Efficacy of Beauveria bassiana Against Tobacco Whitefly and Brown Planthopper

Abstract

Tobacco whitefly and brown planthopper are one of the most important pests of tomato and rice. The objectives of this study were to test the efficacy of the entomopathogenic fungus, Beauveria bassianaagainst tobacco whitefly and brown planthopper, the experiment conducted in nymph and adult stages of insect pests. The results of tobacco whitefly testing revealed that spore suspension of B. bassiana at concentration of 1 × 108 spores/ml within 6 days of spraying showed 57.50% mortality in nymph stage and 65.00% mortality in adult stage. While, the results of brown planthopper testing revealed that spore suspension of B. bassiana at concentration of 1 × 108 spores/ml within 5 days of spraying showed 47.50% mortality in nymph stage and 62.50% mortality in adult stage. It proved that B. bassiana become the promising entomopathogenic fungus as a biological agent against plant pest.