One is Aphidius matricariae, which can parasitize about 40 aphid species including the green peach aphid.

Aphidius matricariae has been largely replaced by Aphidius colemani (Figure 11), which is effective against both the green peach aphid and cotton aphid.

On green peach aphids, these are the same colour as the body, slightly flared and darker at the tip.

Then it turned out that it is resilient to a lot of other insects too, including the green peach aphid and caterpillars of the beet armyworm.

Then it turned out that it is actually resilient to a lot of other insects too, including the green peach aphid and caterpillars of the beet armyworm.