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negro bug

noun, sometimes capitalized N

Definition of negro bug

: any of numerous minute convex black bugs that constitute the genus Corimelaena and that feed on plant juices and impart a foul taste to fruits (as raspberries) over which they crawl especially : a common pest (C. pulicaria) of the U.S. east of the Rocky mountains that is sometimes very destructive to celery, corn, and wheat

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