Radish seed-Aphid

Includes:

Cabbage aphid (Brevicoryne brassicae)
Green peach aphid (Myzus persicae)
Turnip aphid (Hydaphis pseudobrassicae)

Pest description and crop damage Cabbage and turnip aphids species are gray and adults are covered with a bluish-white waxy powder. They form colonies on foliage, on or in buds, or in flowers. High populations reduce seed set, cause seed pods to abort, cause premature plant death, and interfere with harvest operations.

Management-chemical control

  • acephate (Orthene 97) at 1 lb/a (1 lb ai/a). REI 24 hr. Allow a minimum of 7 days between applications. Do not exceed 2 lb/a (2 lb ai/a) per year. Do not apply through any type of irrigation system. This product is highly toxic to bees exposed to direct treatment of residues on blooming crops or weeds. Do not apply to blooming radish seed during pollination. Bee colonies used for pollination should be removed from the field being treated prior to the application. Notify beekeepers pollinating crops within .25 mile of the field to be treated at least 48 hr prior to the application. Do not use on daikon radish. No portion of treated plants can be used for food or feed. 24c SLNs: Orthene 97 WA-050015 (expires 12/31/19). Washington only.
  • pymetrozine (Fulfill) at 2.75 oz/a (1.38 oz ai/a). PHI 14 days. REI 12 hr. This insecticide works primarily by ingestion, but also has some contact activity. Aphids stop feeding shortly after exposure, but may remain on the plant foliage until they die, which is usually within 2-7 days. This product has residual activity in the plant. Do not exceed 5.5 oz/a (2.75 oz ai/a) per season. The addition of a penetrating type spray adjuvant is recommended. Do not apply through any type of irrigation system. Allow at least 7 days between applications. Fulfill is toxic to bees exposed to direct application. Application to blooming crops must be between late evening and early morning to coincide with minimal bee activity. No portion of treated plants can be used for food or feed. 24c SLNs: OR-180013 (expires 12/31/23), WA-000017 (expires 12/31/20). Oregon and Washington only.

See also: