Nanotechnology, the manipulation of materials at the nanoscale, has revolutionized agriculture, particularly in crop protection, by offering sustainable solutions to enhance productivity and mitigate environmental impacts. This chapter explores the application of nanotechnology in developing nanopesticides, nanofertilizers, and nanosensors, emphasizing their role in improving the efficiency and precision of agrochemicals while minimizing ecological harm. Nanopesticides ensure targeted pest control with reduced chemical loads, while nanofertilizers enhance nutrient delivery and plant resilience to stress. Nanosensors provide real-time pest and stress detection, enabling timely interventions. The chapter highlights the mechanisms through which nanoparticles interact with pests and plants, including improved bioavailability, controlled release, and elicitation of plant defense responses. It also discusses the integration of these innovations into sustainable agricultural practices, addressing challenges such as pesticide resistance, environmental toxicity, and regulatory hurdles. By advancing precision agriculture and reducing dependency on conventional agrochemicals, nanotechnology offers a transformative pathway to achieving global food security while preserving environmental integrity. With continued research and responsible implementation, nanotechnology can play a pivotal role in fostering resilient and sustainable agricultural systems.