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Pakistan Journal of Biological Sciences
Year: 2004  |  Volume: 7  |  Issue: 2  |  Page No.: 287 - 291

Methods of Pest Control and Direct Yield Loss Assessment of Country Bean (Dolichos lablab) at Farmer’s Field Condition: A Survey Finding

K.U. Ahmed, M.M. Rahman, M.Z. Alam and S.U. Ahmed    

Abstract: A survey on farmer’s pest control methods and direct yield loss assessment of country bean (Dolichos lablab) was done during September 2000 to February 2001 in North Edilpur and South Mohadebpur villages of Sitakundu under Chittagong district. Results revealed that farmers used Fanfan, Nogos, Ripcord, Malathion, Roxion and Sumithion as chemical methods and applying ash and handpicking of insect pests as non-chemical method to control insect pests. The frequency of insecticide application during flowering stage to harvest was 9 to 15 with waiting period of only 3 to 20 days and 6 to 12 with waiting period of 3 to 25 days in North Edilpur and South Mohadebpur, respectively. The pod infestation by pod borer and aphids varied from 2.29 to 5.12% and from 2.83 to7.16% in North Edilpur and South Mohadebpur, respectively. Insect pests thus caused direct yield loss of 60.38-200.69 kg ha-1 in North Edilpur and 92.63-345.80 kg ha-1 in South Mohadebpur.

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