Pest Management

How to: Manage Onion Fly Maggots in Your Garden

Onion Fly Maggots blog post
The adult onion fly resembles the house fly, but smaller. The larvae are legless and creamy-white and will cause the plants to wilt and die.
Treatment Options:
  • Attracting birds or parasitic wasps can help you fight these onion maggots.
  • Sprinkling cayenne pepper or chili pepper can help prevent the laying of eggs.
  • Placing insect netting (floating row covers) over your garden will help to protect your plants against the onion fly maggot.
  • Another prevention is to place sand or diatomaceous earth at the base of the plant to deter adult flies from laying eggs.

Plants to Especially Watch:

  • Onions
  • Chives

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