Wednesday, July 23, 2014

Is the U.S. in the midst of a bee-pocalypse? The science says no.

See Why the Buzz About a Bee-pocalypse Is a Honey Trap: Populations of the pollinators are not declining and a ban on neonic pesticides would devastate U.S. agriculture. From the WSJ. By
Bee populations in the U.S. and Europe remain at healthy levels for reproduction and the critical pollination of food crops and trees. But during much of the past decade we have seen higher-than-average overwinter bee-colony losses in the Northern Hemisphere."
"Citing this disorder, antipesticide activists and some voluble beekeepers want to ban the most widely used pesticides in modern agriculture—neonicotinoids ("neonics" for short)—that account for 20% of pesticide sales world-wide. This would have disastrous effects on modern farming and food prices."

"neonics are much safer for humans and other vertebrates than previous pesticides."

"Yet there is only circumstantial or flawed experimental evidence of harm to bees by neonics. Often-cited experiments include one conducted by Chensheng Lu of the Harvard School of Public Health that exposed the insects to 30-100 times their usual exposure in the field."

"According to University of Maryland entomologist Dennis vanEngelsdorp, no cases (of collapse) have been reported from the field in three years

The reality is that honeybee populations are not declining. According to U.N. Food and Agriculture Organization statistics, the world's honeybee population rose to 80 million colonies in 2011 from 50 million in 1960. In the U.S. and Europe, honeybee populations have been stable—or slightly rising in the last couple of years—during the two decades since neonics were introduced, U.N. and USDA data show. Statistics Canada reports an increase to 672,000 honeybee colonies in Canada, up from 501,000, over the same two decades."

"Australian honeybee populations are not in decline, despite the increased use of [neonicotinoids] in agriculture and horticulture since the mid-1990s."

"In April the EU released the first Continent-wide epidemiological study of bee health in Europe, covering 2012-13 (before the EU's neonic ban went into effect). Seventy-five percent of the EU's bee population (located in 11 of the countries surveyed) experienced overwinter losses of 15% a year or less—levels considered normal in the U.S. Only 5% of the EU's bee population (located in six northern countries) experienced losses over 20%, after a long, severe winter."

"A ban on neonics would not benefit bees, because they are not the chief source of bee health problems today. Varroa mites are, along with the lethal viruses they vector into bee colonies. If neonics were dangerous, how to explain that in Canada, Saskatchewan's $19 billion canola industry depends on neonics to prevent predation by the ravenous flea beetle—and those neonic-treated canola fields support such thriving honeybee populations that they've been dubbed the "pastures for pollinators.""

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