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.