MANAGEMENT OF MEALYBUG (PARACOCCUS MARGINATUS) IN PAPAYA PLANT

Abstract

The experiment was conducted at the Horticulture Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from September 2011 to May 2012 to study the management of mealybug in papaya plant. The experiment consists of ten treatments chemicals pesticide including control treatment for management of mealybug in papaya seedling viz. T1 = Shobicron 425EC, T2 = Imidacloprid (Admire) 200SL, T3 = Semcap 50EC, T4 = Cypermethrin 10EC, T5 = Fighter 25EC, T6 = Chloropyriphos 20EC, T7 = Dimethoin 40EC, T8 = Imidacloprid (Bumper) 200SL, T9 = Decis 25EC and T10 = Control. The experiment consists of eight treatments including control treatment for management of mealybug in papaya plant viz. T1 = Shobicron 425EC, T2 = Imidacloprid 200SL, T3 = Cypermethrin 10EC, T4 = Deltamethrin 25EC, T5 = Lambdacyhalothrin, T6 = Semcap 50EC, T7 = Neem seed kernel extract and T8= Control. The experiment was laid out in Randomized Complete Block Design (RCBD) single factor with three replications. Significant differences were observed among different management practices in terms of seedling, plants, leaves and fruits infestation during the management of papaya mealy bug. Imidacloprid (Admire and Bumper) 200SL was the most effective on mealybug control as well as lowest number of infested seedling was recorded. The lowest number of infested plant, number of leaf infestation, number of infested fruits plant was recorded from Imidacloprid 200SL. The highest number of healthy plant per plot, number of healthy leaf per plant, healthy fruit was found in Imidacloprid treated plot. Imidacloprid gave the maximum protection of papaya in field from mealybug infestation.