Abstract
Population of the foxglove aphid, Aulacorthum solani on green peppers and eggplants after releasing an aphid parasitoid, Aphidius gifuensis was investigated in greenhouses. The numbers of the foxglove aphids rapidly decreased and those of less than 20% remained on the original plants 5 days after releasing parasitoids. Eleven percentages of the aphids moved to the other plants infested with no aphids before the parasitoid introduction. The aphids in another greenhouse with no parasitoids did not decreased rapidly. These results suggest that introduction of A. gifuensis can lead to quick suppression of the foxglove aphids.
