Recipes for knats
Found this on Pintrest
Hi Salina, the only thing I have found for gnats is hot shot no pest strips and you could hang or lay them in your garden. Here is a link to checck them out. They are not very expensive.
Spray them with vinegar.
Add Mosquito Bits they are non toxic safe and kill gnats in soil,lawn,garden,compost etc. and mosquitos(ponds,lakes etc. ).....added bonus. The active ingredient in Mosquito Bits is a biological larvacide called BTI (Bacillus thuringiensis subspecies israelensis). BTI is a naturally occurring bacterium that’s deadly to both mosquito larvae and fungus gnat larvae.
This is a tough one if you live in a climate that is damp/wet since they thrive in moisture. BUT if you have any control of the dampness at all, let the garden dry out completely before rewatering since they are attracted to dampness. Try to water your garden in the early morning so the plants can dry out completely before nightfall.