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Preventing Cabbage Worms in New Zealand: Row Covers, BT, and Companion Planting

Stop Egg‑Laying

Cover cabbage family plants with floating row covers (Reemay) immediately after planting. The lightweight fabric lets in light, water, and air but blocks moths.

Control Hatched Worms

Apply Bacillus thuringiensis (BT, sold as Dipel or MVP) – a dust toxic only to caterpillars. Safe for humans and beneficials.

Companion Planting

Plant dill near cabbage and broccoli; its scent deters cabbage moths.

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