TITLE:
Evaluation of Insecticides for Control of Mango Mealybug (Drosicha mangiferae) in Bangladesh
AUTHORS:
N. Akhter, M. Z. Alam, M. A. Rahaman, M. R. U. Miah, I. H. Mian, M. A. Latif
KEYWORDS:
Mango Mealybug, Management, Insecticides
JOURNAL NAME:
Open Access Library Journal,
Vol.11 No.8,
August
28,
2024
ABSTRACT: Effectiveness of chemical insecticides namely Imidacloprid (0.4 g/L), Carbaryl (4 g/L), Thiamethoxam (0.4 g/L), Cypermethrin (1 ml/L), Carbosulfan (3 ml/L), Spinosad (0.4 ml/L), Dimethoate (2 ml/L) and Spirotetramate (2 ml/L) was evaluated to control 1st, 2nd, 3rd instar nymphs and adult females of mango mealybugs (D. mangiferae) at Entomology laboratory, Sher-e-Bangla Agricultural University. Imidacloprid, Carbaryl, Thiamethoxam, Cypermethrin, Carbosulfan, Spinosad, and Dimethoate gave 90% mortality of 1st instar nymph after 72 hr of spraying and dipping. At 2nd instar, Cypermethrin, Carbosulfan, Spinosad, and Dimethoate gave 91.67%, 88.33%, 85.00%, and 85.00% mortality respectively by spraying method after 72 hr of treatment. In the dipping method, the highest mortality (90%) was achieved with Cypermethrin which was statistically similar to Carbosulfan (88.33%), Spinosad (86.67%), and Dimethoate (85%). At this nymphal stage, the lowest (63.33%) mortality was observed under Spirotetramate. In the case of the 3rd instar, the highest (76.67%) and the lowest mortality (30.00%) was obtained with Cypermethrin and Spirotetramate respectively by spraying method. A similar trend was found in the dipping method. No mortality of adult females was found both in the spraying and dipping methods. Comparative susceptibility of 1st, 2nd, 3rd instars and adult females showed that the 1st instar nymph was more susceptible to all insecticides compared to 2nd, 3rd instar nymphs and adult females.