Cabbage and mustard seed-Diamondback moth

Plutella xylostella

Pest description and crop damage Small, pale yellowish green larvae with erect black hairs that eat holes in foliage. Adults are small gray or brown moths with white marks on forewings which form a diamond when wings are folded.

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 1.53 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. PHI 1 day. REI 24 hr. Apply as required by scouting, usually at intervals of 5 days or more.

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