Sixty percent of bee hives in US survived year

2015-05-13 20:42
A pollen covered bee sits on a sunflower in Sehnde in the region of Hannover, northern Germany. (Julian Stratenschulte, AP, dpa)

A pollen covered bee sits on a sunflower in Sehnde in the region of Hannover, northern Germany. (Julian Stratenschulte, AP, dpa)

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Washington - More than two out of five American honeybee colonies died in the past year, and surprisingly the worst die-off was in the summer, according to a federal survey.

Since April 2014, beekeepers lost 42.1% of their colonies, the second-highest rate in nine years, according to an annual survey conducted by a bee partnership that includes the US Department of Agriculture.

"What we're seeing with this bee problem is just a loud signal that there's some bad things happening with our agro-ecosystems," said study co-author Keith Delaplane at the University of Georgia. "We just happen to notice it with the honeybee because they are so easy to count."

But it's not quite as dire as it sounds. That's because after a colony dies, beekeepers then split their surviving colonies, start new ones, and the numbers go back up again, said Delaplane and study co-author Dennis vanEngelsdorp of the University of Maryland. But that pushes the bees to their limited, he said.

What shocked the entomologists is that is the first time they've noticed bees dying more in the summer than the winter, vanEngelsdorp said. The survey found beekeepers lost 27.4% of their colonies this summer. That's up from 19.8% the previous summer.

Seeing massive colony losses in summer is like seeing "a higher rate of flu deaths in the summer than winter," vanEngelsdorp said. "You just don't expect colonies to die at this rate in the summer."

Oklahoma, Illinois, Iowa, Delaware, Maryland, Pennsylvania, Maine and Wisconsin all saw more than 60% of their hives die since April 2014, according to the survey.

"Most of the major commercial beekeepers get a dark panicked look in their eyes when they discuss these losses and what it means to their businesses," said Pennsylvania State University entomology professor Diana Cox-Foster. She wasn't part of the study, but praised it.

Delaplane and vanEngelsdorp said a combination of mites, poor nutrition and pesticides are to blame for the bee deaths.

Dick Rogers, chief beekeeper for pesticide-maker Bayer, said the loss figure is "not unusual at all" and said the survey shows an end result of more colonies: 2.74 million hives in 2015, up from 2.64 million in 2014.

That doesn't mean bee health is improving or stable, vanEngelsdorp said.

Read more on:    us  |  insects  |  agriculture

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