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.