Evaluation of Entomopathogenic Fungi for the Management of Tobacco Caterpillar Spodoptera litura (Fabricius) (original) (raw)

Indian Journal of Plant Protection, 2012

Abstract

The efficacy of two entomopathogenic fungi, Beauveria bassiana and Metarhizium anisopliae, against tobacco caterpillar, Spodoptera litura (Fabricius) is a polyphagus noctuid pest inflicting heavy losses on many of the cultivated crops were studied under laboratory and field conditions. The estimated LC50 value of B. bassiana and M. anisopliae towards third instar larvae of S. litura were 50.31 x 105 conidia/ml and 16.52 x 105 conidia/ml, respectively. The LT50 value of B. bassiana and M. anisopliae at the concentration of 108 conidia ml−1 against third instar larvae of S. litura were 5.49 and 4.79 days, respectively. The incidence of Spodoptera litura population from two rabi crop seasons revealed that S. litura population was positively correlated with maximum temperature, minimum temperature, wind velocity and sunshine hours, whereas negatively correlated with RH I and RH II. The correlation was non significant between maximum temperature, but significant with wind velocity and su...

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