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Roundup Weed Killer Could Be Linked To Widespread Bee Deaths, Study Finds (npr.org)
An anonymous reader quotes a report from NPR: A new study [published in the Proceedings of the National Academy of Sciences] by scientists at the University of Texas at Austin posit that glyphosate -- the active ingredient in the herbicide -- destroys specialized gut bacteria in bees, leaving them more susceptible to infection and death from harmful bacteria. Researchers Nancy Moran, Erick Motta and Kasie Raymann suggest their findings are evidence that glyphosate might be contributing to colony collapse disorder, a phenomenon that has been wreaking havoc on honey bees and native bees for more than a decade. They hope their results will convince farmers, landscapers and homeowners to stop spraying glyphosate-based herbicides on flowering plants that are likely to be pollinated by bees.
"No large-scale study has ever found a link between glyphosate and honey bee health issues," Bayer said in a statement, adding that the new study "does not change that." Bayer noted the study relied on a small sample of individual bees and that it does not meet regulatory research criteria on pesticides stipulated by international guidelines developed by the Organization of Economic Cooperation and Development and other international organizations. Additionally, the company suggested it is "questionable whether the concentrations of the substance tested could at all be absorbed by bee populations in the open over a relevant period of time." According to the report in the journal, the researchers focused on honey bees and used "hundreds of adult worker bees from a single hive" and treated them with varying levels of glyphosate. Editor's note: In June, Germany's pharmaceutical giant Bayer purchased Monsanto, the company that developed Roundup.
"No large-scale study has ever found a link between glyphosate and honey bee health issues," Bayer said in a statement, adding that the new study "does not change that." Bayer noted the study relied on a small sample of individual bees and that it does not meet regulatory research criteria on pesticides stipulated by international guidelines developed by the Organization of Economic Cooperation and Development and other international organizations. Additionally, the company suggested it is "questionable whether the concentrations of the substance tested could at all be absorbed by bee populations in the open over a relevant period of time." According to the report in the journal, the researchers focused on honey bees and used "hundreds of adult worker bees from a single hive" and treated them with varying levels of glyphosate. Editor's note: In June, Germany's pharmaceutical giant Bayer purchased Monsanto, the company that developed Roundup.
Normally big companies don't bother responding to scientific studies. The fact that they did in this case, attempting a character assassination to boot, suggests they are scared. They might even have their own internal data supporting such results.
If that is the case, I can barely imagine the multiple international class action suits that will follow. It will make the smoking debacle look small.
For once The findings have vastly worse implications than the headline. Namely, Round-up isn't poisoning the Bee's themselves it's impairing their symbiotic microbiome. You too have a microbiome, as does the every plant, the soil, and wasps too.
What's interesting here is that previous studies had found that ROund up did kill cells at high doses it wasn't the glycophase that was doing modt of it. It was the packaging "inert" ingredients many of which were detergent-like. It's not a surprise that detergents might harm isolates cells in high concentration.
this one finds the Glycophase itself harms some unknown bacteria that in turn makes the microbiome tank, and the bee's die.
That is a big deal. Much bigger deal than the previous findings.
Some drink at the fountain of knowledge. Others just gargle.
It doesn't necessarily follow.
I know more about mosquito control, since I worked in that industry for decades, but in that field the common pesticides are chosen because they have low toxicity for non-target species and low potential for bioaccumulation because once deployed in the environment they break down rapidly into non-toxic byproducts. I assume that herbicides are approved using similar criteria.
Now herbicides are targeted at the plant kingdoom, and bees are in the animal kingdom. Glycophosphate in particular targets a metabolic pathway that is found in plants and fungi, but not animals. That tells you exactly zero about whether it's harmless to animals; it might kill animals in a completely different way. You have to conduct tests.
Tests show that glycophosphates have a high LD50 (i.e., low toxicity) for animals, but that's acute toxicity. It takes a lot of Roundup to kill an animal outright, but that doesn't mean it can't affect the animals behavior and reproduction in ecologically disruptive ways. If you exposed all humans to a drug which was harmless but made men impotent, human populations would crash even if the drug had an infinitely high LD50.
If this sounds complicated, that's because it is. But that's no reason to throw our hands up in the air and assume everything will be OK. At this point nobody's in any position to state anything definitive about the impact of glycophosphates on bees; this study has successfully opened a question we don't have an answer for yet. But if we study this problem, we'll get a definitive answer. Either way some people might not like that answer, but at least it's a rational basis for making policy.
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According to your source, there were already reductions in feral bees, but those reductions had been attributed to other factors.
Yeah, as far back as 1869 and 1906 - long before glyphosate was invented. The term was coined in 2006 because the rate of loss had nearly doubled - some 40 years after the introduction of glyphosate and following a period of nearly 20 years of near stable populations but had already been assigned a name "disappearing disease" back in 1965 - 5 years before the introduction of glyphosate. (From same source)