem affecting both agricultural productivity and public health worldwide. Using literature from 2010-2024, with emphasis on multi-omics approaches and functional validation studies, we analyze resistance pathways and evaluate evidence across mechanisms ranging from established target-site and metabolic resistance to emerging epigenetic and microbiome contributions. We argue that integrated pest management, combining multiple strategies informed by quantitative analysis of mechanism contributions, is essential for sustainable agriculture. Future research should adopt systems-level approaches to quantify mechanistic interactions and validate emerging factors like epigenetics and microbiomes using CRISPR and gnotobiotic models. Developing realistic laboratory systems to predict resistance evolution is equally important for protecting food security and environmental health.