Colony collapse disorder (CCD), the mysterious phenomenon characterized by adult bees abandoning the hive, may be due in part to an undiscovered microbe, but the malady “is going to be with us for awhile,” Extension apiculturist Eric Mussen predicted at the recent “Bee Informed” reception at the Citizen Hotel Historic Ballroom, Sacramento.

The event, a benefit for the Häagen-Dazs Honey Bee Haven at the Harry H. Laidlaw Jr. Honey Bee Research Facility at the University of California, Davis, raised $600 for the bee garden, a half-acre bee-friendly garden planted next to the facility.

Featuring desserts and drinks made with honey, along with honey tasting, the Bee Informed event “buzzed with happy guests,” said coordinator Elaine Baker, pastry chef at the Citizen Hotel/Grange Restaurant. “It was gratifying to see so many people interested in honey bees and how we can help and protect them,” Baker said.

Area beekeepers offered the guests a taste of honey, and also honey for sale.

Mussen, a noted honey bee authority and member of the UC Davis Department of Entomology faculty since 1976, updated the crowd about colony collapse disorder and talked about the health of honey bees.

“The news media wrongfully reports that 33 percent to 35 percent of our nation’s honey bees are dying of CCD,” he said.

“Thirty-three to 35 percent is the average; only 25 percent of beekeepers have reported CCD in their colonies. Some lost 40, 80 or 100 percent of their hives due to CCD. So CCD is not killing 33 percent of our bees.”

Mussen said that declining bee populations are not new. Beginning in the late 1800s, bee journals reported major colony losses every 10 to 15 years, he said. “The worst years were 1963, 1964 and 1965.”

“And,” Mussen said, “we’ve actually have had CCD since 2004. It  was brought to the attention of the news media in the winter of 2006-2007). “And we’re going to have CCD for awhile, too.”

CCD may be due to a multitude of factors that weaken the colony, he said. These include diseases, parasites, pesticides, malnutrition and stress. “There may be a new virus we haven’t found yet.”

Mussen also talked about what bees do.

“Bees must regulate the temperature and humidity of the hives, keeping the hive around 94 degrees for the brood,” Mussen said. In hot weather, the bees suspend their collection of nectar, pollen and propolis and just collect water, needed to cool the hive.

“Bees can use up to one gallon of water a day during the hot weather and use this for evaporative cooling,” he said. If it’s too hot in the hive, the wax will melt and the brood will die.

Mussen said baby bees grow rapidly. “In six days, a baby bee will weigh 1,000 times as much as it did when it hatched. That’s like an 8-pound baby weighing 4 tons in six days.”

During the spring and the rapid build-up period in the hive, a queen bee can lay 2,000 eggs a day, but later, this drops to about 1,000 a day, Mussen said. “Workers live only six weeks, so they have to be replaced to keep the colony from dying out. About 1,000 foragers die each day — mostly in the field. They just wear out.”

With CCD, “the brood is not being fed and, the hive is not being kept at the proper temperature. What we have are adult bees gone, but usually the queen bee left with dying brood but plenty of food storage.”