If you have thrips, I'd highly recommend a systemic. Otherwise you'll fight those little buggers forever. I think you need to repeat X number of times for X weeks or months, but someone with more knowledge than I will need to tell you.
So fungicides and insecticides are an issue on y'alls supply chain right now? I guess it's better than a toilet paper shortage... maybe.
---------- Post added at 08:57 AM ---------- Previous post was at 08:56 AM ----------
PS Still think original poster's issue is fungal. But for your thrip issue...
---------- Post added at 09:18 AM ---------- Previous post was at 08:57 AM ----------
imidacloprid is very effective, and should be cheaper.
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