Should I harvest the contaminated plant(s) right n...

Brother you DO NOT want to smoke that!!! Anything that’s contaminated with bud rot should be thrown away. I’ve smoked it and was vomiting bile of 2 weeks it wasn’t nice. I would still advice you to wash your buds in a 1%H2o2 solution to kill any of the spores left over. And YES harvest immediately! Get 2 buckets and hydrogen peroxide put a mixture of h2o2 and tap water in 1 bucket then just plain tap water in the other keep the water warm around 20c to prevent losing too many trichomes. Dip your buds on the stems into the 1st bucket and stir for 10 seconds. Then straight into the second bucket with just water. Then hang dry with a fan blowing on them for 24 hours. Then proceed to dry properly as you would if you hadn’t washed the buds.

Hi there ! Looking at your trichs,there's still many clear ones.. my way would be: get it out from the other, to avoid problems with bugs on the other plants.. And maybe let it a little bit more maturing, on a window or balcony... Try to keep 12/12 schedule, of course if there's bugs everywhere chop it.

I’m not familiar with this bug but I’d definitely get rid of any infected plants in order to reduce the likelihood of contaminating anything else