MANAGEMENT OF SUCKING INSECT PESTSON MUNGBEAN AND ITS IMPACT ON THE INCIDENCE OF MOSAIC DISEASE

Abstract

The experiment was conducted at the research field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during the period from April to November, 2011 to manage the sucking insects of mungbean and observe its impact on incidence of mosaic disease. The mungbean variety, BARI mung 4 was grown in the field and seven treatments viz., Ripcord 10EC, Actara 25WG, Marshal 20EC, Malathion 57EC, Neem oil, Tamarind Fruit extract and an untreated control were set in randomized complete block design (RCBD) with four replications. Insecticides, Neem oil and Tamarind Fruit extract were applied at 7 days interval. Whitefly, jassid, aphid and white leaf hooper were found as sucking insects and whitefly was the most abundant in mungbean field. The lowest population of aphid, jassid, whitefly and white leafhopper (6.65, 3.05, 6.58 and 6.58 plant-1 respectively) was found in Marshal 20EC treated plot which showed maximum percent reduction of sucking insects. The percent mosaic infested plant was found lowest in the same treatment. Marshal also produced the maximum plant height (90.25 cm), number of seeds pod-1 (8.25), 1000-seed weight (35.50 g) and gave highest yield (566.50 g plot-1) of mungbean. Neem oil showed the intermediate results considering all the parameters. The results of present study indicate that the Marshal 20EC was the most effective treatment against sucking insects and mosaic infection of mungbean.