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Q&A Home

Brian from Harrison Ohio writes,

We need help with fungus gnats.

We have a problem with fungus gnats, they continue to enter our garage because it is cool and die on the floor. We have to vacuum them daily. I have put down BITs in our mulch beds but still the same results. Is there any product that can solve our problem faster?


Using Bifen IT mixed with an IGR should provide you relief. Bifen IT is to be used inside and outside the home, but will only kill the adults as the larvae is protected in its egg form much like a chicken egg is protected until cracked. To control the larvae you would need to mix the NyGuard IGR(birth control) in with the Bifen. NyGuard is labled for fungus gnats as well as a large variety of other insects to sterilize the adults from being able to lay viable larvae. This will control the population drastically in keeping new ones from developing. You should mix 1 ounce of Bifen with 4 ml of NyGuard IGR to each gallon of water you use. Bifen IT can be used as a broadcast over the entire lawn or just as a perimeter treatment. You will want to focus on the mulch bed area and the underside of shrubs, bushes, or trees in the area. Bifen IT is completely safe to spray on ornamentals. In the garage area, spray as crack and crevice and focus on damp areas. Please let us know if you have any further questions.

Answer last updated on: 08/21/2014

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