Control of Heliothis armigera (Hbn.) on Chickpea with Controlled Droplet Application of Nuclear Polyhedrosis Virus in Combination with Endosulfan and Boric Acid
Results of a laboratory experiment showed that boric acid 1% or magnesium sulphate at 0.5 and 1.0% increased the mortality of second instar larvae of Heliothis armigera (Hbn.) due to nuclear polyhedrosis virus. In the field experiment with chickpea cv. Shoba, application of NPV @ 250 LE + boric acid 125 g/ha significantly reduced the larval population over application of NPV alone. Addition of endosulfan 175 g a.i/ha to a mixture of NPV 125 LE + boric acid 125 g/ha was significantly more effective than application of NPV + boric acid in controlling Heliothis armigera larvae. However, a combination of NPV 250 LE + endosulfan 175 g a.i./ha was the most effective in controlling the pest and increasing the yield.