THE CAUSE OF DISASTROUS WINTERING.
Epidemic, then, being set aside as no factor in the solution, to what shall we ascribe such wide-spread disasters? I fully believe, and to no branch of this subject have I given more thought, study, and observation, that all the losses may be traced either to unwholesome food, failure in late breeding of the previous year, extremes of temperature, or to protracted cold with excessive dampness. I know from actual and wide-spread observation, that the severe loss of 1870 and 1871 was attended in this part of Michigan with unsuitable honey in the hive. The previous autumn was unprecedentedly dry. Flowers were rare, and storing was largely from insect secretion, and consequently the stores were unwholesome. I tasted of honey from many hives only to find it most nauseating. I fully believe that had the honey been thoroughly extracted the previous autumn, and the bees fed good honey or sugar, no loss would have been experienced. At least it is significant that all who did so, escaped, even where their neighbors all failed. Nor less so the fact that when I discovered eight of my twelve colonies dead, and four more just alive, I cleaned the remaining ones all out, and to one no worse nor better than the others I gave good capped honey stored early the previous summer, while the others were left with their old stores, that one lived and gave the best record I have ever known, the succeeding season, while all the others died.
Again, suppose that after the basswood season in July, there is no storing of honey, either from want of space, or from lack of bloom. In this case brood-rearing ceases. Yet if the weather is dry and warm, as of course it will be in August and September, the bees continue to wander about, death comes apace, and by autumn the bees are reduced in numbers, old in days, and illy prepared to brave the winter and perform the duties of spring. I fully believe that if all the colonies of our State and country had been kept breeding by proper use of the extractor, and feeding, even till into October, we should have had a different record, especially as to spring dwindling, and consequent death. In the autumn of 1872 I kept my bees breeding till the first of October. The following winter I had no loss, while my neighbors lost all of their bees.
Extremes of heat and cold are also detrimental to the bees. If the temperature of the hive becomes too high the bees become restless, fat more than they ought, and if confined to their hives are distended with their fœces, become diseased, besmear their comb and hives, and die. If when they become thus disturbed, they could have a purifying flight, all would be well.
Again, if the temperature becomes extremely low, the bees to keep up the animal heat must take more food; they are uneasy, exhale much moisture, which may settle and freeze on the outer combs about the cluster, preventing the bees from getting the needed food, and thus in this case both dysentery and starvation confront the bees. That able and far-seeing apiarist the lamented M. Quinby, was one of the first to discover this fact; and here as elsewhere gave advice that if heeded, would have saved great loss and sore disappointment.
I have little doubt, in fact I know from actual investigation, that in the past severe winters, those bees which under confinement have been subject to severe extremes, are the ones that have invariably perished. Had the bees been kept in a uniform temperature ranging from 35° to 45° F., the record would have been materially changed.
Excessive moisture, too, especially in cases of protracted cold, is always to be avoided. Bees, like all other animals, are constantly giving off moisture, which of course will be accelerated if the bees become disturbed, and are thus led to consume more food. This moisture not only acts as explained above, but also induces fungous growths. The mouldy comb is not wholesome, though it may never cause death. Hence another necessity of sufficient warmth to drive this moisture from the hive and some means to absorb it without opening the hive above and permitting a current, which will disturb the bees, and cause the greater consumption of honey.