MANAGEMENT OF MUNGBEAN THRIPS (MEGALUROTHRIPS DISTALIS) USING CHEMICAL INSECTICIDES AND NEEM OIL

Abstract

The experiment was conducted at the research field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during the period from March to May, 2014 to manage thrips of mungbean and observe the impact of different chemical insecticides and neem oil on thrips infested mungbean field. The mungbean variety, BARI mung 6 was grown in the field and ten treatments viz., Decis 5EC, Ripcord 10EC, Marshal 20EC, Sevin 85SP, Dursban 20EC, Neem oil, Talstar 2WP, Actara 25WG, Confidor 70WG and an untreated control were set in randomized complete block design (RCBD) with three replications. Insecticides and Neem oil were applied at 7 days interval. The lowest population of thrips (1.25 plant-1) was found in Talstar 2WP treated plot which showed maximum percent reduction of thrips. Talstar 2WP also produced the maximum number of flower (16.67 plant-1), number of pod (34.27 plot-1), number of seed plants-5 (885.3), seed weight (36.19 g) and gave the highest yield (2.05 kg/plot) of mungbean. Confidor 70WG also showed a better result considering all the above parameters. Neem oil showed poor effectiveness in managing thrips. The results of present study indicate that the Talstar 2WP was the most effective insecticide against Thrips infestation on mungbean.