The parasitic wasp Aphidius colemani is very efficient for the biological control of small-sized aphids, especially the cotton aphid and the green peach aphid. It parasitizes adults and nymphs. Parasitism is easy to recognize by the golden-brown colored mummies. A single female can lay hundreds of eggs during the first 4 days of her adult life. A. colemani has good searching ability and is able to find aphid colonies from a long distance by detecting "alarm signals" produced by an infected plant or the smell of honeydew secreted by its hosts. The presence of a parasitic wasp can cause panic in an aphid colony, aphids often let themselves fall to the ground where they usually die.
Aphidius colemani is applicable on all greenhouse crops on which suitable hosts occur.