Potential of Beauveria bassiana for biologic control of Apriona germari

Abstract

Apriona germari is a destructive stem-boring pest. To date, the control of the pest is still based largely on the chemical insecticides. To meet the needs of people’s high pesticide efficacy and environment safety, the alternative management strategy must be proposed. Beauveria bassiana is one of the most widely studied and used entomopathogenic fungi. The potential of Beauveria bassiana used to control Apriona germari was here evaluated. The result showed that the infective rate of B. bassiana to adults was 20%, with no pathogenicity to eggs. But it showed a high pathogenicity to larvae. The laboratory bioassays showed that the mortality, when concentration was 1 × 10⁸ conidia/mL, was 96.47% ten days after inoculation. LT₅₀ of B. beauveria to Apriona germari larvae was 4.53 d at the concentration of 1 × 10⁸ conidia/mL; LC₅₀ was 6.76 × 10⁵ conidia/mL. The infecting experiments in field showed that, 20 days after control, the mortality was 68.4%. The present results suggested that B. bassiana has an excellent potential for biological control of A. germari larvae.

Keywords

Apriona germari / Beauveria bassiana / biological control / potential

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Acknowledgements

This research was supported by the Natural Science Foundation of Hebei Province, China (No. C2011204041).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg