Vol. 11, Issue 9 (2022)

Author(s):
GP Harke, PS Neharkar and PR Zanwar

Abstract:
The investigation on effect of neonicotinoides, organophosphate, and spinosyn class of insecticides on visits of honey bee species on safflower crop were conducted on research farm of Department of Agricultural Entomology, College of agriculture, V.N.M.K.V. Parbhani (MS). The present result indicate that the frequency of visits of both bee species i.e. Apis mellifera and Apis cerana were uniform before spraying. However the intensity of bee visits falls down significantly on one day after spraying in each chemical treatment. Exposure of clothianidin 50% WDG found to be most hazardous to bee species which affected specificity of long term memory as well as affect successful returning of flights. Insecticide like imidacloprid 17.8% SL showed symptoms like impair honey bee navigation, decreased foraging activity on food sources and also had negative effect observed on olfactory learnt discrimination task. Symptoms like increase in responsiveness of water by Apis mellifera was observed when bees comes in contact with flowers sprayed by acetamiprid 20% SP. Thiamethoxam reduced foraging rates to nests, impair navigation, flight activity or both. The acetamiprid 20% SP found to be less toxic insecticide as compared to other insecticides for bee species.