Efficacy of Entomopathogenic Fungi in Controlling Greenhouse Whitefly, <I>Trialeurodes vaporariorum</I> Westwood
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Abstract
The objective of this research is to study on the efficacy of entomopathogenic fungi in controlling Greenhouse Whitefly, Trialeurodes vaporariorum Westwood in the Laboratory condition. Entomopatogenic fungi at concentration of 1x108 spores/ml from 29 isolates of 17 species in 5 genera were applied on the second instar nymphs of greenhouse whitefly, T. vaporariorum Westwood. The result revealed that only 6 isolates of 6 species in 3 genera had ability to kill the greenhouse whitefly with mortality rate between 3.85-92.44 %. Paecilomyces tenuipes isolate Pt 6073 was the most effective to control the second instar nymphs of greenhouse whitefly with the mortality of 92.44% follow by those of Metarhizium anisopliae isolate BCC 4849 was 72.67%. with at 2.219 x 106 and 1.005 x 107 spores/ml respectively at 7 days after application.
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