Whenever the winter weather conditions are suitable, beekeepers
examine their hives. An extremely mild Mid-South winter brought several warm
days with temperatures rising above 50 degrees, allowing bees to fly from their
hives and beekeepers to check them. If the temperature is barely above 50 and
conditions are windy, one can only open the hives briefly. Extensive exposure
can chill and kill brood. If somewhat warmer conditions exist, a more in-depth
examination of hives is possible. We experienced several suitable beekeeping
days in February. Any hive check involves looking for evidence of an egg-laying
queen, ample stores of food, and signs of bee disease. A mid-winter check of
hives revealed colonies with rapidly expanding populations. Queens were laying
eggs in all hives; and while warm weather allowed the bees to fly and consume
lots of honey, all of the hives held adequate food stores.
Hives with lesser populations of bees require particular attention.
Examining one weak hive revealed a small population with no worker brood. I
found the queen shown in today’s photo surrounded by a retinue of attendant
workers constantly stroking her abdomen. However, the queen was damaged; her
wings were incomplete. The queen appeared to be afflicted with Deformed Wing
Virus, one of more than a dozen viral diseases commonly vectored by parasitic
Varroa mites. A queen with deformed wings would have been unable to make her
mating flights as a young adult. An unmated queen cannot lay the fertilized
eggs needed to produce worker bees or queens. Without these bees, the colony is
doomed to collapse. This deformed queen evidently emerged the previous fall.
The workers in the hive were long-lived bees produced by this queen’s mother. Deformed
Wing Virus affects drones and workers more frequently than queens. It is likely
that a female Varroa mite entered the queen cell before it was capped, and then
the parasitic mite transferred the virus to the developing queen pupa. Varroa-vectored
viral diseases cause the loss of many honey bee colonies.
--Richard
Posts
