Author(s):

Jai Kishan Bhagat, VK Soni and HK Chandraker

Abstract: Experiments on incidence of Helicoverpa armigera and its natural enemies in chickpea was studied during 2016-17 and 2017-18 at the area of Kabirdham districts of Chhattisgarh at blocks viz., sahaspur-Lohara and in each block fields were selected during 2016-17 and 2017-18. On the basis of pooled mean various abiotic parameters viz., the population of H. armigera larva Showed non-significant and negative correlation with maximum temperature (⁰C) (r = - 0.448) but minimum temperature (⁰C) (r = - 0.540*) negative significant correlation with H. armigera and regression line was worked out for no. of H. armigera larvae Y₁= -0.274 X₂+ 5.940 R² 0.29. Rain fall (r = 0.204), wind velocity (r = - 0.329) and sunshine hours (r = 0.013) are positive non-significant but relative humidity (r = 0.845**) highly positive significant correlation with H. armigera larva population and regression line was worked out for no. of H. armigera larvaeY₁ = 0.143 X₃ - 8.564, R² 0.71. Pooled mean data, the ento-pathogenic virus NPV infected larvae was Showed non-significant and negative correlation with maximum temperature (⁰C) (r = - 0.506), minimum temperature (⁰C) (r = - 0.473) and sunshine hours (r = 0.123). Rain fall (r = 0.231), wind velocity (r = 0.424) positive non-significant correlation was observed but morning relative humidity (r = 0.812**) highly positive significant correlation with NPV infected larvae and regression line was worked out for no. of NPV infected larvae Y₂ = 0.011 X₃ - 0.752, R² 0.71. Basis of pooled mean data, the larval parasitoid, Campolestis chlorideae was showed non-significant and negative correlation with maximum temperature (⁰C) (r = - 0.430), minimum temperature (⁰C) (r = - 0.511) and Sunshine hours (r = - 0.108). Rain fall (r = 0.003), Wind velocity (r = 0.435) are non-significant and positive correlation but Relative humidity (r = 0.746**) is highly significant positive correlation and regression line was worked out for no. of Campolestis chlorideae parasitoid larvae Y₃ = 0.016 X₃- 0.990, R² 0.55.

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