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Lynn from Chicago, Il writes

Does Bio Advanced Complete Insect Killer For Soil & Turf kill fungas gnats?

You can't walk in our yard without being swarmed by gnats. Will this at least kill the larvae in the lawn to end the life cycle of these pests?


Bio Advanced Complete Insect Killer For Soil & Turf is not labeled to kill gnats. 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. 

Answer last updated on: 06/02/2021

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