Evaluation of biorationals and insecticides against Spodoptera exigua (hub.) in chickpea

Abstract

In recent years Spodoptera exigua (Hubner) is emerging as an important pest of chickpea, especially in South Central India where it is an economic pest of chickpea. The management of cutworm S. exigua on chickpea was under taken in detail under field condition. The experiment was conducted to evaluate the efficacy of different biorationals and insecticides against S. exigua larvae at Main Agricultural Research Station, Raichur during Rabi, 2016-17. There were 10 treatments in the experiment the results revealed that the mean number of larvae per meter row length of crop was in the range of (0.51 to 4.00). Least number of larvae per meter row length was recorded in spinosad (0.51) which was on par with cypermethrin 0.57, followed by lambda cyhalothrin (1.97) which was on par with B. thuringiensis (2.04), M. anisopliae (2.10), N. rileyi (2.64). Highest mean number of larvae per one meter row length of crop was recorded in pongamia oil (4.00) followed by malathion (3.90), B. bassiana (3.09). The yield data obtained after harvest of the crop indicated the maximum yield (12.02 q ha-1) was recorded in spinosad followed by cypermethrin (11.53 q ha-1). Among biorationals N. rileyi recorded highest yield (10.05 q ha-1) followed by B. thuringiensis (9.80 q ha-1).