[ExI] bees

[Henry Rivera]

I know Spike follows this topic.

>From today's PBS Newshour.

-Henry


Are pesticides to blame for the massive bee die-off?

Video: http://www.pbs.org/newshour/bb/are-pesticides-to-blame-for-the-massive-bee-die-off/


TRANSCRIPT

JUDY WOODRUFF: In this week when we think about food, we take a look
now at the vital role bees play in getting some of your favorite
dishes to the table, and the way commercial beekeepers in the U.S. are
struggling to keep their bees healthy.

Allison Aubrey of National Public Radio has our report.

The story is part of the NewsHour’s ongoing collaboration with NPR.

ALLISON AUBREY: It’s harvest time at Adee Honey Farms in Bruce, South
Dakota. Bret Adee’s the third generation to manage the 80,000 hives
the Adees have scattered across five Midwestern states. He says
beekeeping these days is much harder than it’s ever been.

BRET ADEE, Adee Honey Farms: In 2010, our bees were just destroyed in
a couple of weeks. Most of our bees died.

ALLISON AUBREY: Bret says things really haven’t improved much.

BRET ADEE: I would to see about twice to three times as many bees in
most of the hives right now. It will be a real challenge to keep them
alive through the winter.

ALLISON AUBREY: The Adees are not alone. According to a preliminary
survey from the U.S. Department of Agriculture, commercial beekeepers
lost 42 percent of their colonies last year. Bees are a critical part
of agriculture.

Adee trucks his bees out to pollinate California’s almond groves every
year. And it’s not just almonds. Bees pollinate everything from apples
to cherries and squash. To figure out what’s plaguing the bees, the
Obama administration assembled a task force last year. Scientists at
the EPA, USDA and researchers across the country who have been
studying the problem are finding there are multiple issues.

Bees have fewer wildflowers to forage on due to a loss of habitat.
There’s viruses that pests pass on to the bees. Climate change is
thought to play a role too. Another issue is pesticides. Some studies
suggest that a class of pesticides known as neonicotinoid, or neonics
for short, are harming the bees.

These pesticides are coated onto the seed of about 80 percent of the
corn that’s grown in the United States and about half the soybeans
too. To get a sense of that scale, imagine a cornfield like this
taking up the entire state of California. That’s how much of this
pre-treated seed is being planted.

CHRISTIAN KRUPKE, Purdue University: This is what corn seeds look like
after they have been treated.

ALLISON AUBREY: The pesticide is put onto the corn before it’s ever planted?

CHRISTIAN KRUPKE: That’s right.

ALLISON AUBREY: Christian Krupke is an entomologist at Purdue
University who studies bees. His research shows that neonicotinoids
can harm bees.

What is a neonicotinoid?

CHRISTIAN KRUPKE: A neonicotinoid is — as the name would suggest, it’s
based on nicotine. They’re less toxic to mammals, which is a big
feature in their wide adoption. But they are more toxic to honey bees
and to other insects.

ALLISON AUBREY: Neonics are a relatively new class of pesticide. They
have been around since the early 1990s. They are easier for farmers to
use than the traditional method of spraying crops. And according to
researchers at Penn State University, their use has increased more
than 11-fold since 2003. Companies that sell them are making billions
of dollars.

CHRISTIAN KRUPKE: Virtually all of these large acre plants are being
treated. So, the level of use is way out of step with the level of the
threat. In most fields, and where we have worked, we just haven’t been
able to find levels of pests that would justify the level of use.

ALLISON AUBREY: Krupke published a study that linked bee deaths with
the pesticide-laden dust that flies up during the planting of the
pre-treated corn seeds.

CHRISTIAN KRUPKE: We collected some of those bees and analyzed them
and found neonicotinoids on them and in them, so there is an
intersection between planting these crops and killing foraging honey
bees.

ALLISON AUBREY: Bayer CropScience is one of the leading manufacturers
of neonicotinoids. Bayer’s chief scientist, David Fischer,
acknowledges Krupke’s findings, but he says Bayer has a seed lubricant
that reduces the dust. He says that, outside these acute exposures,
neonicotinoids are not harmful to bees.

DAVID FISCHER, Bayer CropScience: We have done those studies. And
those studies basically show, if you spray the product, it’s not safe
for the bees. If you apply the product to the soil or as a seed
treatment, the level of residues that gets up into the plant is in a
safe range.

ALLISON AUBREY: Christian Krupke is not convinced.

CHRISTIAN KRUPKE: We find these pesticides in the water. Bees drink
water. Plants use water. We find that wildflowers that grow near these
areas also have some of these pesticides in them. You add that up over
the course of a season, and, yes, we do find concerning levels.

ALLISON AUBREY: Krupke says those levels do not kill the bees, but may
leave them more vulnerable.

Bayer’s chief scientist says the major threat to bees is a mite that
punctures the honey bees body and feeds on its blood. It’s known as
the Varroa mite. And a recent report issued by President Obama’s task
force also points to the mite as one issue.

DAVID FISCHER: Eighty percent of the problem is Varroa mites and the
viruses and the diseases those viruses cause.

ALLISON AUBREY: But some beekeepers suspect the increased use of the
newer pesticides is making their bees more vulnerable to the mite.

BRET ADEE: For 15 years, we managed that Varroa mite and kept our
losses under 5 to 8 percent. Now we’re losing 50 percent of the bees
every year.

ALLISON AUBREY: Pesticide manufacturers, including Bayer and Syngenta
have launched campaigns of their own to boost bee health. Both
companies are planting millions of flowers in the U.S. to increase bee
forage.

And in 2014, Bayer CropScience opened this $2 million bee care center
in North Carolina, where they conduct workshops and tours.
Environmentalists say these initiatives are a diversion from the real
problem, the pesticides these companies manufacture, something Fischer
rejects.

DAVID FISCHER: Bayer has actually been in the business of providing
products to beekeepers for more than 20 years. It’s not something that
we just started doing.

ALLISON AUBREY: Beekeepers in Europe came out in force a few years ago
in support of the European Union’s partial ban on the use of some of
these neonics.

And here in the U.S., the Environmental Protection Agency says it will
speed up a safety review and likely not allow any new uses of the
pesticide. Environmental groups are locked in several court battles
challenging the EPA over the registration of these pesticides.

Manufacturers maintain that neonics are vital for increasing crop
production and safer than spraying.

DAVID FISCHER: They’re extremely valuable. They increase crop yields
often by 20 percent vs. the other competitors. So, they contribute
billions of dollars to the ag economy in the United States.

CHRISTIAN KRUPKE: That would be true if these products, these
neonicotinoids, were indispensable to these crops, to agriculture, but
they’re not.

Some of our own work in corn and the work of others in the United
States has shown that it’s very difficult to consistently show a yield
benefit.

ALLISON AUBREY: Lucas Criswell farms close to 2,000 acres of corn,
soybeans, wheat and rye in Pennsylvania’s Susquehanna Valley. He has
stopped using treated seed because he found it wasn’t only killing the
bad pests, but the pests he needed to ward off the slugs that were
eating his soybean crops.

LUCAS CRISWELL, Farmer: The soil in our fields are a huge ecology of
different critters and insects. And they’re all there. We need good
and bad. It takes a balance of them all, and that’s what we have seen.

ALLISON AUBREY: Criswell now keeps pests at bay in his fields by
planting crops that encourage beneficial insects. The treated seeds
cost more, so this method ends up being cheaper for him.

Is it too soon enough to say whether you’re getting the same yields?

LUCAS CRISWELL: Is there corn growing on that hill? It grew.

ALLISON AUBREY: It looks like a lot of corn.

Earlier this year, President Obama’s task force called for a
reevaluation of the pesticides. And, consistent with the president’s
requirements, the EPA has expedited its review.

I’m Allison Aubrey of NPR News for the PBS NewsHour in Bruce, South Dakota.