Cabbage Root Maggot. I gotcha. Die. Die Die.

Bottom line is crop rotation.

Organic removal use beneficial nematodes.

Diatomaceous Earth if you steal it from your swimming pool filter, and dust it around, you might have the perfect answer...we said might. Good luck.

 

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For the complete list of pests with pictures, and solutions, on this 500 page website, please click the A to Z link.