Quote:
Originally Posted by efisakov
Hello from NJ
I was planting marigolds alongside of my tomatoes because gnats do not like them (gnats eat roots as you know probably). I mulched the entire plants into the soil. I wonder if making tea with marigold and watering infected plant would help. Other way to deal with gnats is to water somewhat dry soil (top 2 inches where the gnats are) with mixture of 1 part peroxide (regular 3%) with 4 parts water. It does not harm the plant. I used it on my infected home plants and saved them from the gnats. I hope it is not gnats and something less invasive or just deficiency of calcium or something like that. Good luck.
Ella
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Doesn't the BT used for mosquitoes also kill gnats?