Radish seed-Cabbage seedpod weevil

Ceutorhynchus assimilis

Pest description and crop damage Small, dark gray snout beetles that congregate on blooms. Larvae feed on seeds inside pods.

Management-chemical control

  • azadirachtin (Aza-Direct, Neemix 4.5)-See label for rates. PHI 0 days. This is a botanical insecticide with ingestion and contact action that kills larvae by interfering with molting; also reduces damage by repelling and deterring feeding. Repeat in 7- to 10- day intervals beginning at the first sign of infestation when pests are immature. Repeated applications break the life cycle of the pest. Some formulations are OMRI-listed for organic use.
  • cyantraniliprole (Exirel) at 13.5 to 20.5 fl oz/a. REI 12 hr. Make a second application if weevil adults continue to reach treatment threshold 7 to 10 days after first application. Do not apply more than 0.4 lbs ai/a. This product is toxic to aquatic invertebrates and oysters. Do not apply directly to water. Drift and runoff may be hazardous to aquatic organisms in water adjacent to use sites. The product is highly toxic to bees exposed to direct treatment on blooming crops or weeds. Do not apply this product while bees are foraging. The beekeeper providing pollination services must be notified at least 48 hr prior to application so that the bees can be removed or covered prior to spraying. No portion of treated plants can be used for food or feed. 24c SLN: OR-160011 (expires 12/31/18). Oregon only.