Diamond Back Moth (Plutella xylostella), is one of the most serious pests on cruciferous crops. The insecticidal activities of the metabolites produced by Serratia marcescens (CBCC 47) grown in different fermentation media were determined by testing the crude extract against diamond back moth(Plutella xylostella). The larvicidal activities of the isolates varied when grown in different medium and growth conditions. When grown in Soy-NaCl-yeast extract-glucose medium, the extract produced was more toxic, indicating an enhanced production of the metabolites. Toxicity assays showed that the toxins produced from the novel growth media were more effective in killing larvae of DBM (Diamond Back Moth) as compared to that produced from NB (Nutrient broth) medium. These observations suggest that soy-NaCl-yeast extract-glucose medium can serve as a cheap source of medium for the production of non-hazardous, biodegradable and economically viable biocide formulations based on the metabolites of the isolated Serratia marcescens.
Biocide Formulation, Biodegradable, Diamond Back Moth, Non-Hazardous, Secondary Metabolites, Serratia marcescens
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