Magnesium deficiency?
Over watering?
Calcium deficiency?
THANKS IN ADVANCE!
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Mites?
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It could be a few things.
What is room temp/RH
What is EC\PH of feed
Explain your water and dry down cycle
It looks like there is some yellowing which always makes me think lockout due to ph but the tacoing I see from not enough humidity or over watering
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Yeah did you scope for mites…?
It’s looking like you got bed bugs
Get a 100 x scope
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I would definitely rule out mites first. Russet, broad, or spider. If it’s russet your going want to know about it yesterday.
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kinda need some more info, more info the better is the rule when trying to figure out problems… u growing in soil. coco or hydro?? indoor/outdoor? etc… … ph, ec, water temps, water levels, if your in hydro would help alot.
my guess is if your going the rdwc or dwc route, you may have root rot.
Upward curl is also caused by too intense light, or being too close to the lights.
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It’s not just the top tacoing, so it’s probably not lights
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Do it get worse further up the stem?
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I’ve seen this before… It’s a case of the Mights?
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It mite be ^^^
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Might as well be getting into ipm & checking if root bound, check air flow & humidity.
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Without noting parameters of the grow, I would just have to say its to dry as in the plants are dry. Only time I’ve ever had this happen is when my room was to dry for the plant
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Dry and hot is what the mites love. My bet is on mites
With that being said, u can bake the fuck out of ur plants enough to almost kill them but not quite, around 130-140F. It will kill the mites and the eggs
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It just might be
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There is no obvious signs of mites, the speckling they leave behind after pooping and peeing. This look more like the plants surface area is dry and or to close to the lights for this plants liking, im sure it has more to due with the watering or environment over bugs.
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Might? or Mite? I’m being specific for the sake of giggling…
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If there russets ur not gonna see anything to the naked eye until uve got an infestation(rust color)
Plus these pics are of the top of the leaf, we need underskirt pics to see what were playing/dealing with 
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Dont leave out the original 'mit
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