Aphidius is a small parasitic wasp that preys primarily upon the green peach aphid and as many as 40 other related species. This native North American parasite occurs naturally outdoors and frequently parasitizes aphids in green houses. Aphidius is not a good parasite of cotton aphid or potato aphid.
Aphidius is very good at locating new aphid colonies when aphid populations are low, but should be used in combination with other beneficials when aphid infestations are high.
Up to 300 aphids are attacked by each female. At 70 degrees F, Aphidius takes two weeks to develop from egg to adult. At 77 degrees F, 10 days from egg to adult. There are usually twice as many females produced as males.
This parasite can be used year-round in greenhouses and outdoors as it is not affected by short-day lengths.
Release rates: 500-3,000/acre, 2-3 times, one week apart, depending on the extent of infestation.