Abstract

RhizobacteriaPlant Growth-Promoting Regulators improve plant health and productivity by providing protection to plants from diseases and pests and enhancing plant growth. PGPR Induce Systemic Resistance ) against microbial pathogens and herbivorous insects. There are limited studies that show the induction of systemic resistance in crop plants against insect pests. Commonly used PGPR genera in insect pest control include Pseudomonas, Bacillus, Burkholderia, Xenorhabdus,Photorhabdus, Agrobacterium,Streptomyces etc. PGPR suppress the activity of insect pests by inducing systemic resistance that results in the production of secondary metabolites and some display direct insect pathogenicity. This chapter focused on PGPR-induced defense against insect pest in field crops with emphasis on the mechanism of action involved against insect pests. PGPR-mediated biochemical and physical changes in the host plants that display insect pathogenicity, methods mixtures application, and challenges associated with their use of PGPR in sustainable agriculture.