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The effects of artificial selection for reduced flight ability on the survival rate and fecundity of the ladybird beetle Harmonia axyridis were assessed. The hatching rate, emergence rate and fecundity of the flightless strain were significantly lower than the control in the 36th generation after artificial selection was started under laboratory conditions. In greenhouses containing cultivated eggplant in which the flightless strain was released, the incidence of fourth instar larvae, i.e., offspring of released adults, was delayed for 7 days compared with the control and commercial strain. These results suggest that artificial selection for reduced flight ability reduces the survival and reproductive characteristics of H. axyridis.

Effects of artificial selection for reduced flight ability on survival rate and fecundity of Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae)