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The following 3 entries include the term citrus aphid.
black citrus aphid
noun: a black aphid (Toxoptera aurantii) widely distributed in warm regions that feeds on a number of cultivated plants and is considered to be a vector of tristeza disease of citrus in Brazil
brown citrus aphid
noun: a brownish aphid (Toxoptera citricida) present in many citrus-growing areas and believed to transmit the tristeza disease of citrus trees
green citrus aphid
noun: a small green aphid (Aphis spiraecola) especially abundant on citrus where it causes distorting and rosetting of the leaves
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Merriam-Webster unabridged
