josieskid said:I sprinkled Sevin on my seedlings just one time, over a month ago, on 11/22/2019.
Like I said on here earlier, I left it on for four days. Boy, does it work! I never see any fungus gnats! Not a one! I'm glad I did it! 
Are you putting it on the leaves or on the soil surface...?
I've been using the mosquito bits.... 1/4 of a tsp in the bottom of the 8oz cup followed by 1/2 cup of potting soil, another 1/4 tsp of the mosquito bits, more potting soil and then another 1/4 tsp mosquito bits. I mix in the bits and spritz with water as I add to the cup, plant the seeds, and cover the cup with a ziplock bag....
Seems to be working although not 100%, but definitely helps.
Only water from the bottom once the seeds sprout...
If I see anything flying, I reach for the Raid House and Garden bug spray (green can).......
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