I've been dealing with similar. Look at your stem structure. Not at all a straight cell structure.
Root hairs missing in patches. Those areas have the 'crud'. Simultaneously the leaves fold and
bend. Seemingly overnight.
My issue came with the snow melt. Air quality changes from dry to very humid with all the rain.
A few fungus gnats. Not an infestation. One of the life stages is not interested in the sticky traps.
As if immune.
I lost just a quarter of a tray. Perfectly healthy plants next to some that went down. Some of those
survived. I sprayed with stylet-oil then buried the stems deeper. I still do not have a solution or if
two things are going on simultaneously.
Not convinced it is the lights since I have 600 healthy plants and lost about 30.
Some of those I left on the end of the deck headed for the garbage un-cared-for. Some have
survived even ignored. But clearly stunted in growth.
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