im pretty sure that i know what this is and have started treatment with the "Hotbox Sulfume" so i hope if its what i think!? it will be clear in a few days?
The leaves have been taken from the lower third of plants and the plants have suffered earlier in veg with 20 plants packed into a very compact area so not much light saw the lower third of the plant, so i reckon i know how i got? The plants are now entering their 2nd week in final pots using West Adv + and 25% mix JI No2 no feeding only water at the moment every 4th day.
The plants have now a better environment in which to grow and the numbers reduced to 12 assorted varities as seen below!
Right!
Cheers as always
Ben