Is this bud rot or something else?

This happened on a branch underneath the main canopy, which is on top of a screen. All the same I cut it off just be sure; it’s not a critical component of this plant. My question: is it bud rot / mold? I’m thinking no because it’s crinkly instead of slimy, but am wondering since it happened overnight. Nearby branches are not similarly afflicted. Thanks. (PS: low was 42 F this AM but no frost)

Botrytis and it is systemic. That's why it rots your buds from the stem outward, more will be along shortly. Sorry.

Yup. That sucks..

Nice. Bad news but at least I know. So, including this one I have four plants close together. I assume this one is history. If the others don’t show signs (I’ll check them in the AM), should I let them finish outdoors or harvest right away? They’re two weeks from ideal harvest but probably at an acceptable stage.
Or, because they’re all in the same grow (about 12 feet long, 3 feet wide), is the whole thing doomed? 50/50 sativa indica hybrids. Thanks.

Can you show us some pictures of the other ones tomorrow ?

Really do appreciate your help. I’m posting eight picks; two for each plant, one of the canopy and the other of a cola close up. Here’s the plant where I found the mold - so far impacted just the one offshoot mentioned yesterday on this plant.

Plant 2

Plant 3

Plant four. Thanks again.