Field evaluation of some new insecticides against mango leaf weevil, Rhynchaenus mangiferae Marshall (Coleoptera: Curculionidae).
Shukla R. P., Prasad V. G.
Author Affiliation: Indian Inst. Hort. Res., Bangalore 560?080, India.
Indian Journal of Entomology 47 : 300-303
Abstract : A field trial was carried out in Karnataka, India, in 1980 to determine the effectiveness of 8 insecticides against Rhynchaenus mangiferae on mango. The synthetic pyrethroids permethrin and fenvalerate, both at 0.02%, and monocrotophos at 0.05% were the most effective, resulting in 100% mortality of the pest for up to 15 days after application. The systemic insecticides phosphamidon, dimethoate and methyl demeton [demeton-S-methyl], all at 0.05%, were moderately effective, causing 85-90% mortality for up to 15 days. Malathion was the least effective compound, and carbaryl was slightly more effective than malathion. The results suggested that effective control of the pest could be obtained with alternate sprays of either permethrin or fenvalerate and monocrotophos during emergence of new growth.