Use pattern of insecticides in country bean (dolichos lablab l.)

Abstract

Abstract : A survey was conducted in intensive country bean growing areas of Jessore on the use pattern of insecticides by farmers growing country bean. One hundred farmers were interviewed using objective oriented questionnaires concerning the type of insecticides used, their frequency and interval of application, time of application prior to harvest, major pests observed in the fields and the safety measures followed by the farmers while applying insecticides. About 100 per cent farmers of twelve selected locations considered pod borer and aphid as major pests. Mite was recorded as the second most important pest of country bean by 40.00 to 87.50 per cent farmers. The most commonly used insecticides in country bean were Carbaryl (Sevin 85SP), Carbosulfan (Marshal 20EC), Carbofiiran (Furadan 5G), Cartap (Suntap 50SP), Malathion (Diethion 57EC, Hilthion 57EC), Quinalphos (Korolux 25EC), Chloropyrifos (Dursban 20EC), Sulphur (Thiovit 80WG), Imidachloprid (Admire), Mancozeb (Dithane 45M), Diazinon, Abamectin Benzoate (Proclem 5SG), Arostar, Fenvalerate, Fipronil (Regent 50SC), Thiomethoxam (Actara 25WG), Cypermethrin (Cymbush 10EC, Ripcord 10EC, Fenom 10EC, Ostaad 10EC, Peskil 10EC, Basathrin 10EC) etc. As a common practice, the country bean growers used different combinations of insecticides instead of single insecticide. All of the insecticides used in different combinations were non-selective and highly toxic to both pests and natural enemies. In all selected locations, 10.00 to 50.00 per cent farmers applied different insecticides every day and in some cases even twice in a day on country bean. On an average, 35.63 per cent fanners in the study areas applied insecticides at a frequency range of 61-90.