Gnats in houseplants - Knowledgebase Question

San Francisco, CA
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Question by mminero316
September 16, 2005
I have gnats in my houseplants. What can I do to get rid of them?


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Answer from NGA
September 16, 2005
Fungus gnats are so annoying! They breed in moist potting soil, so you can break the breeding cycle by allowing the surface of the soil to dry out. If you have plants that need moist soil simply place a quick draining and fast drying layer of gravel or sand on top of the potting soil. This makes an effective barrier and if you use aquarium gravel, you can choose your favorite color. You have to be a little patient with this method because you have to wait through the next generation's maturation before they are gone for good. In other words, once the generation now already in the soil become adults and die off without being able to reproduce, there should be no more gnats. Another method is to use a product called Gnatrol as a soil drench, another is to use an insecticidal soap as a soil drench. Of course, always follow the label instructions carefully. I hope this helps!

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