Garden Pests and Diseases: Black gnat, 1 by onyxwar

onyxwar wrote:
I have a big problem w/ little black gnat's on my indoor and greenhouse plants. I have been spraying them daily w/ a Hydrogen Peroxide mixture and it seems to help, but it is starting to hurt the plants. If I don't spray everyday at the strength I am using it does nothing at all to the gnats. I have tried a couple of sprays from HD and Lowe's, but I don't want to introduce to many pesticides since these are enclosed areas and I don't want to spend 20 bucks on a small bottle of anything either.

Here is a pic of the eggs they are laying on the spinach. I have been wiping them off almost daily, but it is getting to be too much work. My plants inside are not as bad as this, but if I don't do something soon I am sure they will be.
Any help would be appreciated.