Effect of Temperature on Pathogenicity of Beauveria bassiana (Balsamo) Vuillemin and Metarhizium anisopliae (Metschnikoff) Sorokin against Spilosoma obliqua (Walker)

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Authors

  • Department of Entomology, G. B. Pant University of Agriculture & Technology, Pantnagar- 263145, Uttaranchal ,IN

DOI:

https://doi.org/10.18311/jbc/2008/3802

Keywords:

Beauveria bassiana, Metarhizium anisopliae, Pathogenicity, Spilosoma obliqua, Temperature.

Abstract

Pathogenicity of Beauveria bassiana to Spilosoma obliqua larvae was higher at low temperature (20°C) compared to higher temperature (30°C). The LC50 values of B. bassiana at 20 and 30°C were 8.63 and 17.8í— 106 conidia ml−1 against second instar larvae, 16.4 and 62.3í—106 against third instar, and 33.7 and 70.2í—106 conidia ml−1 against fourth instar, respectively. The LT50 values at 20°C temperature were 155.4, 159.0 and 162.9 hours to second, third and fourth instar larvae, respectively, compared to 167.6, 168.9 and 169.8 hours, respectively, at 30°C temperature. The LC50 values of Metarhizium anisopliae against S. obliqua at 20°C temperature was 54.1, 66.2 and 73.8í—106 conidia ml−1 against second, third and fourth instar larvae, respectively, which was 1.58, 1.14 and 1.08 fold lower than values obtained at 30°C temperature, i.e., 58.7, 75.1 and 80.1í—106 conidia ml−1, respectively. Similarly, the LT50 values at 20°C were 161.3, 162.9 and 169.5 hours against second, third and fourth instar larvae, respectively, which were 1.08, 1.08 and 1.05 fold lower than LT50 obtained at 30°C temperature, respectively.

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Published

2008-06-14

How to Cite

Pandey, A. K. (2008). Effect of Temperature on Pathogenicity of <I>Beauveria bassiana</I> (Balsamo) Vuillemin and <I>Metarhizium anisopliae</I> (Metschnikoff) Sorokin against <I>Spilosoma obliqua</I> (Walker). Journal of Biological Control, 22(1), 85–89. https://doi.org/10.18311/jbc/2008/3802

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