An aphid is a bug that's considered a pest by many gardeners. Aphids like to eat a variety of plants, including roses, lettuce, peaches, and grapes.

Aphids feed by sucking sap or liquid from a plant, and they can be quite destructive to a farmer's crop or a gardener's flower bed, because they reproduce quickly and efficiently. Several kinds of birds and spiders prey on aphids, and farmers use both chemical and biological insecticides to control them. The word aphid comes from the Modern Latin aphis, from 1758, although its origin isn't known.

Definitions of aphid
  1. noun
    any of various small plant-sucking insects
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    Aphis pomi, apple aphid, green apple aphid
    bright green aphid; feeds on and causes curling of apple leaves
    Aphis fabae, bean aphid, blackfly
    blackish aphid that infests e.g. beans and sugar beets
    greenish aphid; pest on garden and crop plants
    ant cow
    excretes a honeylike substance eaten by ants
    woolly aphid, woolly plant louse
    secretes a waxy substance like a mass of fine curly white cotton or woolly threads
    green peach aphid
    yellowish green aphid that is especially destructive to peaches
    pale chrysanthemum aphid
    important pest of chrysanthemums
    American blight, Eriosoma lanigerum, woolly apple aphid
    primarily a bark feeder on aerial parts and roots of apple and other trees
    Prociphilus tessellatus, woolly alder aphid
    attacks alders
    type of:
    louse, plant louse
    any of several small insects especially aphids that feed by sucking the juices from plants
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