Skip to Content.
Sympa Menu

livingontheland - [Livingontheland] Are GM Crops Killing Bees?

livingontheland@lists.ibiblio.org

Subject: Healthy soil and sustainable growing

List archive

Chronological Thread  
  • From: "TradingPostPaul" <tradingpost@riseup.net>
  • To: livingontheland@lists.ibiblio.org
  • Subject: [Livingontheland] Are GM Crops Killing Bees?
  • Date: Fri, 23 Mar 2007 13:04:53 -0700


SPIEGEL ONLINE - March 22, 2007, 06:21 PM
URL: http://www.spiegel.de/international/spiegel/0,1518,473166,00.html

COLLAPSING COLONIES
Are GM Crops Killing Bees?

By Gunther Latsch
A mysterious decimation of bee populations has German beekeepers
worried, while a similar phenomenon in the United States is gradually
assuming catastrophic proportions. The consequences for agriculture
and the economy could be enormous.



Is the mysterous decimation of bee populations in the US and Germany
a result of GM crops?

Walter Haefeker is a man who is used to painting grim scenarios. He
sits on the board of directors of the German Beekeepers Association
(DBIB) and is vice president of the European Professional Beekeepers
Association. And because griping is part of a lobbyist's trade, it is
practically his professional duty to warn that "the very existence of
beekeeping is at stake."

The problem, says Haefeker, has a number of causes, one being the
varroa mite, introduced from Asia, and another is the widespread
practice in agriculture of spraying wildflowers with herbicides and
practicing monoculture. Another possible cause, according to
Haefeker, is the controversial and growing use of genetic engineering
in agriculture.

As far back as 2005, Haefeker ended an article he contributed to the
journal Der Kritischer Agrarbericht (Critical Agricultural Report)
with an Albert Einstein quote: "If the bee disappeared off the
surface of the globe then man would only have four years of life
left. No more bees, no more pollination, no more plants, no more
animals, no more man."

Mysterious events in recent months have suddenly made Einstein's
apocalyptic vision seem all the more topical. For unknown reasons,
bee populations throughout Germany are disappearing -- something that
is so far only harming beekeepers. But the situation is different in
the United States, where bees are dying in such dramatic numbers that
the economic consequences could soon be dire. No one knows what is
causing the bees to perish, but some experts believe that the large-
scale use of genetically modified plants in the US could be a factor.

Felix Kriechbaum, an official with a regional beekeepers' association
in Bavaria, recently reported a decline of almost 12 percent in local
bee populations. When "bee populations disappear without a trace,"
says Kriechbaum, it is difficult to investigate the causes, because
"most bees don't die in the beehive." There are many diseases that
can cause bees to lose their sense of orientation so they can no
longer find their way back to their hives.

Manfred Hederer, the president of the German Beekeepers Association,
almost simultaneously reported a 25 percent drop in bee populations
throughout Germany. In isolated cases, says Hederer, declines of up
to 80 percent have been reported. He speculates that "a particular
toxin, some agent with which we are not familiar," is killing the bees.

Politicians, until now, have shown little concern for such warnings
or the woes of beekeepers. Although apiarists have been given a
chance to make their case -- for example in the run-up to the German
cabinet's approval of a genetic engineering policy document by
Minister of Agriculture Horst Seehofer in February -- their
complaints are still largely ignored.

Even when beekeepers actually go to court, as they recently did in a
joint effort with the German chapter of the organic farming
organization Demeter International and other groups to oppose the use
of genetically modified corn plants, they can only dream of the sort
of media attention environmental organizations like Greenpeace
attract with their protests at test sites.

But that could soon change. Since last November, the US has seen a
decline in bee populations so dramatic that it eclipses all previous
incidences of mass mortality. Beekeepers on the east coast of the
United States complain that they have lost more than 70 percent of
their stock since late last year, while the west coast has seen a
decline of up to 60 percent.

In an article in its business section in late February, the New York
Times calculated the damage US agriculture would suffer if bees died
out. Experts at Cornell University in upstate New York have estimated
the value bees generate -- by pollinating fruit and vegetable plants,
almond trees and animal feed like clover -- at more than $14 billion.

Scientists call the mysterious phenomenon "Colony Collapse
Disorder" (CCD), and it is fast turning into a national catastrophe
of sorts. A number of universities and government agencies have
formed a "CCD Working Group" to search for the causes of the
calamity, but have so far come up empty-handed. But, like Dennis
vanEngelsdorp, an apiarist with the Pennsylvania Department of
Agriculture, they are already referring to the problem as a potential
"AIDS for the bee industry."

One thing is certain: Millions of bees have simply vanished. In most
cases, all that's left in the hives are the doomed offspring. But
dead bees are nowhere to be found -- neither in nor anywhere close to
the hives. Diana Cox-Foster, a member of the CCD Working Group, told
The Independent that researchers were "extremely alarmed," adding
that the crisis "has the potential to devastate the US beekeeping
industry."

It is particularly worrisome, she said, that the bees' death is
accompanied by a set of symptoms "which does not seem to match
anything in the literature."

In many cases, scientists have found evidence of almost all known bee
viruses in the few surviving bees found in the hives after most have
disappeared. Some had five or six infections at the same time and
were infested with fungi -- a sign, experts say, that the insects'
immune system may have collapsed.

The scientists are also surprised that bees and other insects usually
leave the abandoned hives untouched. Nearby bee populations or
parasites would normally raid the honey and pollen stores of colonies
that have died for other reasons, such as excessive winter cold.
"This suggests that there is something toxic in the colony itself
which is repelling them," says Cox-Foster.

Walter Haefeker, the German beekeeping official, speculates that
"besides a number of other factors," the fact that genetically
modified, insect-resistant plants are now used in 40 percent of
cornfields in the United States could be playing a role. The figure
is much lower in Germany -- only 0.06 percent -- and most of that
occurs in the eastern states of Mecklenburg-Western Pomerania and
Brandenburg. Haefeker recently sent a researcher at the CCD Working
Group some data from a bee study that he has long felt shows a
possible connection between genetic engineering and diseases in bees.

The study in question is a small research project conducted at the
University of Jena from 2001 to 2004. The researchers examined the
effects of pollen from a genetically modified maize variant called
"Bt corn" on bees. A gene from a soil bacterium had been inserted
into the corn that enabled the plant to produce an agent that is
toxic to insect pests. The study concluded that there was no evidence
of a "toxic effect of Bt corn on healthy honeybee populations." But
when, by sheer chance, the bees used in the experiments were infested
with a parasite, something eerie happened. According to the Jena
study, a "significantly stronger decline in the number of bees"
occurred among the insects that had been fed a highly concentrated Bt
poison feed.

According to Hans-Hinrich Kaatz, a professor at the University of
Halle in eastern Germany and the director of the study, the bacterial
toxin in the genetically modified corn may have "altered the surface
of the bee's intestines, sufficiently weakening the bees to allow the
parasites to gain entry -- or perhaps it was the other way around. We
don't know."

Of course, the concentration of the toxin was ten times higher in the
experiments than in normal Bt corn pollen. In addition, the bee feed
was administered over a relatively lengthy six-week period.
Kaatz would have preferred to continue studying the phenomenon but
lacked the necessary funding. "Those who have the money are not
interested in this sort of research," says the professor, "and those
who are interested don't have the money."





  • [Livingontheland] Are GM Crops Killing Bees?, TradingPostPaul, 03/23/2007

Archive powered by MHonArc 2.6.24.

Top of Page