Indeed, National Gardening Association forum member Linneaj suggests freezing then baking potting soil to kill fungus gnats — ...
This incorrect potting mix not only created a damp ... completely if you have succulents,' says Vladan. 'Fungus gnats dislike ...
Using a pyrethrin spray or aerosol labeled for gnats or flying insects gets rid of the ones flying about but has no impact on eggs and nests, Jones said.