Field evaluation of spinetoram 12 SC mixtures against blue butterfly, Lambides boeticus on pigeonpea

Abstract

Pigeonpea pods are infested by several pod borers. Lambides boeticus is the predominant pod borer species in Tamil Nadu in pigeonpea and responsible for considerable yield loss. Effect of a new biological insecticide molecule, spinetoram 12 SC alone and in combination with quinalphos 25 EC 350 g a.i./ha, carbendazim 50 WP 125 g a.i./ha and urea (2%) was studied on L. boeticus at field conditions during 2012-2013 and 2013-2014 kharif seasons. The results of the field experiments showed that Spinetoram 12 SC 45 g alone and in combination with quinalphos 25 EC 350 g a.i./ha, carbendazim 50 WP 125 g a.i./ha and urea (2%) were significantly effective in minimizing the L. boeticus when sprayed thrice at 15 days interval and increases the grain yield. All the tested doses of spinetoram 12 SC 45 g alone and in combination with quinalphos 25 EC 350 g a.i./ha, carbendazim 50 WP 125 g a.i./ha and urea (2%) were showed nil phytotoxic symptoms on pigeonpea plants.