If there is no mould present when the bud was irradiated and it was irradiated in a sealed bag, then I can not see how mould could grow on it. A full and proper irradiation will kill all microbial life. It won’t remove spores, but they’ll no longer be active. The issues isn’t really the spores as such, it’s their toxins, and as I said previously, no amount of radiation will get rid of toxins. Only really chemicals and heat,
So, if this was bagged and irradiated immediately then that mould had to be present before bagging. If that bud sat around in a bag for maybe a few months in another market, say, Europe, before needing to be irradiated when hitting uk shores,…. Then yes mould could form, and will likely have toxins on that amount of mould,
So, there is a small minor possibility that that bud could pass a regs test in uk with that level of mould, so long as toxins are not present. This doesn’t make it acceptable of course. So radiation will remove the activity of the mould spore, kill it, but won’t actually remove its spores, which of course you don’t really want to be inhaling, active or not,
I’ve not seen any direct mould on any
MC, I’ve had mould on plenty of BM over the decades, I’ve grown crops that would mould, but as you has said, that mildew smell is present in a few and it’s very off putting…