Woolly Apple Aphid: Root and Bark Feeder Requiring Dual Treatment

Swollen, disfigured lower trunk and knotted roots indicate woolly apple aphid—unlike most aphids, this species feeds on bark and roots, not leaves. Control requires persistent horticultural oil sprays in spring when nymphs are active, plus an annual imidacloprid soil drench as label permits. This dual approach targets both above- and below-ground populations.