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2008年45 No.2
The parasitic effect of Melittobia acasta on Musca domestica
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Key Words:Melittobia acasta,Musca domestica,parasitism rate
Abstract:Melittobia acasta Walker is a parasitoid of Musca domestica. The effect of food on longevity of M. acasta, and the effect of the age of the parasitoid and pupae, the densities of the parasitoid and fly's pupae on parasitism rate were studied. The results showed that M. acasta fed with 15% glucose solution had the longest longevity. An individual of M. acasta could lay eggs in up to eight fly pupae of M. domestica, and could reproduce 58 progenies. Up to 22 progenies would be reproduced in one pupa. The parasitic rate decreased with the increment of the age of M. acasta and M. domestica pupae. The relationship between the parasitic rate (Y) and the age of the parasitoid(X) was y=3.36-0.062x-0.045x2, and the relationship between the parasitic rate (Y) and the age of the pupa(X) was y=2.50+0.91x-0.34x2 The relationship between the density of M. domestica and the parasitic rate could be described by Holling Model Na=0.6165TrN0(1+0.6165×0.499 N0), and the relationship between the density of M. acasta and the parasitic rate was a=0.4943p-0.306.