Journal of Biological Control

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Bioefficacy of White Muscardine Fungus, Beauveria bassiana (Balsamo) Vuillemin and Entomopathogenic Nematode, Heterorhabditis indica (Poinar) against Rice Blue Beetle, Leptispa pygmaea Baly


Affiliations
1 Regional Agricultural Research Station, Pattambi 679 306, Kerala, India
2 College of Horticulture, Vellanikara 680 656, Kerala, India
 

Laboratory studies were conducted during the year 2005-2006 to find out the efficacy of the white muscardine fungus, Beauveria bassiana (Balsamo) Vuillemin and the entomopathogenic nematode, Heterorhabditis indica (Poinar) against adult and grubs of rice blue beetle, Leptispa pygmaea Baly. B. bassiana caused a cumulative adult mortality of 56.67-80.00 per cent at 105-109 spores ml-1 and the LC50 value was 2.26x104 spores ml-1. The entomopathogenic nematode, H. indica caused a cumulative mortality of 66.67-91.67 per cent at concentrations of 5IJs to 9IJs in the grubs of L. pygmaea. The cumulative LC50 value was 3.83IJs. The mortality of L. pygmaea was found to increase with reducing dose and increasing exposure period of both B. bassiana and H. indica. The effective pathogenicity of B. bassiana and H. indica against L. pygmaea is reported for the first time.

Keywords

Beauveria bassiana, Heterorhabditis indica and Rice Blue Beetle.
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  • Bioefficacy of White Muscardine Fungus, Beauveria bassiana (Balsamo) Vuillemin and Entomopathogenic Nematode, Heterorhabditis indica (Poinar) against Rice Blue Beetle, Leptispa pygmaea Baly

Abstract Views: 227  |  PDF Views: 136

Authors

K. Karthikeyan
Regional Agricultural Research Station, Pattambi 679 306, Kerala, India
Sosamma Jacob
College of Horticulture, Vellanikara 680 656, Kerala, India

Abstract


Laboratory studies were conducted during the year 2005-2006 to find out the efficacy of the white muscardine fungus, Beauveria bassiana (Balsamo) Vuillemin and the entomopathogenic nematode, Heterorhabditis indica (Poinar) against adult and grubs of rice blue beetle, Leptispa pygmaea Baly. B. bassiana caused a cumulative adult mortality of 56.67-80.00 per cent at 105-109 spores ml-1 and the LC50 value was 2.26x104 spores ml-1. The entomopathogenic nematode, H. indica caused a cumulative mortality of 66.67-91.67 per cent at concentrations of 5IJs to 9IJs in the grubs of L. pygmaea. The cumulative LC50 value was 3.83IJs. The mortality of L. pygmaea was found to increase with reducing dose and increasing exposure period of both B. bassiana and H. indica. The effective pathogenicity of B. bassiana and H. indica against L. pygmaea is reported for the first time.

Keywords


Beauveria bassiana, Heterorhabditis indica and Rice Blue Beetle.

References