Efficacy of Metarhizium anisopliae Biopesticide Compared with Two Chitin Synthesis Inhibitors Hexythiazox and Etoxazole in Tetranychus urticae Koch Management

Document Type : Original Article

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Plant Protection Department, Faculty of Agriculture, Fayoum University, Fayoum 63514, Egypt

Abstract

The biopesticide of Metarhizium anisopliae and two chitin synthetic inhibitors, Etoxazole and Hexythiazox, were utilized at recommended doses for comparative purposes. Our investigation illustrates their effect on the reduction of Tetranychus urticae population and biological aspects. The obtained results indicated that M. anisopliae is capable of reducing the mite stages by a high percentage after one day of treatment (71.81, 72.02 and 69.87) for eggs, immatures and adults, respectively. The hatchability % was 0.6, 9.99, 98.8, and 99.3% on etoxazole, hexythiazox, M. anisopliae treatments and control, respectively. Adulticidal efficacy was evaluated; incubation periods for both sexes were prolonged with all treated pesticides. A highly significant decline in fecundity in females was observed when using hexythiazox and M. anisopliae (42.5 and 35.3 egg/female). The present study provides practical data on their effectiveness in reducing T. urticae populations as agents eco-friendly for mite management. Moreover, it was found that M. anisopliae biopesticide was better at reducing mite populations and female fecundity than etoxazole and hexythiazox. Our investigation confirmed the effectiveness of etoxazole and hexythiazox as ovicides. 

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