Markings on fan leaves

[Skuxas]

Hi Team, after a bit of help with my plant, its 3 weeks into flower and overall healthy, but i have been getting some odd markings on some of the fan leaves, its normally on the ones that its about to drop.
Its been very hot recently 35+ degrees, i water every second day or when it needs it and use canna products.​

 

[Bluey]

That's a tough one but I think it may be sooty mould. It's caused by pests on your plants inc aphids and mites. It should wipe off if that it the case. Use rubbing alcohol to gently rub it off. If it comes straight off I'd say it is sooty mould. It doesn't attack the plant but can kill it and can lead to other big issues. Check for botrytis in the bud closest to those leaves. Put a bit of distance between your plants.

 

[Skuxas]

Thanks a lot for the help, really appreciated!