In message <[log in to unmask]>, Allen Dick <[log in to unmask]> writes > While it seems I do recall more chalkbrood >around the outer edges, it seems to me that chalkbrood can as easily >be found in the centre of the middle brood comb. Yup. What I've never understood is why it can be dotted around affecting individual larvae. Surely if its because you've chilled the brood (or upped the humidity) the whole patch on the whole comb will be spoilt ? Isn't more likely the bees missed cleaning the spores off that particular larva ? -- Dave Black Blacks Bee Gardens, Guildford, GU1 4RN. UK.