Microbial entomopathogens that include fungi, bacteria, viruses, and nematodes have long been valued for their role in biological control of insect pests. However, recent research highlights their expanded applications beyond pest management. Entomopathogenic fungi such as Beauveria bassiana and Metarhizium spp. are increasingly recognized for their potential as biocontrol agents in integrated pest management systems. These fungi exhibit not only direct insecticidal effects but also secondary metabolites that contribute to plant disease suppression, thereby enhancing crop health and yield. Bacterial entomopathogen Bacillus thuringiensis, as the most widely used biopesticide, has also demonstrated potency not only against insects but also as systemic resistance inducer, thereby boosting plant immunity against pathogens. Moreover, entomopathogens are emerging as growth promoters and biostimulants, enhancing crop vigor through nutrient uptake and root development. This review consolidates current knowledge on the mechanisms of action of microbial entomopathogens against pests as well as current understanding on its other plant-beneficial traits. It also discusses their environmental impact and potential integration into sustainable agricultural practices. This comprehensive exploration underscores the transformative potential of microbial entomopathogens in shaping future strategies for holistic crop health management including pest management in agriculture.

ARRI Assam Agricultural University Titabor Jorhat 785630 India

Department of Plant Pathology AAU Jorhat 785013 India

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