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Articles by Jesmun Nahar
Total Records ( 2 ) for Jesmun Nahar
  M. Khalequzzaman and Jesmun Nahar
  Nine insecticides were used in a toxicity test on adult red flour beetle, Tribolium castaneum (Herbst). Mortality tests were done by applying different doses of insecticide following residual-film method in a petridish on laboratory reared 3 to 7 days adults and the data was recorded after 24 hours of treatment. The calculated LD50 values were 13.8221, 53.8803, 8.0592, 424.1043, 223.2351, 8.1755, 920.1590, 243.3920 and 0.2416 μg/cm2 for chlorpyrifos, fenitrothion, malathion, monocrotophos, phosphamidon, carbosulfan, propoxur, cypermethrin and lambda-cyhalothrin respectively. The results indicate that lambda-cyhalothrin was the most toxic and propoxur was least toxic to adult red flour beetles when applied singly. The order of toxicity of the insecticides was lambda-cyhalothrin > malathion > carbosulfan > chlorpyrifos >fenitrothion > phosphamidon> cypermethrin> monocrotophos > propoxur. Lambda-cyhalothrin, malathion, carbosulfan and chlorpyrifos can be used to control red flour beetle in storage and other insecticides can control them moderately.
  M. Khalequzzaman , Hosne Ara , Fatema Zohura and Jesmun Nahar
  The LD50 of malathion, diazinon, dichlorvos, phosphamidon, lambda-cyhalothrin, cypermethrin, carbosulfan and propoxur on adult housefly were 2.9852, 0.1696, 0.2769, 0.3346, 0.0155, 0.0060, 0.0329 and 0.0137 µg/fly respectively. Dichlorvos, diazinon and cypermethrin showed the highest repellency and phosphamidon, malathion and propoxur showed the highest attractancy to both male and female houseflies. Propoxur and carbosulfan showed lower repellency. Lower doses always showed lower repellency and higher attractancy in all tested insecticides.
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