Field evaluation of insecticides and biopesticidesfor the control of marginal gall thrips,Liothrips karnyi (Bagnall) on Black pepper

Abstract

The black pepper is attacked by wide range of insect pests and amongthem marginal gall thrips L. karnyi is a serious pest in higher altitudesand nurseries in the plains. Apart from the formation of galls, growthof the vine and formation of spikes may be affected adversely.Therefore studies were conducted on the field evaluation of differentinsecticide molecules and biopesticides against this pest atKyadagimane village, Sirsi tq., Uttara Kannada district. The resultsindicated that, sprays of flonicamid 50 WG, spinosad 45 SC andacetamaprid 20 SP were effective in controlling pest infestation with87.56 (6.66 individuals/leaf), 78.61 (11.41 individuals/leaf) and 76.54(12.26 individuals/leaf) per cent pest population reduction over control(55.3 individuals/leaf). Among the biopesticides tested, garlic chillikerosene extract and azadirachtin were found superior in suppressingthe thrips population with 65.42 and 58.53 per cent reduction overcontrol