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Eriosoma lanigerum (Woolly Aphid)

Eriosoma lanigerum (Woolly Aphid). Host plants: Malus, Crataegus, Sorbus, Pyracanthus, Cotoneaster Symptoms & Significance: Colonies of small brown aphids, covered by white waxy wool White, waxy wool on branches, trunk and exposed roots Bark pitted Honeydew/sooty moulds

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Eriosoma lanigerum (Woolly Aphid)

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  1. Eriosoma lanigerum (Woolly Aphid) • Host plants: • Malus, Crataegus, Sorbus, Pyracanthus, Cotoneaster • Symptoms & Significance: • Colonies of small brown aphids, covered by white waxy wool • White, waxy wool on branches, trunk and exposed roots • Bark pitted • Honeydew/sooty moulds • Infest stems, branches • Conspicuous late spring/early summer • Cause cankers, which crack open to infection by secondary pathogens

  2. Eriosoma lanigerum (Woolly Aphid)Life Cycle • Young aphids overwinter in bark cracks & galls • From March: feed on twigs especially in leaf axils, spurs & wounds • Summer - wingless aphids develop • Occasionally winged aphids leave but not widespread

  3. Woolly Aphid - Control • Spray ‘Malathion’/’HCH’ after flowering • Severely galled/cankered branches pruned out & burnt • Biological control by parasite, Aphelinus mali with minimal insecticide spraying if present

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