Cabbage and mustard seed-Cabbage maggot

Delia brassicae

Pest description and crop damage White maggots that feed on roots and underground stems and weaken, lodge, and kill plants. Adult is a small gray fly that lays white, oblong eggs at plant bases.

Management-chemical control

  • azadirachtin (Neemix 4.5) at 0.02 to 0.04 lb ai/a. PHI 0 days. Begin applications at first sign of infestation. Multiple applications and thorough coverage are necessary for effective control. This botanical pesticide acts slowly. Spray early, well before harvest, and check for effect. Some formulations are OMRI-listed for organic use.

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