Someone wanted pics? This is from another thread I posted. You said no bud worms. Did you dig in those buds good? Is the rot on the stem nodes like pic below? Or inside the buds away from the nodes?
You will see the little dead leaf sticking out of the bud. The leaf will droop down and turn brown and skinny. Follow the leaf stem down to the bud stem and you will see mold. How early you see the dead leaf is how bad the mold will be. Sometimes you will lose just one node section. Sometimes you lose the whole bud or section. Looks for these leafs for both worm mold or just bud rot. What I have noticed is if the dead leaf you spot is still green the mold patch is new. (like in first two pics below) But if the leaf you spot is grey or brown and curled bad. It's a few days old spot and may have spread. (like 3rd pic)
These pics show bud rot or some kind of stem mold that I am fighting now.
If a guy wanted to he could cutthis section out of the plant. Cut out any mold you can see. Then pen torch the area. I have saved huge top colas doing this. (last pics kind of shows end results of torching) Again you got to get it early before the stem rots all the way. If you cut your mold out of a cola IMO you better torch it.
These are the buds that you see cut up in the two pics above. This is when they were on the plant. Shows how good it can hide inside the bud. Notice the brown? A huge factor is how soon you find this and how fast you can cut it out. Pics were at night so not the best. Again the only way to see or spot it is with that single dead leaf.
I can say that dealing with bud rot is better than dealing with bud worms. I say this for if you catch the rot fast it is easy to cut out for it on the node sections. Bud worms just rot right in the middle of the buds.
If you want more info on pen torching so a search of this site for "Stoping Mold with Pen Torch" I have a thread floating in search world.