I have no idea, but I have some questions.. Have you grown that strain before, or know what strain it is?
I've burned plants pretty bad and I've looked at a lot of pictures of burns, I've never seen a leaf fall apart like that before.
Yeah, I know it is making me mad. This is my 2nd room. Room #1 is doing great, no problems and they are side by side. I though pests also but none are to be found with the exception of a few small white flies. Using GH 3 part. PPM's started out light at 1000 and slowly upped to 1300 now in the second week of flowering with the addition of 1/4 strength Beastie Bloom at start of flower.
Lights are 1 600 W HPS and 4 LED (Experimenting with the LED, they work great for veg but checking flower with the addition of supplemented HPS) in a 4x6 ebb and flow tray. Temps fluctuate between 78 and 60F. Plants are in 4x4 rockwool on top of hydroton watered 3 times on light cycle. Strains are mixed with Blue Dream, OG, Green Crack and Bubba Kush. The Blue Dreams look the worst of all of them. Using regular tap water with a ppm of 400 but aerated for 24 hours before adding to rez to let some of the chlorine evap.
If I missed something let me know and someone please tell me you have seen this one. The only thing I can think of is that I sprayed for bugs as soon as I saw the flies in the room and shortly after this occured.
Thanks,