Popular pesticide hurts wild bees in major field study
Source: AP-Excite
By SETH BORENSTEIN
WASHINGTON (AP) A common type of pesticide is dramatically harming wild bees, according to a new in-the-field study that outside experts say may help shift the way the U.S. government looks at a controversial class of chemicals.
But in the study published by the journal Nature on Wednesday, honeybees which get trucked from place to place to pollinate major crops like almonds didn't show the significant ill effects that wild cousins like bumblebees did. This is a finding some experts found surprising. A second study published in the same journal showed that in lab tests bees are not repelled by the pesticides and in fact may even prefer pesticide coated crops, making the problem worse.
Bees of all kinds crucial to pollinating plants, including major agricultural crops have been in decline for several reasons. Pesticide problems are just one of many problems facing pollinators; this is separate from colony collapse disorder, which devastated honeybee populations in recent years but is now abating, experts said.
Exposure to neonicotinoid insecticides reduced the density of wild bees, resulted in less reproduction, and colonies that didn't grow when compared to bees not exposed to the pesticide, the study found.
FULL story at link.
FILE - In this Aug. 2, 2003 file photo, a bumblebee sits atop a gray-headed coneflower in Dauphin, Pa. A common pesticide is dramatically harming wild bees, according to a new in-the-field study that outside experts say may shift the way the U.S. government looks at a controversial class of chemicals. (AP Photo/Carolyn Kaster, File)
Read more: http://apnews.excite.com/article/20150422/us-sci--bees_pesticides-81b8343e34.html
Buzz Clik
(38,437 posts)The European Union has a moratorium on the use of neonicotinoids and some environmentalists are pushing for the same in the United States. Rundlof conducted her study just before the European ban went into effect in 2013.
"This paper has the potential of really shifting the conversation," said University of Maryland entomologist Dennis vanEnglesdorp, who wasn't part of the study. "Neonics may have a very dramatic effect on these non-managed pollinators in the environment. This is the most definitive work I've seen in the area."
One of the more interesting aspects of Rundolf's study is that she couldn't measure an effect on honeybees, just wild native bees. There may be an effect but it would be under 20 percent, she said. The different species of bees respond differently and that only results in confusion because until now, scientists have used the domesticated honeybees as the model for all bees.
Berenbaum has been warning for years against using honeybees as a model for the wild type (and vice versa), and her sage advice is clearly correct.
JDPriestly
(57,936 posts)day to the next. I suspect it was the insect repellent I used. I don't normally use that stuff. That once I did, and the result was that my bees disappeared.
Bees also need the little flowers my wood sorrel produce in order to become very plentiful. And in the spring when my avocado trees blossom and my wood sorrel blooms, I have an unbelievable number of bees. They are everywhere it seems. I love them. They are small bees, not the normal honeybees.
I think this study is probably correct.
jtuck004
(15,882 posts)two insecticides and various fungicides.[8] As of 2014, about a third of US soybean acreage was planted with neonicotinoid treated seeds, usually imidacloprid or thiamethoxam.[9]
https://en.wikipedia.org/wiki/Neonicotinoid
As if we wanted to kill them off...
truedelphi
(32,324 posts)I have been so discouraged recently.
Even if the madness ended tomorrow, how would the environment heal?
When I dig down into the soil on my property,there is always fungal crap about five to six inches below the surface. Where is it coming from? Is it coming from something happening to the soil from pesticide used some four or five years back?
Is it the planes overhead that are continually up there, spraying god knows what, and which Scandinavian scientists claim is affecting the climate in a most negative way. (Their claim being that the geo engineering itself is responsible for 15% of the climate change overall each year.)
this is an area of the yard that has been well watered, so it is not a result of any drought.
ffr
(22,674 posts)I read this article earlier today. When I tried to research who the "experts" were or find the research backing up the "CCD is abating" claim, I couldn't find any information.
It sure would be nice to know that CCD isn't a concern anymore and we can all breathe a sigh of relief. If only there were references to the research and who these "experts" were who said that.
alfredo
(60,077 posts)The bumblebee could be an important pollinator for cool weather crops. So far I've only seen a couple bumblebees, and they looked pretty gamey.
yellowcanine
(35,702 posts)An individual bumble bee will pollinate a lot more flowers than an individual honey bee and they will continue to pollinate flowers even in cool and rainy weather. Honey bees are fair weather pollinators. But of course a colony of honey bees is so large that the colony can pollinate an enormous number of flowers. Truth is we need both honey bees and bumble bees and also other native bees. Biggest problem for both native bees and honey bees is habitat loss and loss of diversity of plants.
alfredo
(60,077 posts)AtheistCrusader
(33,982 posts)Till now it's been guesses and innuendo, but now we have something solid to use, and I'm totally on board with that. Regulated, banned, whatever it takes. We cannot allow the use of industrial farming technology to damage the environment. We don't allow that for any other industry unregulated and uncontrolled.
chapdrum
(930 posts)(in this case Monsanto, Bayer, Syngenta, ad nauseum) to agree to further studies.