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BEAN APHID PREDATION EFFICIENCY OF LADY BIRD BEETLE Micraspis discolor F. (COLEOPTERA: COCCINELLIDAE) (Pages : 40 - 45)

SUBRATA PAUL CHOWDHURY, M. ABDUL. AHAD, M. R. AMIN, M. R. AMIN AND NURUL AMIN RASEL

The experiment was conducted at the Department of Entomology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, during January to April 2007 at 21.02ºC ± 4.5 ºC (Room temperature) to determine the predation efficiency of M. discolor. Predation efficiency of 1st, 2nd, 3rd and 4th instar larvae of Micraspis discolor were 1.9±0.20, 3.6±0.19, 4.43±0.24 and 6.08±0.24 aphids, respectively, while the predation efficiency of male and female adults were 1003.27±104.35 and 1216.40± 22.89 aphids, respectively. The data of the aphid predation of the beetles reveal that the larvae of the 4th instar showed significantly the highest predation performances and the 1st instar showed the lowest one. The female beetles were more effective in aphid predation in compared to the male beetles.Download


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