EFFECTIVENESS OF SOME INSECTICIDES IN CONTROLLING MAJOR INSECT PESTS OF POTATO

Abstract

The experiment was conducted at the research field of Sher-e-Bangla Agricultural University, Dhaka; during the period from November, 2014 to March 2015 to study the effect of different insecticides on controlling the major insect pests of potato. The potato variety cardinal was used as the test crop. The experiment was laid out in Randomized Complete Block Design (RCBD) with four replications. The experiment consists of seven treatments viz. T1 (Admire 200 SL @ 0.5ml/L of water); T2 ( Diazinon10G with Emamectin Benzoate @ 0.5 g/L); T3 (Ascend 3G with cartap @ 1g/L); T4 (Acetamiprid 0.5g/L); T5 (Furadan 5G with Actara @ 0.5g/L); T6 (Chlorpyriphos @ 2ml/L+Cypermethrin @ 1.0ml/L) and T7 (untreated control). The experiment revealed that T4 treatment showed the best performance to control aphid infestation (92.51%) and lowest infestation reduction was observed on T1 treatment (73.69%). In case of jassid infestation 94.83% significant highest infestation reduction was observed on T4 treatment and lowest on T1 and T3 treatment (87.09%). In controlling cutworm, T2 treatment showed best performance (82.22%) followed by T1 (77.78%) and the lowest in T5 (46.77% reduction). Highest yield (30t/ha) was observed on T2 treatment.