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How do I get rid of fungus gnats on indoor plants?

Fungus gnats are a common problem for indoor plant owners. They are tiny black flies that lay their eggs in damp soil and their larvae feed on organic matter in the soil. Here are some steps you can take to get rid of them:

  1. Allow the soil to dry out: Fungus gnats thrive in moist soil, so letting the soil dry out between waterings can help. Be careful not to let the plant become too dry, as this can damage it.

  2. Remove affected plant material: If the plant has any dead or decaying material, remove it. This can help reduce the food source for the larvae.

  3. Use yellow sticky traps: Place yellow sticky traps near the plants to catch the adult gnats. The sticky traps are a simple and effective way to reduce the number of adult gnats in your home.

  4. Apply a soil drench: You can apply a soil drench containing Bacillus thuringiensis var. israelensis (Bti) or beneficial nematodes. Bti is a bacteria that kills the larvae of fungus gnats, while beneficial nematodes are tiny worms that eat the larvae. Follow the manufacturer's instructions for application.

  5. Repot the plant: If the infestation is severe, you may need to repot the plant. Remove as much of the old soil as possible and replace it with fresh, sterile potting soil.

  6. Keep the area clean: Sweep or vacuum any debris or fallen plant matter to prevent any build-up that may be attracting the gnats.

It's important to note that even after treating your plants, you may still see a few gnats for a while. But with patience and persistence, you can get rid of them completely.

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