Evaluating the Biological Potential of Prodigiosin from <i>Serratia Marcescens</i> KH-001 Against Asian Citrus Psyllid

Abstract The insecticides of microbial origin may be promising biocontrol agents to control pests. In this study, a major metabolite was extracted and purified from Serratia marcescens KH-001 identified as prodigiosin with molecule weight 324.2094, our primary aim evaluate the effects against Diaphorina citri Kuwayama (Hemiptera: Liviidae) in laboratory field. Toxicity nymphs increased increasing temperature 25 35°C. experiment results observed inhibition at LC50 on oviposition egg hatch D. 30°C. Furthermore, adults that fed citrus leaves treated LC20 solution 30°C excreted less honeydew (28–35%) compared controls, suggesting moderate antifeedant activity prodigiosin. field showed 10% emulsifiable concentrate exhibited better efficacy (70–100%) three concentrations (100, 200, 500 mg/liter) July August than October. These data indicate will highly effective compound for depending prevailing conditions become commercially available product widely used orchards.