Fungal Biocontrol in Agriculture: A Sustainable Alternative to Chemical Pesticides – A Comprehensive Review

Fungal biocontrol agents (BCAs) have arisen as an ecologically sustainable agricultural substitute for conventional pesticides. This method provides valuable control over pests and plant diseases by utilizing fungi's naturally predatory and competitive characteristics, thereby minimizing the use of harmful synthetic chemicals. The mode of action is reviewed, and fungal BCAs are discussed, including Trichoderma spp., Beauveria bassiana, and Metarhizium anisopliae, whose pathogenicity, outcompeting ability, and production of secondary metabolites are known to inhibit pathogens. Employed as bio-controls, fungal BCAs also bring many environmental and health benefits by lowering pesticide resistance potential, minimizing ecological impact, and increasing soil health. In addition, compared to broad-spectrum chemical pesticides, fungal biocontrol agents are more specific and do not disturb beneficial organisms. These BCAs hold great promise, but their widespread use is limited by environmental sensitivity, high production costs, and limited shelf life of the formulation. Formulation and genetic engineering innovations are overcoming these challenges by improving the efficiency and scalability of fungal biocontrol products, including the multiple applications of synergistic compounds. In the face of climate change and the urgent need for sustainable agricultural methods, these fungal biological control agents (BCAs) will play an integral role in IPM, enabling sustainable, diverse, and resilient ecosystems that contribute to agricultural sustainability for the future. This review highlights the potential of fungal biocontrol as an effective tool for ensuring food security in the post-antibiotic era, with further development necessary to harness its complete potential on a global scale.