Good question. I've never heard of that as a solution. There are other ways to battle them though which may be easier for you. I wrote an article on fungus gnats a few months back. See here: https://www.mrgrowit.com/post/fungus-gnats-on-cannabis-plants
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Good question. I've never heard of that as a solution. There are other ways to battle them though which may be easier for you. I wrote an article on fungus gnats a few months back. See here: https://www.mrgrowit.com/post/fungus-gnats-on-cannabis-plants