Unusual Leaf problem, should I be concerned?

Three weeks or so from outdoor harvest, Mr. Nice ( g13 x hashplant)
Noticed a few leaves with unusual colorations, am concerned it might be some kind of mold? Or maybe just end of life symptoms ( Sucking nutes from leaves?)

I'm concerned about that white colored band between the live leaf and the dead. I have been trimming them off when I find them.

Please check the pictures and give your opinion :

thats nute burn

yeah def not natural causes

^ what he said

Ok then its not a fungas attacking the leaves then. Nute burn I can live with and correct, Fungas is a bitch to fight.

What nutes? Kinda blurry but check for mites too.

Yea, the leaves have a strange blue tint to them LOL. SORRY
Burned, what are you using?
Can you put up some pics with the lights off so the color is normal?

Outdoors, worm casting tea + maxsea. Yes I do have mites, but I don't wish to spray this close to harvest . Blue tint could be camera setting, still not used to all the settings on it
Went ahead and cut off all affected leaves as a precaution. I figure this close to harvest I'll just cut back on feeding them and let it go at that.