Journal of Biological Control

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Metarhizium anisopliae var. anisopliae is found on the larvae of sugarcane internode borer, Chilo sacchariphagus indicus (Kapur) under field conditions at Coimbatore. In laboratory tests, the fungus caused 20.0 to 83.3 per cent mortality in third instar larvae and 10.0 to 90.0 per cent mortality in fourth instar when treated with different doses ranging from 104 to 109 spores/ml. The time taken to kill the larvae varied from 5.6 to 13.1 days in third ins tar and 5.9 to 9.9 days in fourth instar. The mean number of spores produced per dead larva varied from 0.17 × 109 to 0.48 × 109 in third instar and 0.92 × 109 to 1.52 × 109 in fourth instar.

Keywords

Chilo sacchariphagus indicus, First Report, Metarhizium anisopliae, Pathogenicity.
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