Abstract
Developmental rates of the aphid Aphis pomi and its parasitoid Aphidius ervi were compared at four constant temperatures (15, 20, 25, 30°C). Aphis pomi required 159.07 degree-days (DD) above lover developmental threshold (LDT) of 0.3°C. Aphidius ervi required 229.73 DD above LDT of 5.98°C. Developmental rate of A. pomi is higher than the developmental rate of A. ervi at the same conditions
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