outdoor white widow unknown deficency/sickness

this years outdoor crop was fucking PERFECT until like 2-3 weeks ago when i started noticing an unknown deficiency starting on the leaves.. at first i thought it looked like a it needed some potassium and foliar fed a weak 0-10-10 fertilizer solution but since then it has only gotten worse and now whole leaves in a couple spots are turning glossy black and dying... any ideas?

looks like nute burn to me

Yikes my man :/ Looks like someone foliar fed them with gasoline

Looks like burn to me..

You should flush and go with plain water from now on..

Looks like chlorine burn. Are you letting your water sit?

No it's sun burn you were feeding during direct sunlight weren't you