>It was mentioned on the list that varroa seemed less troublesome in old
combs and this might be due to the reduced size of the cells in the old
comb.

Last spring Dewey Carron spoke a few times at Simon Fraser. In one of his
talks Dr. Caron mentioned that there is a better chance for survival of
brood in older combs than there is in new comb. He did say that it wasn’t
much of a difference but that it could be shown statistically.

Could this be partly attributed to the cleaning activites of the bees? And,
could the reasons for a slightly better survival of brood in older combs
also have a role in slightly deterring varroa....or no?

Regards,
Dick