Abstract: Under laboratory conditions, a preliminary study of Harmonia axyridis Pallas of the male and female adult Megoura japonica Matsumura feeding effect was researched, using the Holling-Ⅱ equation function response model of Harmonia axyridis of male and female adults feed on Megoura japonica Matsumura fitting. The results show that the Harmonia axyridis Pallas are accord with the function of the male and female adult reaction Holling-Ⅱmodel. However, in a certain space and at the same proportion of prey, the intra-species interference would have an impact on the prey of adult ladybirds of Harmonia axyridis Pallas preying on the Megoura japonica Matsumura. In this experiment, the interference coefficient was 1.09.

Key words: Harmonia axyridis Pallas, Megoura japonica Matsumura, predation, intraspecific interference