Tuesday, 30 July 2019

Recent research contradicts a claim by the chemical giant, Bayer, that its newest bug-killer is safe for bees.

by Larry Powell

A honeybee colony in Manitoba. A PinP photo.
It's brand name is "Sivanto," (generic name - flupyradifurone). It's an insecticide designed to kill a wide range of bugs which eat food crops such as soybeans. Bayer is registering it in many jurisdictions around the world. 

After conducting various field studies, 
Bayer concludes, "Sivanto displayed a very promising safety profile." The company concedes, it works in ways similar to the neonicotinoids (a group of insecticides which has become notorious for its likely role in pollinator decline). Still, it finds, the product "can be considered safe to most beneficial insects, specifically pollinators." 
Image by Brian Robert Marshall.

But a team of scientists at the University of California, San Diego, reaches a different conclusion. In findings published earlier this year, the team gave a range of Sivanto doses to the bees, including ones they encounter in the field. By itself, the chemical did not appear to be harmful. But, when combined with the fungicide propiconazole (brand name "Banner Maxx"), widely-used by farmers, the harm was "greatly amplified." The bees either sickened or died, apparently because the fungicide weakened their ability to shake off the toxicity. It's not uncommon for pollinators to be subjected to a dizzying array of pesticides all at once, while foraging in the fields. It’s a process called "synergism," in which they can suffer harm they would not,  if  exposed to just a single one.

The spokesperson for the team, Dr. Simone Tosi, tells PinP, she does not believe that regulations in the US require manufacturers to test for synergistic effects when they apply to have their products approved. But neither does she think that such regulations prohibit such testing.


In a news release, her team says, "We believe this work is a step toward a better understanding of the risks that pesticides could pose to bees and the environment. Our results highlight the importance of assessing the effects pesticides have on the behaviour of animals, and demonstrate that synergism, seasonality and bee age are key factors that subtly change pesticide toxicity." They call for further studies to better assess the risks to pollinators.

But at least one of those other studies has already been done. It, too, comes up with similarly negative conclusions. A team from
 three German universities has found that flupyradifurone binds to the brain receptors of honeybees, damaging their motor skills.

Meanwhile, Bayer's marketing plans for its new product are ambitious. It promises to "develop, register and sell" Sivanto in many places across the world, including the US, Europe, Asia, Ghana and Brazil. While Canada isn't mentioned, specifically, there seems little doubt it will end up here, too. The company wants to see its product "in all major climatic zones allowing agriculture."

Last April, over three months ago, I e-mailed the federal Minister of Agriculture, Marie-Claude Bibeau, Canada's Pest Management Regulatory Agency, Manitoba's Minister of Health, Kelvin Goertzen and Manitoba’s Deputy Minister of Agriculture to ask them about this new research and whether Sivanto will be registered in Canada. 
Apart from a couple of automated responses, I have gotten no substantive answers. 

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Saturday, 27 July 2019

Amazon deforestation accelerating towards unrecoverable 'tipping point'


The Guardian
Data confirms fears that Jair Bolsonaro’s policy encourages illegal logging in Brazil. 
Story here.
The Amazon rainforest near Manaus, capital of the
Brazilian state of Amazonas (largely untouched by human hands,
so far).Photo by Neil Palmer/CIAT.

Thursday, 25 July 2019

‘You can’t drink money’: Kootenay communities fight logging to protect their drinking water


The Narwhal
In Glade, BC, where clear-cutting could begin any day, determined residents are pulling out all the stops in an effort to protect their local creek — even though a judge ruled they have no right to clean water. Story here.
The south end of Kootenay Lk.
Photo by Shawn from Airdrie, Canada.

Wednesday, 24 July 2019

Modern Climate Change Is the Only Worldwide Warming Event of the Past 2,000 Years


Smithsonian.com
New research finds that previous periods of warming and cooling driven by natural causes were regional shifts in temperature rather than global events. Story here.
A grey heron suffers during a heatwave - 2013.
Photo by Gail Hampshire from Cradley, Malvern, U.K


The smell, the noise, the dust: my neighbour, the factory farm

The Guardian
Industrial farms are spreading across Europe. Greenpeace campaigners went to talk to the people who live close by.Warning: readers may find some of the images upsetting. Story here.
Dead hogs in a dumpster at a Manitoba factory barn,
awaiting removal to an unknown location. A PinP photo.
Please also read -"In Hogs We Trust."  
A critique of Manitoba’s runaway hog industry.





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