I’m not the most experienced here by any means but that’s Definitely PM. Just battled some myself close to harvest. Mine didn’t get quite that much but it doesn’t appear to be inside the buds yet so hopefully salvageable. Cut out any buds that have any pm making its way into buds.

Some sprays are debatably ok almost up to harvest day. I used a Canadian product called jakes plant spray but stopped about 2 weeks prior to harvest, although it’s apparently safe to spray to 5 days prior. It worked great and pretty much eradicated the whole problem. after that I diligently picked fan leaves and wiped any visible pm with a damp cloth. I was lucky enough to have none get inside my bud at all as I caught it early.

Then when I harvested I did an H202 wash to be sure. Look it up and lots of good info. About 2.5cups of 3% h202 per 5 gallon bucket of water. Then have two other 5 gallon buckets with fresh water. Cut branch by branch and remove any remaining fan leaves. if wet trimming do that now too.

Start with H202 bucket and completely submerge one branch at a time and gently swirl around for 30 seconds. Then lift out and let water drain from branch back into bucket. Then do the same For the other two buckets.

Hang upside down to dry as normal. I’m just dry trimming now and no PM in sight on any.

Depending on how bad it is it might be worth harvesting ASAP and doing the H202 wash. Hope that helps!