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KAC Citrus Entomology
University of California
KAC Citrus Entomology

Bean thrips

Bean thrips adult
Bean thrips adult
Bean thrips burrow into orange navels and overwinter
Bean thrips burrow into orange navels and overwinter

Basic Information

Life cycle: Bean thrips, Caliothrips fasciatus, lays its eggs in and completes its lifecycle in weeds and other plants near citrus orchards.  The adult bean thrips migrates into citrus orchards in October-November, when the weed hosts die or the field crops it infests are harvested. Bean thrips seek out well-protected areas in which to overwinter such as the navel of oranges, where they contaminate harvested fruit.

Damage: Bean thrips is not considered a pest of citrus in California.  However, other countries that do not have this pest consider it a quarantine pest of significance, requiring a preclearance program and fumigation of infested loads.   

Distribution: Found throughout California citrus.

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