the most dangerous is not when their flying around,,,,,,theyre deep into the soil where it is moist..the larva...they do the most damage...
gnatrol is very gppd...flush and flush and they die....yellow strips catch them
but your main thing is to get them while theyre larvas......bastards////
remember when you over water your plants, its a gnats favorite..
Is gnatrol legal still in usa?.//i remember geting it in a unmark bottle...expensive too.....but good...