Bruce Harris expects at least a third of the 1,000 bee hives he is hauling back from the almond groves of California’s San Joaquin Valley will die by the end of the year.
The Montezuma County beekeeper soon will begin dividing his 400 strongest hives to create enough new bee colonies to account for the losses he anticipates.
Farther east in La Plata County, first-year beekeeper Paula Nelson already saw losses when one of her two hives died late last fall.
“They never really flourished,” Nelson said.From those running commercial operations to hobbyists with only a few hives, beekeepers in Southwest Colorado have not been immune to the bee die-offs sweeping the nation. And while losses have held steady at about 30 percent during the last several years, this year is looking worse.The U.S. Department of Agriculture has yet to release its annual report about wintertime bee losses, but anecdotal information indicates losses are worse than last year, said Kim Kaplan, spokeswoman with the USDA Agricultural Research Service.
“Anecdotally, and couched with all may’s and might be’s in the world, we are seeing reports of very high losses over this past winter, higher than last winter,” Kaplan said.
Losses don’t discriminate
Tina Sebestyen, founder of the Four Corners Beekeepers Association, said local beekeepers are reporting heavier losses than years past.“Losses that hobbyists experienced this winter seem different than usual,” she said. “It really hasn’t struck our beekeepers like this before.”Brad Milligin, a second-generation beekeeper in the Lewis Arriola area and one of the biggest regional commercial beekeepers, also has seen his bee losses climb a bit this winter.Harris said this year fell somewhere between poor and mediocre. Colonies within his hives were smaller, they weren’t brooding as actively, and they seemed less energetic when they were let out of the hives.
In general, losses were “a heck of a lot higher than normal,” he said. “It must have something to do with last summer or last fall.”
Colony collapse
According to the USDA’s 2012 report, about a third of winter colony losses are attributed to colony collapse disorder, which causes bees to mysteriously leave the hive, leaving the queen bee and honey inside. The definite cause continues to leave beekeepers stumped though recent research is focusing on a relatively new class of pesticides, neonicotinoids, as a potential contributor. The insecticides, which are absorbed and incorporated into the plant, were first introduced in 1991.Last month, a group of beekeepers, environmental and consumer groups sued the Environmental Protection Agency to suspend the use of two types of neonicotinoids. The chemicals make plants potentially toxic to insects, the groups said.
Factors such as poor nutrition, pathogens, mites and cold weather are also a part of the bee die-off picture, and could play a role in colony collapse disorder, Kaplan said. It’s hard to say for sure, though, because these factors are known to cause wintertime dwindling – another malady affecting bees that causes more gradual die-offs within the hive rather than the sudden evacuation that defines colony collapse, Kaplan said.
Confusion about what differentiates colony collapse disorder from over-winter die-offs leads to “all sorts of misdiagnosis,” said Bob Hammon, an entomology and agronomy extension agent with Tri-River area office near Grand Junction.
“People see it so much in the news that they automatically think colony collapse,” Hammon said. “But the reality of the situation is there is a lot of different things that can happen to beehives.”
Milligin and Harris have seen everything from smaller colonies and weaker bees to hives that were completely deserted with honey still inside.
Both said they can only guess that a combination of factors – diseases, parasites, viruses, climate change – is causing bee populations to dwindle.
“We have pushed bees to the edge of what their little immune systems can handle,” Milligin said.
Don Arnold, a Montrose beekeeper, is much more confident that pesticide spraying is killing the nation’s honeybees. Officials in Emery County, Utah, where Arnold kept his bees for almost a decade, sprayed for mosquitoes in the summer of 2011. Within days, 278 of his 300 bee colonies were dead, Arnold said.
Bee die-offs ripple outward
Whatever the cause, the die-off is hurting beekeepers’ profit margins Milligin said. The price for transportation fuel, medicine and extra food, combined with a lower survival rate means the “price per hive has increased dramatically in the last several years,” he said.
Honeybees do play a significant role in the nation’s food supply, helping pollinate an estimated 25 percent of crops in the American diet. But many of Colorado’s crops, and especially those in Southwest Colorado, don’t require bees to reproduce.
Alfalfa, dry beans, grass hay and wheat are self-pollinated or are primarily pollinated by bees other than honeybees, Hammon said.
Almonds are a different story, depending entirely on honeybees for pollination. The continued growth of the multi-billion dollar industry guarantees a future for beekeepers nationwide. Income from almond pollination is a crucial, steady source of income as opposed to the variations honey production can bring, Harris said.
He estimated 75 percent of his income comes from renting his bees for pollination.
“As far as I’m concerned, pollinating almonds is the only thing keeping the whole bee industry afloat,” he said.
In a future with so many changing factors, one thing is for sure, he said.
“It’s going to be survival of the fittest.”
ecowan@durangoherald.com
Bees best-suited to face mite-ey problem?
Tiny mites have long been the enemy of small and large beekeepers alike. The parasites enter cells where bee larvae hatch and mature and can spread throughout the hive and weaken bees, shortening their life span. They can also infect the bees with viruses.
Sue McWilliams, a beekeeper north of Cortez, thinks bees may be able to solve the problem themselves. McWilliams and three other beekeepers in Montezuma County received a two-year $25,000 grant to examine whether letting bees build their own brood cells, where bee larvae develop, may solve the mite problem. The grant is from the Western Area Sustainable Agriculture Research and Education Program.Traditionally, beekeepers buy pre-made foundations that serve as a starting structure for bees to build honeycombs and brood combs. The pre-made cells are a uniform size even though those cells vary in size when the bees themselves build them from scratch. McWilliams’ theory is that sometimes the pre-made cells are too big and leave extra room for mites to migrate in and kill the bees inside.She will test a method that provides bees only a small strip of foundation and lets the queen bee direct workers to build the rest of the cells. The idea is that the worker bees will build cells that are a perfect fit for their needs and no bigger, leaving less space for potential mite intrusions.
McWilliams emphasized that her method allows the bees to create their own solution.
“Improved health through natural methods will create stronger bees that are able to fight off diseases more readily,” she wrote in the grant application.
ecowan@durangoherald.com
