MANAGEMENT OF WHITEFLY AND THRIPS IN MUNGBEAN WITH SOME SELECTED INSECTICIDES

Abstract

The experiment was conducted at the central farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period of March to May, 2014 to study the whitefly and thrips incidence in mungbean and their management. BARI Mung-5 was used as the test crop of this experiment. The experiment consists of the following treatments: T1: Nitro 505EC (Chloropyrifos + Cypermethrin) @ 2 ml/L of water at 10 days interval; T2: Casper 5SG (Emamectin Benzoate) @ 2gm/L of water at 10 days interval; T3: Voliam Flexi (Thiamethoxam + Chlorantraniliprole) @ 1.0 ml/L of water at 10 days interval; T4: Tapnor 40EC (Dimethoate) @ 2.0 ml/L of water at 10 days interval; T5: Allion 2.5EC (Lamda-Cyhalothrin) @ 1.0 ml/L of water at 10 days interval; T6: Admire 200SL (Imidacloprid) @ 0.5 ml/L of water at 10 days interval and T7: Control. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The lowest number of whitefly infestation per plant at vegetative (4.18) and reproductive stage (2.13) was recorded from T6 while the highest number of whitefly infestation per plant at vegetative (14.44) and reproductive (8.10) stage was recorded from T7 (Control) treatment. The lowest number of thrips infestation per 10 flower (1.88) was recorded from T6, while the highest number of thrips infestation per 10 flower (6.32) was recorded from T7 (control) treatment. The highest yield per hectare (1.53 ton) in T6 and highest benefit cost ratio (12.81) was found in T3 treatment, while the lowest yield per hectare (1.27 ton) in T7 (Control) and lowest benefit cost ratio (4.16) in T5 treatment. Admire 200SL (Imidacloprid) was the best effective among the management practices for controlling whitefly and thrips of mungbean which was followed by Voliam Flexi (Thiamethoxam + Chlorantraniliprole).