Aphidius colemani
spins a cocoon inside the aphid cuticle, causing it to swell. The cuticle turns from a hard, leathery brown to a golden yellow casing, known as a mummy [...] however, provide a reliable key to the species of wasp within: many braconid wasps that parasitize aphids produce a mummy similar to that of Aphidius spp. [...] Consult a Koppert advisor or a recognised distributor of Koppert products for advice on the best strategy for your situation. Best conditions for use of Aphidius