Aphid Guard from IPM Labs
Aphid banker plants produce a constant supply of aphids, which in turn support continuous reproduction of aphid parasites and the aphid midge. Greenhouse growers benefit by having a reproducing natural enemy population in the greenhouse that can find and attack pest aphids on the crop as soon as they appear. It also reduces their costs for regular shipments of natural enemies via overnight freight. Aphid Guard consists of densely seeded young barley plants infested with the bird cherry-oat aphid, Rhopalosiphon padi. These aphids do not attack broad-leaved plants.