I posted this in the corn forum as a response and thought maybe a few of you might want to here it...
About 4-5 years ago, I had a terrible break out of the little fecal flies/knats and obviously hated them. A friend of mine owns a Feed and Seed store so I asked him if he had any thing to stop knats and flies and he recommended "Golden Malyrin" (I think spelling is ok.
It is in a blue crystal form and comes in a tin can with red and yellow on the lable. I pour a small amount into a container and place it in the snake and rodent rooms and with the product and regular cage cleaning, I rarely have any house flies or other flies or knats. It has a very strong odor when first placed out, but this quickly disapates. My snake room is small, only 8 x 10 and I use about 4-5 table spoon fulls and replace it every 3-4 weeks.
BTW, we place a conatiner in non conspicuous locations on the front and back porches of our house and it drastically reduces the number of flies in these areas during the summer. It really works for me and hope this helps anyone who trys it.
