Part 5

=Swarming.=

All colonies do not behave alike as to swarming. (1) There are certain colonies that go through the season with apparently no thought of swarming. Such colonies do the very best work in the supers, and their number can be increased by skillful management. (2) Other colonies start queen cells preparatory to swarming, but can be persuaded to give it up by such mild measures as destroying the queen cells and perhaps removing a few frames of brood. (3) Certain colonies are determined to swarm and, unless the flow ceases, nothing short of swarming or some radical manipulation will satisfy them. (4) A certain percentage of queens fail during the honey flow and swarming may occur in connection with the supersedure. Such colonies usually do very poor work in comb-honey supers.

The beekeeper can do much (1) toward increasing the percentage in the first group and discouraging those of the second--preventive measures, and (2) toward making the most of the colonies under the third and fourth groups--control measures.

=PREVENTIVE MEASURES.=

Some effort has been made toward the final elimination of swarming by breeding from colonies showing the least disposition to swarm. Although after years of selection bees continue to swarm when conditions are favorable, many practical beekeepers testify to having greatly reduced the percentage of swarming colonies by years of careful selection and breeding. It would certainly seem advisable to replace the queens of all colonies which persist in swarming with young queens reared from colonies less inclined to swarm. The swarming problem has also been attacked from the standpoint of the hive and mechanical attachments, finally resulting in the invention of a "nonswarming" hive. More attention has, however, been paid to the prevention and control of swarming by manipulation than along either of the other fines, probably because proper manipulation gives immediate results and is now available as a means of preventing the losses due to swarming. The success in swarm control attained by the best beekeepers is a result of some effort along all three of the above fines at the same time.

Among the manipulations that tend to discourage swarming are (1) the introduction of young queens (preferably reared from selected stock); (2) an abundance of empty comb in the brood chamber at all times previous to the honey flow; (3) prompt work in the supers at the beginning of the flow induced by using "bait sections" or extracting combs in the first super given, thus tiding the colony over one of the critical periods; (4) a judicious manipulation of the supers during the honey flow (p. 41); (5) the use of more nearly perfect worker combs in the brood chamber, since drone comb and imperfect cells (p. 22) have the effect of contracting the brood chamber, thus bringing about a crowded condition; (6) an abundance of ventilation during the honey flow, obtained by means of a large entrance or by raising the hive above the bottom board by means of small blocks; (7) protection of the hive from direct rays of the sun during the hottest portion of the day by some such means as a double cover or shade board; (8) the removal of one or two frames of brood and the substitution therefor of empty combs or sheets of foundation; (9) the destruction of all queen cells provided they contain only eggs or very small larvæ.

If queen cells are well advanced, their destruction usually has little or no effect as a swarm preventive measure. While destroying queen cells in their early stages can not be relied upon as a preventive of swarming, beekeepers who practice examining the brood chambers once a week for queen cells during the swarming season are usually surprised at the number of colonies that can be induced to give up swarming and turn their attention to storing in this way. Such a result at least partly compensates for the large amount of labor required for these weekly examinations.

=CONTROL MEASURES.=

After having taken all precautions as to preventive measures there win still be some colonies that will attempt to swarm when producing comb honey. During poor seasons of course the percentage may be quite low, but during good seasons the conditions are sometimes such that a majority of the colonies may make an effort to swarm. Swarming colonies, however, may be controlled in such a manner that practically as much surplus honey is secured as if the colony made no attempt to swarm. If but a single apiary is being operated and the beekeeper is present during the swarming season, the bees may be permitted to swarm naturally without loss to the beekeeper; but if several apiaries are being operated, it is more economical to employ some method by which swarming may be controlled by visiting each apiary at given intervals during the swarming season, rather than to have an attendant at each.

=Control of Natural Swarms.=

Natural swarms may be managed (1) by allowing them to cluster naturally, then hiving them in the ordinary manner; (2) by the clipped queen method; (3) by the use of queen traps (fig. 13; see Farmers' Bulletin No. 447, pp. 29-30); or (4) by use of the swarm catcher.

This is simply a wire-cloth cage large enough to be set over the hive or be fitted over the entrance. If the attendant is provided with a number of these catchers he can avoid the usual confusion ordinarily occurring when several swarms issue at about the same time. After being caught in this manner the swarms may be hived at the convenience of the beekeeper.

To keep the forces together (1) the swarm without the queen may be returned to its hive, the queen cells destroyed a week later, and the colony afterwards requeened (p. 36); or (2) the brood may be removed from the hive while the swarm is out, after which the swarm with the queen is returned. The former method is useful under some conditions (p. 37), but the latter is the one usually preferred.

When the swarm is hived back without the brood on its old location in this manner, the colony does not lose any of its flying bees and is back at work with renewed energy in the same set of supers it was but a few minutes before so eagerly deserting. Instead of removing the combs from the brood chamber the usual practice is the removal of the entire brood chamber and the substitution of another whose external appearance is the same. This method of swarm management keeps the bees, queen, and supers together and is one of the most satisfactory known. It is not, however, adapted to out-apiaries or any apiaries not having an attendant, and requires considerable time in watching for and hiving swarms.

=USING THE REMOVED BROOD TO BEST ADVANTAGE.=

The disposition of the brood that is left when a swarm issues should be such that (1) no "after-swarms" (swarms resulting from the emergence of a plurality of virgin queens) are permitted to issue and (2) that the emerging workers may be used to the best advantage.

"After-swarming" may be prevented by (1) breaking up the parent colony before any of the young queens emerge, using the unhatched brood elsewhere, (2) by destroying all queen cells but one before any young queens emerge, or (3) by greatly reducing the population of the parent colony just before the young queens emerge.

The term "parent colony" applies to the one in the hive from which the swarm issues and is in common use, though the correctness of the term is questionable.

If swarming occurs at a time when the resulting young bees can take part in gathering and storing the crop of honey, the usual practice is to allow the brood to emerge in a separate hive and later to add these young bees to the colony from which it was taken. Under such circumstances this reenforcement of the swarm is especially desirable, since otherwise its forces are constantly diminishing during the 21 days (the time required for worker brood to develop) immediately following the removal of all its brood. The brood, however, may be used anywhere in the apiary and should be placed where the resulting bees will be most needed. The plans given below make use of at least a part of the emerging bees in reenforcing the swarm from which the brood was taken.

When hiving natural swarms on the old location as suggested above, the old brood chamber is provided with a bottom and cover and set aside, usually with its entrance turned away about 90° from its former position (figs. 14, 15). This is to prevent any field bees returning to the parent colony. A day or so later it is turned about 45° toward its former position (fig. 16) and as soon as the bees have this location of the entrance well marked the hive is placed parallel to the hive on the old stand (fig. 17). So far as the bees returning from the field are concerned, these two colonies are now on the same stand.

The further disposition of the remnant of the brood and young bees may be by any one of the following methods: (1) One week after the swarm issues, or just before the parent colony would cast a second or "after-swarm," it may, when the bees are well at work in the fields, be removed and given a new location. This throws the entire flying force into the colony having the supers, where they are of greatest service, and so depletes the other colony of its flying bees just when the young queens are emerging that "after-swarming" is usually prevented. (2) Before moving it, away the parent colony may be more thoroughly depleted of its young bees by shaking most of them from their combs, adding them of course to the colony with the supers. The comb containing the finest queen cells should not be shaken, since to do so will probably injure the immature queens. Two or three frames should be left with their adhering bees in order that the parent colony will still contain enough workers to care for the remaining unemerged brood. (3) Instead of moving the parent colony away as in (1) above, the bees may all be added to the swarm by shaking them from their combs, and the combs then distributed among nuclei previously prepared. By successive additions of frames of brood these nuclei are finally built up into full colonies and "after-swarming" is prevented. (4) Instead of giving the parent colony a new location, as in (1) above, it may be shifted to the opposite side of the swarm on the old stand (fig. 18) and by thus shifting it from one side to the other at intervals of several days the young bees as they hatch and learn to fly will finally all be added to the colony with the supers. Few beekeepers, however, go to this extreme, as the season usually closes before the latest emerging young bees are thus transferred to the colony with the supers and these later-emerging bees may be used for increase at little if any expense in surplus honey. (5) If increase is not desired, the bees may be added to the swarm on the old stand as before, and after 10 or 15 days the combs of the parent colony still containing some unhatched brood may be used on which to hive another swarm. Before being used for this purpose the bees are of course shaken from these combs and added as before to the swarm on the old stand. (6) If the honey flow is of long duration or conditions otherwise such that the storing colony may prepare to swarm again, the brood chamber of the parent colony may be left by the side of the swarm (fig. 18) until the young queen begins to lay, then restored to its original position on the old stand and the supers transferred to it. The brood chamber containing the old queen is moved to one side, its flying bees thus induced to enter the hive containing the young queen. The two colonies may afterwards be united or the one containing the old queen may finally be moved to a new location for increase. If, when using this plan, a virgin queen or a ripe queen cell is given the parent colony just after the swarm issues, this colony is ready to be restored to its original position on the old stand about a week earlier than if left to requeen itself.

In case the emerging bees are not to be added to the storing colony the brood and young bees may be used in one of the following ways:

(1) They may be used immediately after the swarm issues to build up such colonies as are not strong enough to work in the supers or to build up previously prepared nuclei, as in (3) above. Before being used in these ways the adhering bees are usually added to the swarm.

(2) The parent colony may be placed at once on a new stand and given a laying or virgin queen. To allow such a colony to requeen itself usually results in its casting an "after-swarm," since it becomes quite populous again before the young queens emerge. This plan does not make immediate use of the emerging bees but may be useful under some conditions. (3) If the honey flow is of long duration or is followed closely by a second, two parent colonies, as in (2) above, may be placed upon the same stand, one of which is given a queen but with the queen cells destroyed in the other. After two or three weeks the bees may be shaken from the queenless colony in with the queen-right one. Such colonies are in excellent condition for rapid work in the supers.

=WHAT TO USE IN THE BROOD CHAMBER WHEN HIVING SWARMS.=

(1) The use of narrow strips of foundation 1 inch or less in width in the brood chamber offers some advantages. (a) When the brood chamber contains only these narrow "starters" and supers of partly filled sections are transferred from the parent colony to the new swarm at the time of hiving, there being no cells below in which to store the honey, it is taken to the supers. Under these conditions work in the brood chamber goes on slowly, the work of the colony being largely in the supers. (b) Colonies that are thus required to construct a set of new combs in the brood chamber and that are supplied with sufficient storage room seldom attempt to swarm again during the same season, even though the flow be of long duration. (c) The treatment of brood diseases may be combined with swarm control. (See Farmers' Bulletin No. 442, p. 14.) The greatest objection to their use is in the excessive amount of drone comb usually built when anything less than full sheets of foundation are used, especially if the queen is old or the brood chamber large in proportion to the size of the swarm.

(2) The use of full sheets of foundation in the brood frames has the decided advantage of resulting in straight combs having the maximum number of cells of the worker size, but is more expensive than the narrow strips and allows a more rapid building of comb in the brood chamber, which under some conditions is considered a disadvantage.

(3) The exclusive use of either narrow strips or full sheets of foundation in the brood chamber when hiving swarms necessitates the use for a short time of a queen excluder (fig. 2) if the supers are transferred from the parent colony to the swarm at the time of hiving, since otherwise the queen would probably enter the sections and a brood nest be established there. To avoid the use of queen excluders for this purpose, one or more empty combs maybe used in each brood chamber, the remaining frames containing full sheets of foundation. This empty comb also serves as a storage place for pollen that may be gathered before the other combs of the brood chamber are constructed. Otherwise this pollen may be stored in the sections (p. 46). It is also probable that fewer colonies will "swarm out" or desert their hives if hived in a brood chamber containing one or more empty combs than if foundation only is used. A disadvantage of this plan is that the cells near the top bar of the comb may be so elongated as to interfere with the complete drawing out of the foundation in the adjacent frame. Empty combs can not well be used in connection with narrow strips of foundation, since their use favors the construction of drone comb.