u/TadpolePractical9714

I noticed this on three of my Burley 64 plants. I thought it might just be something caused by the environment or by the leaves growing too quickly (since it’s occurring on only the biggest leaves on these plants). However, now I’m curious if it’s TMV. I moved the plants away from my other crop, and none of the other plants show the same symptoms (yet).

The marks seem to be more than just discoloration. They’re more like thin patches, where I’m able to see through the leaf more (not entirely, but there’s only a thin film of leaf-matter).

The other day I noticed some of my bigger plants had droopy leaves. I thought that maybe I’ve been over-watering or the humidity in my greenhouse has been too high. I tried messing with the humidity level as best I could, but the plants only seemed to get droopier. Then, I realized that I haven’t been giving them any dark time. So I turned off the grow lights that night for 8 hours, and turned them back on the next morning. That seemed to do the trick and the plants seemed healthy and perky again.

A few days have passed since then, and I’ve continued turning off the lights at night, so they’re getting 16/8 hours of light/dark. However, yesterday (possibly the day before) I noticed the plants drooping again. Some of them are getting pretty big, so I thought maybe they’re a bit cramped and unhappy. I figured it’s about time I try to harden them a bit, and get them acclimated to the outside environment. So I took the largest 18 plants and put them outside for a few hours, hoping they’d get perkier. No luck. I’d say they’re even a little droopier than before.

I’m not entirely sure what the issue is, so I’m also not sure what to do. Am I right in suspecting that I’m overwatering or that the greenhouse is too humid?
I’ve been watering each plant 5mL each night, directly at the base of the stalk using a blunt syringe. Is that too much?
I got a cheap hygrometer/thermometer from Walmart, and it’s been measuring the ambient temp consistently between 65-75F (I think it’s been higher a couple times, but never above 80F). The humidity is almost always between 65-85% although the last couple days I’ve noticed it getting up to 90%, which is partly why I’ve been suspecting that as the culprit.

Any ideas what I’m doing wrong, and how I can help my crop?

The first 4 pics are of the plants the morning after I started doing 16/8 light hours.
Pic 5 is of the plants I took outside. I left them outside for 3 hours.
The last 4 pics are the plants after I brought them back inside.

Thanks so much everybody!