Susceptibility of Bryobia cristata (Acari: Tetranychidae) adults to infection by Metarhizium anisopliae and Beauveria bassiana

Document Type : Original research articles

Authors

Plant Protec. Res. Institute, Agric. Res. Center, Dokki, Giza, Egypt

Abstract

Laboratory bioassay of the two  entomopathogenic fungi  Metarhizium anisopliae (Metschnikoff)  Sorokin  and Beauveria bassiana  (Balsamo) Vuillemin (Ascomycota:  Hypocreales) against Bryobia cristata  (Duges)  (Acari: Tetranychidae) adults was evaluated.  M anisopliae had higher activity and rapid mortality against mite adults. The correspondent LC50  for M. anisopliae and B. bassiana was 1.82xl06 and 2.98xl06  spores/ml, respectively. The LT50  at dosage 108  spores/ml of M. anisopliae and B. bassiana was 2.2 and 4.08 days, respectively.

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