Abstract
Green peach aphid, Myzus persicae (Sulzer) (Homoptera: Aphididae), interacts with many predatory insects in potato fields during the summer. The concept of the predator complex associated with green peach aphids was applied to explain the interactions between the aphid and its predators. The predator power of the predator complex was determined by two factors: the number of predators and the relative feeding capacity. The dynamics of the green peach aphid population was expressed by the number of individuals while the predator power was used to characterize the predator complex. Cumulative degree‐days for green peach aphids were used as a time scale to analyze phenology and dynamics patterns of the aphid and its predator complex. The patterns of population changes in aphids were similar during the period of study (1993–1995) although the highest density of aphids fluctuated significantly from year to year. However, the predator power appeared more stable than the green peach aphid population over the thre...
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