Cabbage aphid (Brevicoryne brassicae)
Pest description and crop damage Cabbage aphids are green gray with a white, waxy coating. They commonly occur in dense colonies, often covered with waxy droplets. They have piercing-sucking mouthparts and prefer to feed on the newest plant growth. Large colonies can stunt or kill small plants. The cabbage aphid appears much earlier than the turnip aphid.
- azadirachtin (Ecozin Plus) at 0.10 lb ai/gal. Spray 15 to 30 oz when pests first appear. Spray immediately after the first winged alates or clones are observed on plants. Repeat application every 7 to 10 days. Use in combination with 0.25 to 1.0% non-phytotoxic crop oil in sufficient water to cover undersides of leaves. This product can be used at half rate, but not less than 4 oz per acre per application if mixed with other insecticides. Do not exceed 56.4 oz per acre per application. Some formulations are OMRI-listed for organic use.
- Beauveria bassiana GHA (Mycotrol O) at 0.25 to 1 quart/100 gal when pests first appear. REI 4 hr. Mycotrol O is most effective when used early, before high insect populations develop. Reapply as necessary under a pest management program that includes close scouting. Apply in sufficient water to thoroughly cover foliage infested with insects, typically 5 to 100 gal of water per acre. REI 4 hr. Mycotrol ESO contains live spores of the naturally occurring fungus, Beauveria bassiana Strain GHA. Spores are alive and may be harmed by storage at high temperatures or contact with water for more than 24 hours. OMRI-listed for organic use.
- bifenthrin (Bifen 2 AG Gold, others) at 0.033 to 0.04 lb ai/a or 2.1 to 2.6 fl oz/a. Do not exceed 0.08 lb ai/a or 5.12 fl oz per acre per season. Do not apply less than 14 days apart.
- chlorantraniliprole (Besiege, others) at 10.0 fl oz/a. Do not exceed a total of 28.0 fl oz of Besiege or 0.09 lb ai of lambda-cyhalothrin-containing products or 0.2 lb ai of chlorantraniliprole-containing products per acre per year. PHI 21 days. Minimum interval between applications is 5 days. If adjuvants are used, use only a non-ionic surfactant (NIS).
- chlorpyrifos (Whirlwind, others) at 1 to 2 pts/a. PHI 21 days. Do not make more than three applications of any product containing chlorpyrifos per crop. Do not make a second application of Whirlwind or other products containing chlorpyrifos within 10 days of the first application.
- cyhalothrin-gamma (Declare) at 0.015 lb ai/a. PHI 7 days. Do not apply more than 0.045 lb ai per acre per season.
- flonicamid (Beleaf 50 SG) at 0.089 lb ai/a. Do not apply more than 2.8 oz per acre per application or 8.4 oz/a per acre per year. Do not apply more than 3 applications per year. Allow a minimum of 7 days between applications.
- lambda-cyhalothrin (Warrior II with Zeon Technology) at 0.03 lb ai/a. Do not apply more than 0.09 lb ai/a per season. Do not apply within 7 days of harvest.
- sulfoxaflor (Transform WG) at 0.016 to 0.023 lb ai/a. Do not make applications less than 14 days apart. Do not exceed more than two applications per season. Do not apply this product until after petal fall.
- zeta-cypermethrin (Mustang Maxx) at 4.0 fl oz/a (0.025 lb ai/a). PHI 7 days. Do not apply more than 24 fl oz of product (0.15 lb ai) per acre per season. Do not make applications less than 7 days apart.
Management-chemical control (Seed Treatment)
- imidacloprid (Gaucho 600) at 10.24 to 25.6 fl oz per hundredweight of seed. In areas where foliar insects are in high numbers, the higher application rate is recommended. Do not graze for feed.
- thiamethoxam, difenoconazole, mefenoxam, fludioxonil and sedaxane (Helix Vibrance)-Apply at 23.0 fl oz per 100 lb of seed.