Abstract
Abstract This experiment was conducted at the central farm of Sher-e-Bangla Agricultural University, [23.740 N latitude and 90.350 E longitude] Sher-e-Bangla Nagar, Dhaka, Bangladesh, during the period of March to May, 2014 to study the Whitefly and Thrips pest incidence in mungbean and their management practices BARI Mung-5 was used as the test crop for 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 5 SG (Emamectin Benzoate) @ 2gm/L; T3: Voliam Flexi (Thiamethoxam+Chlorantraniliprole) @ 0.25 ml/L; T4: Tapnor 40 EC (Dimethoate) @ 2.0 ml/L; T5: Allion 2.5 EC (Lamda-Cyhalothrin) @; T6: Admire 200SL (Imidachorpid) @ 0.25 ml/Land T7: Control. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The lowest number of whitefly infestation per plant in the vegetative stage (4.18) and reproductive stage (2.13) was recorded from T6 treatment, whereas the highest (14.44) and (8.10) was recorded from T7 treatment in respective stage. Thrips infestation was higher (6.32) per 5 flower was recorded from T7 treatment whereas lower infestation (1.88) per 10 flower was recorded from T6. The lowest yield per hectare (1.27 ton) was found in T7 and lowest benefit cost ratio (4.16) was found in T5 whereas highest yield per hectare (1.53 ton) was found in T6 and highest benefit cost ratio (12.81) was found in T3 treatment. Among the management practices for controlling whitefly and thrips of mungbean Admire 200SL @ 0.25 ml/L of water was more effective which was followed by Voliam Flexi (Thiamethoxam+Chlorantraniliprole) @ 0.25 ml/L of water Farmers should use Admire 200SL(Imidachorpid) @ 0.25 ml/L of water at 10 days interval for controlling whitefly and thrips in mungbean.
Highlights
Variety and treatments Mungbean variety BARI Mung-5 was used as experimental materials for the study and the seed of the variety of this experiment collected from Bangladesh Agricultural Research Institute (BARI)., Joydebpur, Gazipur
The data shows that the lowest number of whitefly (4.18/plant at vegetative and 2.13/plant at reproductive stage) was observed in T6 (Admire 200SL) treated plot followed by T3 (Voliam Flexi) treated plot (5.22/plant at vegetative and 3.90/plant at reproductive stage) having significant differences between them
Admire 200SL showed the best performance in reduction of whitefly population over control followed by Voliam Flexi
Summary
The experimental area is located at 23.740 N latitude and 90.350 E longitude with an elevation of 8.2 m from the sea level [25]. The selected plot was above flood level and sufficient sunshine having available irrigation and drainage system during the experimental period. Climate and Weather The experimental area is situated in the sub-tropical climatic zone and characterized by heavy rainfall during the months of March to May ( kharif season) and October to March (robi season) is characterized by comparatively low temperature and plenty of sunshine hour from November to February. The detailed meteorological data in respect to temperature, relative humidity and total rainfall was recorded by the weather station of Bangladesh, Sher-e-Bangla Nagar, Dhaka during the period of study which have been presented in Appendix II
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