Help: Beautiful Colas Wilting at Tips. Long, hot LA summer.

A board, strategically propped against the pot helps shade the roots. Allow airflow to the base, tho. Keeping it off the ground/concrete helps, too.
Doubtful a catterpillar would result in this kind of damage...looks more like a root thing to me. But I'd remove them, just the same, lol.
Harvest times are subjective, but it does depend on what you are looking for in your smoke. Earlier harvest (cloudy trichomes) generally equates to a lighter effect. (still able to get up to get your own munchies) Longer flower times (till trichomes turn a bit rusty-looking) generally give more of a "holy crap I'm too stoned to move" effect.

Couple more questions...

Can you slip it out of the pot and look at the condition of the roots? Would look for being rootbound, see if there's healthy white growing tips on the roots, and check for more bugs.
Were you spraying the tops with anything? If so...do you know the ph of the spray?

You should never put a plant from outside that has questionable pest/disease indoors...IMO it sounds like nute burn...
Good Luck

so it was fucking CATERPILLARS!!!

I've pulled like 6 of those fuckers.. They get inside the buds and just eat them from the inside.. anything above dies.

This is extremely lame. I would rather it be heat or dryness, or wtvr. There is really nothing i can do except pull them off.. but i somehow have a feeling i will only find more tomorrow.. and what's more, there are probly more lurking that i couldnt find... Apparently this is a somewhat common problem with outdoor (and it sounds like it is common for it to happen just a couple weeks out from harvest).

So if nothing else, learn from me.. Shoulda been spraying caterpillar killer over the last couple months.

Thanks for the advice/help from you guys.. Let me know if anyone has succesfully dealt with this problem before.

Ughh, who woulda thought stupid effing caterpillars?!? these things have essentially destroyed what would have been a perfect harvest..............