what do you call a few 3 or 5 a week or 25 a day.
if you find sat less than 5 in a week thats just normal death duties but your bees should clear them out very quickly and not just leaving them there, any where between say 10 to 20 a week i would start to look at other problems, ie are they in the same spot so has something tried to gain access and they have died durring the fight ect or are they spread out, try spreading a white sheet below the hive entrance to see if you are getting spray damage bees flying in but not making it, at this time of year a lot ot insecticide gets used on allotments and fields, more than 20 in a week i would look towards a brood problem, is there an old boy or lady that can give your hive the once over for you