ECO-FRIENDLY MANA GEMENT OF PULSE BEETLE, CALLOSOBRUCHUS CHINENSIS LINN. USING BOTANICALS AND FUMIGANTS ON STORED MUNGBEAN

Abstract

The experiment was conducted in the laboratory under the Department of Entomology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from April to July, 2011 to find out the eco-friendly management of pulse beetle using some promising botanicals and fumigants on stored mungbean. The study consist two separate experiments considering botanical and fumigant. Five botanicals were used viz. dried leaf powder of neem @ 2.5 g/kg mungbean grains (T1), bishkatali @ 2.5 g/kg mungbean grains (T2), marigold @ 2.5 g/kg mungbean grains (T3), dholkolmi @ 2.5 g/kg mungbean grains(T4), chopped garlic bulb @ 1.0 g/kg mungbean grains (T5) along with control (T6). Three fumigants viz. camphor @ 1.0 g/kg mungbean grains (T1), phostoxin tablet @ 200 mg/kg mungbean grains (T2), naphthalene @ 500 mg/kg mungbean grains (T3) along with control (T4). The experiments were laid out in Completely Randomized Design with four replications. It was observed that the treatment T1 reduced the highest percent of grain infestation by number and weight (43.12% & 41.72%, respectively) over control than other botanicals while T3 showed the least performance (6.57% &2.25%, respectively). Conversely, T5 reduced the highest percent of adult emergence (43.65%) and grain content loss (49.91%) over control while T3showed the least performances (11.71%). Similarly, T5 increased the highest percent seed germination (25.65%) over control while the lowest was in T2 (6.57%). Among three fumigants, T1 reduced the percent of grain infestation by number and weight (49.65% &49.54%, respectively), adult emergence (77.66%) and grain content loss (95.18%) over control than other fumigants. Conversely, T1 increased the highest percent of seed germination (26.57%) over control than other fumigants. Irrespective of botanicals and fumigants, all fumigants especially camphor showed better performance. So, it can be concluded that camphor @ 1.0 g/kg mungbean grains was suitable for managing pulse beetle on stored mungbean.