Conventional pesticide formulations exert significant adverse effects on environmental quality, including soil degradation, groundwater contamination, and the accumulation of toxic residues in agricultural produce. Nanopesticide formulations have emerged as a promising alternative for mitigating these impacts through enhanced delivery efficiency, controlled release, and targeted action, thereby reducing the overall concentration of active ingredients required for effective pest control. By improving bioavailability and reducing off-target losses, nanopesticides can substantially minimize pesticide contamination of water resources and lower residual levels in crops, vegetables, and fruits. Furthermore, the application of nanotechnology in pesticide production has the potential to decrease manufacturing and application costs. Nanopesticides include different types, such as nanoinsecticides, nanoherbicides, nanofungicides, and nanoacaricides. Current global pesticide consumption exceeds 3.53 million metric tons annually in conventional formulations; adoption of nanopesticide technology could potentially reduce this volume by more than 80%. This chapter has its focus on the functional roles and applications of nanoinsecticides, nanoherbicides, and nanofungicides within integrated pest management systems.