Efficacy of some insecticides as trunk and foliar spray against mango mealy bug, Drosicha mangiferae Green (Margarodidae: Homoptera) in Haryana.
Lakra R. K., Zile Singh, Kharub W. S.
Author Affiliation: Department of Entomology, Haryana Agricultural University, Hissar, India.
Haryana Agricultural University Journal of Research 10 : 50-56
Abstract : The effectiveness of trunk and foliar sprays of 11 insecticides at various concentrations for the control of Drosicha mangiferae (Green) on mango was evaluated in field experiments in Haryana, India, in 1977-78. Percentage mortality of first-instar nymphs 3 days after trunk application and that of second-instar nymphs 2 and 6 days after foliar application showed that all the treatments were more effective than no treatment. Trunk sprays of quinalphos, diazinon and parathion-methyl (methyl-parathion) at 0.0.75-0.15, 0.05-0.1 and 0.05-0.1% were highly effective against ascending first-instar nymphs that had collected below bands. However, it was considered that treatment with these compounds at higher concentrations would give the trees greater protection. Foliar sprays of these 3 compounds at 0.075, 0.05 and 0.05%, respectively, also gave good control, the mortality of second-instar nymphs being 97.04, 93.50 and 93.08%.