I noticed this condition this morning (see pic) on my O.G. Kush.
These are bottom older leaves.
Disregard the tip burn, I did that a while back. 😀
She is nearing the end, so I don't know if this is typical necrosis for the age, or over nutrient, or lock out (or something else).
I doubt there is time to fix it before harvest, but I would like to know what's going on for future grows.
Per Gallon:
2g Jack's A
2g Jack's B
2g Epsom
1.2g M-P-K
2.0 EC
I have seen this happen when I let them dry out too much toward the end of flower, I'm sure that's not the only thing that can cause it. Make sure your blumats are working properly. I just found my autowatering system not working again, a few leaves look just like this. But if you are day 75 of flower, you have nothing to worry about. Just strip em off and keep on Rollin! 
Definitely not end of life necrosis. Your feed level looks high to be this far along especially with autos. In coco I'm much lower by this point in the run. If it were me I'd flush the pot and refeed at a lower rate but please remember that I'm not a soil grower so maybe wait till some of them chime in.
Random acts of kindness make the world a better place
Just strip em off and keep on Rollin!
Nooooo...... There's still good stuff in those damaged leaves that the plant can make use of. Each of those leaves is like a battery for the plant and she will push all that goodness into the flowers if she needs it. They might look bad but there's still lots of stuff stored in there.
Random acts of kindness make the world a better place
@monkeydo fair enough! Once they are tapped and completely shriveled strip em off. Haha.
One more thing.
Would you please go by my Grow Diary (Double Grape & OG Kush) and take a look at the trichomes I posted today?
I think I'm seeing a few milky trikes now. Just curious about what others see.
I know it's not completely conclusive, but have a look and tell me what you think.
Click Here: for my current grow diary
Go to Day 77
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