bud rod is usually very obvious....with visible mould fuzz and the weed will blacken and soften. the bud in the picture looks fantastic and i can't really see any rot. if you do find some though, cut out the rot and save the bud if you can. the first outdoor grow i did was with bag seed and one of the plants was sativa dominant and wasn't finished until late october/early november......i had quite a bit of rot on her and it was a shame cutting off all that bud. lesson learned. outdoor plants on vancouver island are better suited as indicas.