What is this yellow stuff on this bud?

It’s only on one side of that one bud, I can’t tell a difference from the smell, however I haven’t smelt mold before.

Probably powdery mildew

Looks like it is bleached from being too close to a light.

How could I tell?

waterproof808 said:

Looks like it is bleached from being too close to a light.

Click to expand...

That is a possibility

mold definately mold! Dont smoke that, yucky, pick it off, smoke good stuff. Looks like it was too wet when cured, and its mold, degraded bud. Looks ok elsewhere. Picture fuzzy figured it is too.

if it wasn't like that when you chopped it it's definitely powdery mildew. I tossed one of last batches because of that.

Break open the bud, while wearing a face mask and far from your grow room. If you get a little puff of dust, that's mold spores and indicates you have PM/mold.

Yeah, id toss that shit before spores shoot up, attach to your clothes and somehow get to your plants or other bud. Im not 100% sure, but it looks close enough that i wouldnt take that risk.