S. AHMMED1*, M. N. ISLAM2, M. S. POLAN3, M. S. RAHMAN1 and M. T. RAHMAN1
1Scientific Officer, 2Principal Scientific Officer and 3Senior Scientific Officer, Bangladesh Jute Research Institute, Manik Mia Avenue, Dhaka-1207, Bangladesh. *Corresponding author’s Email: sohanbau2010@gmail.com
ABSTRACT
The experiment was carried out at Net House of Bangladesh Jute Research Institute (BJRI), Dhaka, Bangladesh for the selection of dosages and in the field of two different locations viz. Jute Agriculture Experimental Station (JAES), Manikganj and Jute Research Sub-Station, Tarabo, Narayanganj for evaluation of nine insecticides against jute hairy caterpillar during the jute growing season (April-August) 2014 following Randomized Complete Block Design (RCBD) with three replications. Lasar 10WDG (Emamectin Benzoate 10% WDG), Over 40% WDG (Emamectin Benzoate + Thiomethoxam), Comon 6% WDG (Abamectin 2% + Emamectin Benzoate 4% WDG), Fusion 20SL (Imidacloprid 20SL), Amber 40WDG (Lufenuron 10% + Thiomethoxam 30%), Aktic 24 SC (Spirotetramate 24% SL), Pilarmit 10 SL (Nitenpyrum 10 SL), Lama 24 SC (Thiacloprid 24% SC), Thipro 18% SC (Thiamethoxam 12% + Fipronil 6%) @ 750 gm/ha, 750 gm/ha, 250 gm/ha, 500 ml/ha, 75 gm/ha, 750 ml/ha, 300 ml/ha, 120 ml/ha, 100 ml/ha respectively were found effective and economic in the pot experiment for controlling jute hairy caterpillar at 5th day after spray. Among these insecticides, the highest percent reduction of jute hairy caterpillar (93.34) as well as more yield (3.08 ton/ha) over control was found in Over 40% WDG followed by Lama 24SC, Thipro 18% SC at 7th days after spray at both tested places. Overall, All tested insecticides were found effective significantly giving more than 83% reduction of infestation and more than 2.69 ton/ha fibre yields at both field experiments.
Keywords: Insecticides, Jute hairy caterpillar, Effectiveness, Jute and Yield.