Pest description and crop damage
Larvae are small, legless, white maggots usually less than 0.33 inch (8 mm) when full grown; their head end is pointed and the rear is blunt with a dozen short, pointed fleshy processes arranged in a circle around two brown, button-like spiracles. Cabbage maggots damage and destroy root systems, riddling roots with tunnels when infestations are heavy. Tunnels provide entryways for pathogens that can cause blackleg and bacterial soft rot.
- bifenthrin (Tailgunner, others) at 0.033 to 0.04 lb ai/a or 2.1-2.6 fl oz/a. May be applied at bloom. Do not exceed 0.08 lb ai/a or 5.12 fl oz per season. Do not apply less than 14 days apart.
- thiamethoxam (Cruiser 70WS)-Do not use a Cruiser 70WS rate that will result in more than 0.266 lb thiamethoxam per acre (120.66 grams ai/a) per season.
- 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 seven days apart.