Hi all i have quite a bit of experience with bud rot and hopefully this post can help the community identify, deal with and save your harvest. First off, bud rot or grey mold or botrytis are all names for this shitty condition we deal with on our lovely plants. It can greatly reduce/impact yield and easily kill the plants. Its a pathogenic spore that affects weak/damaged parts of plants and thrives on the food produced by that situation. Helped by humidity it can easily get out of control.