Includes
Cabbage aphid (Brevicoryne brassicae)
Green peach aphid (Myzus persicae)
Turnip aphid (Lipaphis erysimis)
Pest description and crop damage Both species are gray, mealy plant lice that form colonies on foliage, on heads, or in buds.
Management-chemical control
- azadirachtin (Neemix 4.5) at 10 to 16 fl oz/a (0.031 to 0.049 lb ai/a). PHI 0 days. REI 4 hr. Begin applications at first sign of infestation. Multiple applications and thorough coverage are necessary for effective control. Apply every 7 to 10 days as needed. This botanical pesticide acts slowly. Spray early, well before harvest, and check for effect. Some formulations are OMRI-listed for organic use.
- gamma cyhalothrin (Declare) at 1.02 to 1.54 fl oz/a (0.01 to 0.015 lb ai/a). Do not apply more than 12.3 fl oz/a (0.12 lb ai/a) per season. Suppression only. PHI 1 day. REI 24 hr. Apply as required by scouting, usually at intervals of 5 days or more.
- pymetrozine (Fulfill) at 2.75 oz/a (0.086 lb ai/a) when aphids first appear. Do not apply more than 5.5 oz/a (0.172 lb ai/a) per crop per year. Allow a minimum of 7 days between applications. PHI 14 days. REI 12 hr. Pollinator protection: when crops or weeds are in bloom, apply between 6 pm and 7 pm, Washington only. SLN WA-190003 for Adama Fulfill products (expires 12/31/2024).
See also: