If it's bud rot and you don't see caterpillars then it's the rain and the RH. I don't think additional defoliating will help here as you want the plant to have fans to feed the buds. Some strains are more susceptible, and when you grow outside (or inside with high RH areas and no dehuey), it comes with the territory.
I would pull each individual bud away from the adjoining buds and the stem to get airflow in and around them, and then just keep an eye out for anything new. Take it off as soon as you see it and hope the rain stays away.
I would pull each individual bud away from the adjoining buds and the stem to get airflow in and around them, and then just keep an eye out for anything new. Take it off as soon as you see it and hope the rain stays away.