Quantcast
Popular
Pexels

Glyphosate Could Be Factor in Bee Decline, Study Warns

Another study has cast doubt on the environmental safety of glyphosate, the active ingredient in Roundup, the most frequently used weedkiller in the world.


Researchers at the University of Texas at Austin (UT) exposed bees to glyphosate and found that it reduced the beneficial bacteria in their guts, making them more susceptible to disease.

"We need better guidelines for glyphosate use, especially regarding bee exposure, because right now the guidelines assume bees are not harmed by the herbicide," UT graduate student and research leader Erick Motta said in a UT press release. "Our study shows that's not true."

The study, published in Proceedings of the National Academy of Sciences Monday, exposed bees to glyphosate amounts that occur on crops and roadsides and then assessed their gut health three days later.

Of eight common gut bacteria, four were reduced following exposure to glyphosate. The exposed bees also had higher mortality rates when subsequently exposed to the widespread pathogen Serratia marcescens.

The study's authors wondered if glyphosate exposure could be a factor in the decline in U.S. bee populations and recommend that farmers and gardeners stop using glyphosate on flowering plants favored by pollinators.

"It's not the only thing causing all these bee deaths, but it is definitely something people should worry about because glyphosate is used everywhere," Motta said.

Monsanto, the company that made Roundup before being acquired by Bayer AG, disputed the findings.

"Claims that glyphosate has a negative impact on honey bees are simply not true. No large-scale study has found any link between glyphosate and the decline of the honeybee population. More than 40 years of robust, independent scientific evidence shows that it poses no unreasonable risk for humans, animal, and the environment generally," a Monsanto spokesperson said in a statement reported by The Guardian.

RMIT University in Melbourne chemist Oliver Jones also expressed skepticism that the study meant glyphosate was actively harming bees in the environment.

"To my mind the doses of glyphosate used were rather high. The paper shows only that glyphosate can potentially interfere with the bacteria in the bee gut, not that it actually does so in the environment," he told The Guardian.

Other studies have shown that glyphosate can harm bees and other animals, however.

A study published in July found glyphosate exposure harmed bee larvae and another, published in 2015, found bees exposed to levels present in fields had impaired cognitive abilities that made it harder for them to return to their hives, The Guardian reported.

A further study of rats also showed glyphosate exposure harmed gut bacteria.

"This study is also further evidence that the landscape-scale application of large quantities of pesticides has negative consequences that are often hard to predict," University of Sussex Professor Dave Goulson told The Guardian.

Glyphosate's impact on human health has been in the news in recent months after a jury decided in favor of a California groundskeeper who claimed that Roundup exposure caused his cancer and ordered Monsanto to pay him $289 million in damages.

Glyphosate is making its way into human guts too. A recent study found Roundup traces in popular oat-based snacks and cereals.
Show Comments ()

EcoWatch Daily Newsletter

Sponsored
Champurrado (Mexican hot chocolate) is a beloved holiday favorite. PETA

8 Festive Vegan Drinks to Keep You Cozy This Winter

By Zachary Toliver

Looking for warm vegan holiday drinks to help you deal with the short days and cold weather? This time of year, we could all use a steamy cup of cheer during the holiday chaos. Have a festive, cozy winter with these delicious options. (Note that you must be 21 to enjoy some of the recipes.)

Keep reading... Show less
Popular
Pexels

For a Happier, Healthier World, Live Modestly

By Marlene Cimons

Gibran Vita makes every effort to get rid of the dispensable. He lives in a small home and wears extra layers indoors to cut his heating bills. He eats and drinks in moderation. He spends his leisure time in "contemplation," volunteering or working on art projects. "I like to think more like a gatherer, that is, 'what do I have?' instead of 'what do I want?'" he said.

Keep reading... Show less
Climate
An underwater marker in front of Cortada's studio helps predict how many feet of water needs to rise before the area becomes submerged. Xavier Cortada

As Miami Battles Sea-Level Rise, This Artist Makes Waves With His 'Underwater Homeowners Association'

By Patrick Rogers

Miami artist Xavier Cortada lives in a house that stands at six feet above sea level. The Episcopal church down the road is 11 feet above the waterline, and the home of his neighbor, a dentist, has an elevation of 13 feet. If what climate scientists predict about rising sea levels comes true, the Atlantic Ocean could rise two to three feet by the time Cortada pays off his 30-year mortgage. As the polar ice caps melt, the sea is inching ever closer to the land he hopes one day to pass on to the next generation, in the city he has called home since the age of three.

Keep reading... Show less
Food
GMVozd / E+ / Getty Images

How to Ferment Vegetables in Three Easy Steps

By Brian Barth

A mason jar packed with cultured or fermented vegetables at your local urban provisions shop will likely set you back $10 to $15. Given that the time and materials involved are no more than five minutes and $2, respectively, one imagines that the makers of cultured vegetables have spent eight years training with fermentation masters in some stone-age village, or that they've mortgaged their house to pay for high-end fermenting equipment to ensure that the dilly beans come out tasting properly pickled.

Keep reading... Show less
Sponsored
Popular
Orangutan in Sumatra. Tbachner / Wikimedia Commons

Norway to Ban Deforestation-Linked Palm Oil Biofuels in Historic Vote

The Norwegian parliament voted this week to make Norway the world's first country to bar its biofuel industry from importing deforestation-linked palm oil starting in 2020, The Independent reported.

Environmentalists celebrated the move as a victory for rainforests, the climate and endangered species such as orangutans that have lost their habitats due to palm oil production in Indonesia and Malaysia. It also sets a major precedent for other nations.

Keep reading... Show less
Oceans
Australia's Great Barrier Reef. Steve Parish/ Lock the Gate Alliance / Flickr / CC BY 2.0

Scientists Discover 'Most Diverse Coral Site' on Great Barrier Reef

Australian scientists have found the "most diverse coral site" on the Great Barrier Reef, observing at least 195 different species of corals in space no longer than 500 meters, The Guardian reported.

The non-profit organization Great Barrier Reef Legacy and marine scientist Charlie Veron, a world expert on coral reefs, confirmed the diversity of the site, also known as the "Legacy Super Site" on the outer reef.

Keep reading... Show less
Sponsored
Renewable Energy
Buses head out at the Denver Public Schools Hilltop Terminal Nov. 10, 2017. Andy Cross / The Denver Post via Getty Images

Why Aren't School Buses Electric? These Coloradans Are Sick of Diesel

By Corey Binns

Before her two kids returned to school at the end of last summer, Lorena Osorio stood before the Westminster, Colorado, school board and gave heartfelt testimony about raising her asthmatic son, now a student at the local high school. "My son was only three years old when he first suffered from asthma," she said. Like most kids, he rode a diesel school bus. Some afternoons he arrived home struggling to breathe.

Keep reading... Show less
Popular
jessicahyde / iStock / Getty Images

Hemp May Soon Be Federally Legal, But Many Will Be Barred From Growing It

By Dan Nosowitz

Senate majority leader Mitch McConnell has, perhaps unexpectedly to those who find themselves agreeing with only this one position of his, been a major force for legalizing industrial hemp. Industrial hemp differs from marijuana in that it's bred specifically to have extremely low concentrations of THC, the primary psychoactive chemical in marijuana; smoke industrial hemp all you want, it'll just give you sore lungs.

Keep reading... Show less
Sponsored

mail-copy

The best of EcoWatch, right in your inbox. Sign up for our email newsletter!