D. Rambabu, K. R. Viswakarma , Y. G. Thundu, L. Kanneboina Nano, particles, plant, diseases, management 25-27 Volume 2 (2) March 2026 Recent developments in nanoscience have introduced new possibilities for managing plant diseases with greater precision and reduced environmental impact. Materials at the nanoscale (approximately 10–100 nm) exhibit distinct physical and chemical behaviors that make them suitable for agricultural applications, both as active antimicrobial agents and as delivery vehicles for crop protection compounds. Various metal-based nanoparticles, including silver, copper, zinc oxide, and titanium dioxide, have demonstrated effectiveness against a broad spectrum of plant pathogens. Among these, silver-based nanomaterials are particularly noted for their wide-ranging antimicrobial performance and compatibility with biologically derived synthesis approaches. Biopolymer-based nanoparticles, especially those derived from chitosan, offer additional advantages such as environmental compatibility, natural degradation, and the ability to stimulate plant immune responses. Beyond their direct protective roles, nanoparticles can serve as carriers that improve the dispersion, persistence, and controlled release of agrochemicals and nucleic acid-based treatments.