Control of Heliothis armigera (Hbn.) on Chickpea with Controlled Droplet Application of Nuclear Polyhedrosis Virus in Combination with Endosulfan and Boric Acid

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Authors

  • Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641003 ,IN
  • Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641003 ,IN

DOI:

https://doi.org/10.18311/jbc/1987/15427

Keywords:

Nuclear Polyhedrosis Virus, Boric Acid, MgS04, ZnS04, Endosulfan, Heliothis armigera, Control, ULV, Chickpea.

Abstract

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.