Abstract
The efficacy of entomopathogenic fungi from genus Lecanicillium , Isaria , Beauveria, and Purpureocillium were tested against larvae and adults of bean weevil ( Acanthoscelides obtectus Say.). Some strains of Lecanicillium , Isaria and Beauveria showed obvious efficacy against adults of bean weevil but no treatment of bean seeds prevented the reproduction of adults, oviposition nor subsequent infestation of bean seeds. Keywords: entomopathogenic fungi, bean weevil, biological control
Highlights
In recent decades intensive development of biological control of pests plays an important role in integrated pest management
Six strains of entomopathogenic fungi were tested against adults and larvae of bean weevil, from which 2 strains were L. muscarium (LM OP1 and LM CCF 3297), 1 strain B. bassiana (BB AGTA5), 2 strains I. fumosorosea (IF AGTA7, IF CCF 2790), and 1 strain P. lilacinum (PL CCF 3531)
Any treatment did not prevent from the reproduction of adults, oviposition nor subsequent infestation of bean seeds
Summary
In recent decades intensive development of biological control of pests plays an important role in integrated pest management. Entomopathogenic fungi belonging to the genera Beauveria, Lecanicillium, Metarhizium, Isaria and Hirsutella are the best known and most frequently used in biological control of pests (Grent, 2011; Koubová, 2009). Fungi of Lecanicillium genus are important pest pathogens These genus was formerly classified in the genus Verticillium including species V. lecanii. I. fumosorosea was detected as a naturally occurring pathogen of whiteflies populations, but it is highly virulent against aphids, thrips, larvae of some butterfly species, larvae and pupae of leafminers, and even against red spider mite (Koubová, 2009). Under certain circumstances, this strain acts as a mycoparasite, it can infect the rust or powdery mildew of some crops. The efficacy of entomopathogenic fungi was investigated against various species of insect, but against been weevil very few records are available.
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