Double Screen Board

Honey bees produce queens on three occasions: when the colony reproduces through swarming, when the colony replaces its queen through supersedure, and in emergencies when the colony loses its queen. We can make colony divisions and produce queens by setting up hive conditions for a colony to produce an emergency queen. Honey bees detect the presence of their queen by the queen substance pheromone that she secretes. This pheromone is passed through the hive by touch, unlike her other pheromones which are aromas carried in the air. The queen’s retinue of attendant workers constantly stroke the queen, gathering queen substance pheromone and passing it to nearby workers. The pheromone is passed from bee to bee throughout the hive. As long as the bees receive queen substance pheromone, the colony is content. If the queen is not present in the hive, the colony detects her loss within one hour and begins replacing her within four hours.

Beekeepers employ the loss of queen substance pheromone to perform colony divisions known as “walk-away splits.” They can accomplish the production of a new queen and make a colony division using a double screen board. This simple device is a board with two screens separated so that queen substance cannot be passed between hive brood boxes. When placed between the brood boxes of a strong hive with bees and brood on both sides of the screens, one half of the hive is content, and the other half feels that it is queenless and starts producing an emergency queen from a young worker larva. This larva is fed royal jelly throughout its development into a virgin queen. After its emergence as an adult, the virgin queen exits the hive for her mating flights through an entrance in the double screen board. She will begin laying eggs in about one month from the time of starting the procedure. In today’s photo workers return at the double screen board entrance with pollen to feed the new queen’s brood.

--Richard

April is Busy

 

April is the busiest month for bees and beekeepers. Populations of bees are expanding toward their maximum, and flowers are coming into bloom in abundance. Bees eagerly gather nectar and pollen to produce brood food for rapidly expanding colonies. Heavy springtime nectar flows often lead to brood nest congestion when nectar is stored in the brood nest. Without available cells for the queen to lay eggs, the colony divides and swarms, with swarming reaching a peak in April and May. Beekeepers attempt to capture swarms of bees, as these have the potential of growing rapidly into productive colonies. For those hives that lose a large population of bees through swarming, it usually means the loss of the year’s honey crop. April saw periods of nice weather, conducive to bees’ foraging, interrupted by periods of extreme weather. Numerous thunderstorms and tornadoes along with severe localized flooding lingered across Arkansas and neighboring states. Some bee hives were overturned by strong winds, and some were flooded.

 

April found beekeepers busy expanding their operations. Bee Day activity at Bemis Honey Bee Farm in Little Rock attracted beekeepers from throughout the region to pick up hundreds of packages of bees and nucleus colonies. I participated in speaking sessions held throughout the day. Dr. Cameron Jack of the University of Florida spoke on varroa mite and small hive beetle integrated pest management practices, and he described his ongoing research on seasonal varroa mite treatments. Bo Sterk and Dave Westervelt of Bees Beyond Borders, www.beesbeyondborders.org, spoke on swarms and splits, common mistakes made in the bee yard, and feeding bees among other topics. Dr. Jon Zawislak of the University of Arkansas described queen genetics, and I spoke on honey bee communications. An interested group followed my presentation on ethical beekeeping. I joined Bo and Dave who remained in Little Rock for two days of beekeeping workshops, sharing their experience, much of it involving their training of beekeepers across the Caribbean. Today’s photo: catalpa, a prolific bee forage tree.

--Richard