Blueberry-Spotted wing drosophila (SWD)

Drosophila suzukii

For pest description, crop damage, biology, life history, sampling and cultural management

See:

Management-chemical control: HOME USE

  • acetamiprid-In field tests, this product has provided inconsistent control of SWD.
  • azadirachtin (neem oil)-This product has been shown to provide about 25% control of SWD. Some formulations are OMRI-listed for organic use.
  • pyrethrins-These products provide about 80% control of SWD but have no residual activity.
  • spinosad-This product generally provides 90-100% control and 5-7 days residual activity. Some formulations are OMRI-listed for organic use.
  • zeta-cypermethrin-Toxic to bees; do not apply while bees are foraging.

Management-chemical control: COMMERCIAL USE

Laboratory tests and field experiments indicate that many of the pesticides registered for use in blueberries are effective in controlling the adult SWD. Although SWD may not be listed on a label, it is legal to use for SWD management. The products listed below target the adult stage of SWD.

  • azadirachtin (Neemix and other brands)-Consult label for rate. PHI 0 days. Achieves only about 25% control of SWD. Some formulations are OMRI-listed for organic use.
  • bifenthrin (Brigade and other brands) at 0.1 lb ai/a. PHI 1 day. Toxic to bees and should not be used when bees are foraging. Toxic to fish and other aquatic invertebrates. Synthetic pyrethroids achieved 100% mortality of SWD and provide about 10 to 14 days residual control in the field.
  • carbaryl (Sevin and other brands) at 1.5 lb ai/a. PHI 7 days. Use postbloom only. Latex-based formulations such as Sevin XLR Plus are less hazardous to bees. May provide 100% control of SWD. Toxic to bees; do not apply when bees are foraging. Toxic to aquatic invertebrates. Carbamate insecticide.
  • cyantraniliprole (Exirel) at 0.088 to 0.133 lb ai/a. PHI 3 days. Do not apply when bees are foraging. Note "Bee Advisory Box" and restrictions on the label. Provides from 75-100% control, and 7 to 10 days residual control in the field.
  • diazinon (several brands) at 0.5 lb ai/a. PHI 7 days. One application per season allowed; as such, consider other pests that may need to be managed with diazinon. Toxic to bees and most aquatic invertebrates, and carries the risk of mammalian toxicity. Do not apply when bees are foraging. May achieve 100% mortality of SWD and provide about 7 to 10 days residual control in the field. Organophosphate insecticide.
  • esfenvalerate (Asana XL) at 0.05 lb ai/a. PHI 14 days. Toxic to fish and other aquatic invertebrates. Esfenvalerate can also act like a bee repellent; do not apply within 7 days of pollination. Synthetic pyrethroids achieved 100% mortality of SWD and provide about 10 to 14 days residual control in the field.
  • fenpropathrin (Danitol) at 0.2 to 0.3 lb ai/a. PHI 3 days. Do not exceed two applications per season. Toxic to bees and should not be used when bees are foraging. Toxic to fish and other aquatic invertebrates. Synthetic pyrethroids achieved 100% mortality of SWD and provide about 10 to 14 days residual control in the field.
  • horticultural oil (several brands)-Consult label for rate. Provides some control of SWD but has no residual activity. May cause spotting on fruit. Some formulations are OMRI-listed for organic use.
  • malathion (several brands) at 1.25 lb ai/a. PHI 1 day. Toxic to bees and most aquatic invertebrates, and carry the risk of mammalian toxicity. Do not apply when bees are foraging. May achieve 100% mortality of SWD and provide about 7 to 10 days residual control in the field. Of the organophosphates tested, malathion had the longest residual activity (10 days). For SWD control, SLNs OR-130013 and WA-130010 for Malathion 8 Aquamul, and OR-130010 and WA-130004 for Malathion 8 Flowable; allow up to 2.5 lb ai/a, with a maximum of two applications, per season. The Washington SLN labels have a 2-day PHI restriction.
  • methomyl (Lannate) at 0.9 lb ai/a. PHI 3 days. Do not use during bloom.
  • phosmet (Imidan 70W) at 0.93 lb ai/a. PHI 3 days. Toxic to bees and most aquatic invertebrates, and carries the risk of mammalian toxicity. Do not apply when bees are foraging. May achieve 100% mortality of SWD and provide about 7 to 10 days residual control in the field. Organophosphate insecticide.
  • pyrethrin (several)-Consult label for rate and use directions. Toxic to bees; do not apply when bees are foraging. Highly toxic to fish. Provides about 80% control of SWD but has no residual activity. Some formulations are OMRI-listed for organic use.
  • spinetoram (Delegate WG) at 0.09 lb ai/a. SLN 24c OR-170016 for Delegate allows a 1-day PHI in Oregon only; read label carefully for restrictions on number of applications allowed. PHI 3 days. Toxic to bees for three hours following treatment. Do not apply when bees are foraging. May achieve 100% mortality of SWD and provide about 5 to 7 days residual control in the field. Spinosyn insecticide.
  • spinosad (Success or Entrust) at 0.062 to 0.09 lb ai/a. PHI 3 days. SLN 24c OR-160013 and WA-140014 for Entrust SC formulation allow a 1-day PHI in Washington and Oregon only. Entrust is OMRI-listed for organic use. Toxic to bees for three hours following treatment. Do not apply when bees are foraging. May achieve 100% mortality of SWD and provide about 5 to 7 days residual control in the field. The bait formulation of spinosad (GF-120) is not effective against SWD. Spinosyn insecticide.
  • zeta-cypermethrin (Mustang) at 0.05 lb ai/a. PHI 1 day. Toxic to bees and should not be used when bees are foraging. Toxic to fish and other aquatic invertebrates. Synthetic pyrethroids achieved 100% mortality of SWD and provide about 10 to 14 days residual control in the field.