Cane fruit-Thrips

Frankliniella spp.

Pest description and crop damage Adult thrips are small (about 1-2 mm long at maturity), slender insects with fringed wings. They are generally white when young but brown or black when mature. Larvae are very tiny and difficult to distinguish without magnification. They feed by puncturing plant material, often blossoms, and sucking out the cell contents. Injured blossoms often turn into distorted fruit. When feeding on flowers, affected petals appear stippled or are scarred with brown streaks or spots. When unusually abundant in spring, thrips have been reported to cause blossom blasting. Fruit may be misshapen or distorted. Controls are most effective when applied at flowering; field control is not practical in eliminating thrips present at harvest.

Management-chemical control: HOME USE

  • acetamiprid
  • azadirachtin (neem oil)-Some formulations are OMRI-listed for organic use.
  • bifenthrin
  • carbaryl
  • imidacloprid
  • insecticidal soap-Some formulations are OMRI-listed for organic use.
  • malathion
  • permethrin (for use on raspberries only)
  • pyrethrins-Some formulations are OMRI-listed for organic use.
  • spinosad-Some formulations are OMRI-listed for organic use.
  • zeta-cypermethrin

Management-chemical control: COMMERCIAL USE

  • acetamiprid (Assail) at 0.085 to 0.1 lb ai/a. PHI 1 day. Do not exceed 0.5 lb ai/a per season.
  • diazinon (several brands) at 1 lb ai/a. PHI 7 days. Use prebloom to prevent bee kill. One application per season allowed; as such, consider other pests that may need to be managed with diazinon. Restricted use pesticide.
  • imidacloprid (Admire) at 0.25 to 0.5 lb ai/a. PHI 7 days. Soil applied. Admire and Provado have the same active ingredient; for resistance management, do not follow one with the other. Note "Bee Advisory Box" and restrictions on the label.
  • imidacloprid (Provado 1.6F or Admire Pro) at 0.16 lb ai/a. PHI 3 days. Foliar applied. Provado and Admire have the same active ingredient; for resistance management, do not follow one with the other. Do not apply during bloom or when bees are actively foraging. Note "Bee Advisory Box" and restrictions on the label.
  • spinetoram (Delegate WG) at 0.05 to 0.09 lb ai/a. PHI 1 day. Toxic to bees for three hours following treatment. Do not apply when bees are foraging. Suppression only.
  • spinosad (Success or Entrust) at 0.062 to 0.1 lb ai/a. PHI 1 day. Toxic to bees for three hours following treatment. Do not apply when bees are foraging. Entrust is OMRI-listed for organic use.