woolly aphid
US /ˈwʊli ˈeɪfɪd/
UK /ˈwʊli ˈeɪfɪd/
1.
a small insect of the aphid family, covered with a white, waxy, wool-like secretion, that feeds on the sap of plants, especially apple trees
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The apple tree was heavily infested with woolly aphids.
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You can identify woolly aphids by their white, fluffy appearance.