What kills fungus gnats on indoor plants?

There are several methods to kill fungus gnats on indoor plants, including: Using sticky yellow cards: These trap the adult gnats, preventing them from laying more eggs. Neem oil: This organic pesticide can be used to kill the larvae, adult gnats, and also prevent them from laying more eggs. Diatomaceous earth: This is a natural powder made from fossilized algae that can be used to dry out and kill the larvae. Bacillus thuringiensis (BT): This is a bacteria that is toxic to the larvae of gnats and other insects but is safe for humans and pets. Hydrogen peroxide: A diluted solution of hydrogen peroxide can be used as a soil drench to kill the larvae and eggs of gnats. It's best to use a combination of these methods for the most effective control of fungus gnats on indoor plants.