Vol. 10, Issue 2 (2021)

Author(s):
NE Jayewar and DC Lokhande

Abstract:
A field experiment to study the Bio-efficacy of new combination formulation against Helicoverpa armiger on Groundnut (Arachis hypogea L.) was studied during September to December 2014, at Research farm, oilseeds research station, Latur. Groundnut crop was infested by Helicoverpa armiger. The experiment was laid out in randomized block design with seven treatment and three replications with view to find out the effective insecticide’s combination formulation and it’s most effective dose against Helicoverpa armiger of groundnut. Variety Phule Pragati (JL-24) was sown in September. The insecticide and combination formulation used for the treatment were Novaluron 5.25% + Indoxacarb 4.5% SC @ 825 ml/ha Novaluron 5.25% + Indoxacarb 4.5% SC @ 875 ml/ha, Novaluron 5.25% + Indoxacarb 4.5% SC @ 925 ml/ha, Novaluron 10% EC @ 750 ml/ha, Indoxacarb 14.5% SC @ 400 ml/ha, Methomyl 40% SP @ 850 g/ha, along with one untreated control. The results of present investigation clearly showed that the Novaluron 5.25 + Indoxacarb 4.5% SC @ 875 & 925 ml/ha is equally effective in lowering the infestation of H. armiger. Further, protection with the chemical pesticide, Novaluron 5.25 + Indoxacarb 4.5% SC (@ 875 & 925 ml/ha) produced groundnut yield with cost benefit ratio comparable to recommended chemical insecticides.