Annals of Plant Protection Sciences
  • Year: 2010
  • Volume: 18
  • Issue: 1

Evaluation of Insect Growth Regulatory Activity of Neem formulation against Helicoverpa armigera (Hubner)

  • Author:
  • D. Srinivasa Reddy, Chitra Srivastava, B.S. Gotyal
  • Total Page Count: 5
  • Page Number: 77 to 81

* Division of Entomology, Horticultural Research Station, Anantrajupet, A.P.

** Division of Entomology, CRIJAF, Barrackpore-700 120, India.

Division of Entomology, Indian Agricultural Research Institute. New Delhi-110 012.

Abstract

Ten commercially available neem formulations viz.. vijayneem (0.15 EC), achook (0.15 EC), econeem (O.30EC and 1.00EC), gronim (0.30Ec and 0.15EC), neemgold (0.03EC), nimbecidine (0.03EC) and neemazal (1EC and 5EC) were evaluated for insect growth regulatory activity (IGRA) against third instar larvae of, Helicoverpa armigera. Maximum larval mortality (50.0%) was observed for gronim 0.15EC and econeem lEC at 0.08% concentration whereas neemgold and nimbicedine showed 46.6 and 40.0% larval mortility, respectively at 0.2% concentration only. Neemgold (0.01%) showed highest pupal mortality. The data for the lethal growth inhibition revealed that neemgold 0.03 EC has lowest GI50 value of 0.0038% ans was the best formulation tested for its IGRA against H. armigera in vitro.

Keywords

Helicoverpa armigera, IGRA, Neem formulations