Biotic stress threatens sustainable agriculture by causing economic losses, reduced yields, and environmental harm. Conventional methods like chemical pesticides worsen these issues by fostering pest resistance, harming non-target species, and endangering pollinators. Nanoformulations techniques, like nanoprecipitation, nanoparticles, and nanocapsules, offer precise and targeted biotic stress management. Microbial nanoformulation, which uses microbes to synthesize nanoparticles, represents a significant advancement, enabling environmentally friendly production. These microbial-assisted nanoparticles enhance the stability and effectiveness of nanoformulations, providing a natural means to control pests and diseases. Despite challenges in maintaining formulation stability and scaling up production, nanoparticle-based technology holds promise for sustainable agriculture. Achieving targeted delivery and controlled release of nanoscale products is crucial for mitigating biotic stress with minimal environmental impact, ensuring food security. Integrating nanoparticle formulations with integrated pest management (IPM) strategies enhances efficacy and reduces reliance on traditional pesticides. Nanoformulated pesticides, applied at lower rates and with reduced off-target effects, support environmental sustainability and lower agriculture’s ecological footprint. Microbial nanoformulation techniques further improve outcomes by leveraging microbes’ natural abilities to produce and stabilize nanoparticles, fostering resilient and sustainable agricultural systems. This chapter highlights the potential of nanoformulation, including microbial-assisted approaches, to enhance global food security, promote sustainable practices, and reduce environmental degradation, guiding agriculture toward a resilient and eco-friendly future.