Whilst I was browsing through my photos, I've found one that is showing early signs of cannabis bud rot.
There is nothing more devastating for a grower to see his weed turning mouldy. Unfortunately there is only that much you can do to protect your weed from getting mouldy but that's another subject.
As you can see on the photo above yellow leaves are probably the first signs of bud rot in cannabis. Usually the buds start rotting in the base of the yellow leaves and if you pull the leaves they will pop out easily.
What do you do if that happens? Not a lot unfortunately! Turn off your oscillating fans and get a plastic bag, a pair of gloves and pair of scissors. Gently place the plastic bag over the rotten bud and cut the stem right under the rotten bud. Make sure you take that rotten cannabis bud miles away form your grow room! Make sure you sterilise the scissors if you ever plan to use them again!
p.s I've got some more bad news for you. If you ever find one be prepared to find more..keep your eyes wide open!