This ichneumon wasp is a natural enemy of 18 species of leafminer, especially in greenhouses and warmer climates. It attacks its host in the tunnel and lays one or more eggs on or near it. The egg develops in the tunnel and turns into a new wasp which uses the dead larva as food. A biological program should also include trapping and use of IGR sprays or horticultural oils.

Care and Distribution: One parasite for every 10 new mines per developed plant per week should begin during the first 6 weeks of an infestation, or 500 to 1,000 per acre. Monitoring of leaves for emerging parasites will show if parasitism is high enough (at least 90 %) to suppress leafminers.