KAC Citrus Entomology
University of California
KAC Citrus Entomology

Monitoring

To determine if your orchard has bean thrips

  • Select fruit from the outside of the block facing likely sources of bean thrips fly-ins (creek bed, weeds, nut crops, or other crops likely to harbor bean thrips in late summer). 
  • Select fruit with a small exterior navel opening
  • Take thin slices across the navel and inspect for thrips using a head or hand lens.
  • Some bean thrips can go very deep into the navel
  • Differentiate live bean thrips from other insects or mites and from the blackened tip of a flower stigma often found in the navel. For assistance in identifying thrips species that could be infesting navels, download the pdf: Recognizing Bean Thrips and Other Thrips Inhabiting Citrus.

See the Citrus Pest Management Guidelines for information on bean thrips control.

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