- Hydrogen peroxide kills fungi in the potting soil and on the plant body by airing it out and reducing moisture. ... Fungus gnats feed on fungi and enjoy moisture.
- Mix one part 3% hydrogen peroxide with four parts water and pour it over the soil. This mixture will fizz as it attacks the larvae. Be sure to let the soil dry out afterward to prevent the gnats from returning.
- Combine three parts of water with one part 3% hydrogen peroxide in a spray bottle. Gently mist the plant's leaves, being thorough in your application. This procedure deters the adult gnats and creates an inhospitable environment for any potential ...
Wait until the top 2 inches feel drygnats hate that. Prepare mix. Use the 1:4 ratio above. Drench the soil. Water thoroughly from the top. Let excess run off. Handle the fizz. It bubbles as larvae dienormal and satisfying. Set traps. Place yellow sticky traps nearby for adults. Monitor. Check daily for new flies. Repeat every 7-10 days for 3 weeks. In my trials, this combo drops populations by 80% in two treatments. For how to dilute hydrogen peroxide for fungus gnats, always start weaker if your plants are sensitive, like succulents.
