Just For Fun - Guess What Caused This

[Heavily Medicated]

I absolutely know for sure what caused this, but I thought it may be fun to have a little guessing game here to see if it can be guessed. Aside that she is at the end of her life, of note is the round necrotic spots.

Strain: Fast Buds Gorilla Glue
Medium: ProMix and Perilite
3 gallon pot
300 watt LED 18" away
medium pH 6.3 via A8
AN Jungle Juice base nutes, voodoo and piranha first two weeks of life and two weeks at beginning of flowering. GH Silica, GH CaliMagic, Carboload, Big Bud, Overdrive. Feeding only water now, week or so left to harvest. Here are the pics, if you have any questions just ask. I'll reveal the answer when someone gets it, or let's say, tomorrow at noon central time zone.

 

[Yeatster]

More of this kind of game should be done. It would really help peeps learn...me specifically. I'm always looking at sick plants, not saying a word, in fear I will give bad advice.

Really though. I haven't a clue. Interested though

 

[Yeatster]

I'm gonna go with cold temps. Final answer

 

[Heavily Medicated]

I'm gonna go with cold temps. Final answer

Great guess considering the time of year, but not it. The more autumnlike colors are enhanced by cooler night temps though. Guess again if you want. Multiple guesses welcome.

 

[Rifleman]

She's sunburnt.

 

[Fusion420]

I would of said cold Temps due to stems. But since you are using just straight water now. I would guess you using some hard well water to flush and no ph checking. I'm no expert tho. That's my guess.

 

[Renaissance Redneck]

Two questions :
Did they do any foliar apps, and did they have foil as a reflective material?
The way the necrosis maintains the circular shape, even across two different leaves and past the margins, makes me think it's light burn. Maybe even water drops on the reflector itself.
Good idea with the quiz, HM!

 

[Heavily Medicated]

She's sunburnt.

Well I guess that didn't take as long as I thought it might. The round necrotic spots were burned into the leaves and a few buds when the plastic corner on my tent gave in and caused the LED to drop straight down smack dab on top of the girl. I was home and heard the crash and had the LED off of her in less than two minutes. The next day, these spots caused by an individual LED directly on the leaf surface for less than 2 minutes. Some buds got burned too and show the typical bleaching out caused by LED burn, just in little round dots. Great job @Rifleman @Renaissance Redneck

 

[Renaissance Redneck]

Well I guess that didn't take as long as I thought it might. The round necrotic spots were burned into the leaves and a few buds when the plastic corner on my tent gave in and caused the LED to drop straight down smack dab on top of the girl. I was home and heard the crash and had the LED off of her in less than two minutes. The next day, these spots caused by an individual LED directly on the leaf surface for less than 2 minutes. Some buds got burned too and show the typical bleaching out caused by LED burn, just in little round dots. Great job @Rifleman @Renaissance Redneck

My next guess was aphids farting.

 

[NugNoob]

Very cool, fun and informational! Nice idea and thanks for sharing @Heavily Medicated