Those fungus gnats appear harmless and don't seem to be damaging your plants but the larvae are damaging your roots.
If you see flyers, you have lots of them in your soil. A female fungus gnat can lay 200 eggs and 90% of fungus gnats are female. The damage is slow and progressive. while it will most likely not kill your plant, it will affect your yields and you will start to see necrosis on older leaves, and nothing will match any deficiency charts. I use the bacteria also. The company that makes mosquito dunks has a new product.
You sprinkle it on the soil and it is introduced with each watering.
It is called Mosquito Bits, and is less messy. I sprinkle all my plants soil with this now.
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