EPA rejects petition to ban the herbicide 2,4-D, formerly a component of Agent Orange

By Andrew Pollack / The New York Times

The Environmental Protection Agency on Monday said that the widely used herbicide 2,4-D would remain on the market, denying a petition from an environmental group that sought to revoke the chemical’s approval.

The E.P.A. said that the environmental group, the Natural Resources Defense Council, had not adequately shown that 2,4-D would be harmful under the conditions in which it is used.

“At best, N.R.D.C. is asking E.P.A. to take a revised look at the toxicity of 2,4-D,” the E.P.A. said in its decision, which was posted on its Web site.

“Yet the ground for tolerance revocation is a lack of safety.”

First approved in the late 1940s, 2,4-D is one of the most widely used weed killers in the world. It is an ingredient of numerous home lawn-care products, and it is used by farmers.

Dow Chemical is thought to be the major manufacturer, though the E.P.A. has also approved versions from Nufarm, an Australian company, and Agro-Gor, a joint venture of PBI/Gordon of Kansas City, Mo., and Atanor of Argentina.

Use of the chemical is expected to grow substantially in the coming years because Dow is seeking federal approval to sell seeds of corn genetically engineered to be resistant to 2,4-D.

Farmers planting that corn would be able to spray 2,4-D on their fields to kill weeds without hurting the crop. Now, 2,4-D is not used much on corn, the nation’s most widely grown crop.

The council filed its petition in 2008 asking that the registration of the herbicide, as well as the permissible residue levels on various foods, be revoked. In February, it sued the E.P.A., saying the agency had not acted on the petition fast enough.

The group cited various studies suggesting that exposure to 2,4-D could cause cancer, hormone disruption, genetic mutations and neurotoxicity. It also said the E.P.A., in previous assessments, had underestimated how much people, especially children, might be exposed to the chemical through dust, breast milk and skin contact.

In its ruling, the E.P.A. said that while some studies cited suggested that high doses of the chemical could be harmful, they did not establish lack of safety, and in some cases they were contradicted by other studies.

The agency in particular cited a study, financed by the 2,4-D manufacturers and conducted by Dow, in which the chemical was put into the feed of rats. The study did not show reproductive problems in the rats or problems in their offspring that might be expected if 2,4-D were disrupting hormone activity, the E.P.A. said.

James W. Gray, executive director of the industry task force that sponsored the study, hailed Monday’s decision.

“E.P.A. has done a thorough job in evaluating all the evaluable data and found no cause for concern,” he said.

Mae Wu, a lawyer with the council, said the group was “disappointed that it has taken this long to deny our petition” and also “disappointed that they are not protecting public health by getting this toxic chemical off the market.” She said it was too soon to say what the group’s next step would be, though it will have the right to object to the ruling.

The E.P.A. has reviewed the safety of 2,4-D several times, particularly with regard to an increased risk of cancer.

Some studies have shown a higher risk of non-Hodgkin’s lymphoma among farmers who use the chemical. But E.P.A. reviewers have said the farmers might have been exposed to many things, making it difficult to state that 2,4-D was the cause.

After reviewing the data, the agency renewed the registration for 2,4-D in 2005. In 2007, it declined to conduct a special review of the cancer risk, saying that it had “determined that the existing data do not support a conclusion that links human cancer to 2,4-D exposure.”

2,4-D was an ingredient of Agent Orange, a defoliant used in the Vietnam War that is said to have harmed many Vietnamese civilians and American soldiers. Most experts say the main health problems came from contamination of 2,4,5-T, the other major ingredient in Agent Orange.

From The New York Times: http://www.nytimes.com/2012/04/10/business/energy-environment/epa-denies-request-to-ban-24-d-a-popular-weed-killer.html

Study finds that pesticide exposure during pregnancy appears to pose risks equivalent to smoking

By Lynne Peoples / Huffington Post

An expectant mother’s exposure to commonly used pesticides might pose risks to her developing fetus comparable to those long associated with tobacco smoking, new research suggests.

In both cases, a fetus exposed to such chemicals during a mother’s pregnancy might result in childbirth taking place a few days earlier and the newborn could weigh at least one-third of a pound less than when there’s no such exposure. And this is not research about babies born to moms who spray chemicals on crops or who work for Orkin, either.

“This is not an unusual group,” said Dr. Bruce Lanphear, about the women who were studied. “These are women exposed primarily through diet and perhaps pesticides used in and around the yard,” said Lanphear, a researcher on the study of organophosphate pesticide exposure published Thursday in Environmental Health Perspectives.

Nearly all pregnant women carry pesticide residues in their bodies. The new study’s 306 expectant moms — from a diverse range of economic and racial groups and from urban, suburban and rural areas in and around Cincinnati — were no exception.

Lanphear and his team calculated an average 150-gram reduction in baby birthweight (about one-third of a pound) and a half-a-week earlier welcome into the world when they compared the 15 percent of the women in the study with the highest exposure to the 15 percent studied who had the lowest exposure to organophosphate pesticides, as estimated from chemical byproducts in their urine. The high exposure women had 10 times the level of pesticide in their bodies as those in the low exposure group.

“Preterm birth is probably the single most important factor for infant mortality,” said Lanphear, adding that preterm birth and low birthweight have also been linked to a range of future health problems, from cognitive problems to heart disease.

“Maybe for an individual child the exposure is not a major risk factor,” said Lanphear of Simon Fraser University in Vancouver. “But when you shift the entire population downward by 150 grams, it can have a dramatic impact.”

A drop in womb time from 39 and a half weeks to 39 weeks, for example, might not be detrimental. But if a developing fetus is already at risk for being born preterm — say, at 34 weeks — because of other factors, then another half a week could prove significant.

Even babies born at 37 weeks, at the threshold of what is considered full term, the reduction of time in the womb appears to have negative effects such as an increased risk of asthma, suggests a separate study published in March.

What’s more, a pregnant woman is generally around more than one toxic chemical in her daily life. She might be exposed to a combination of different pesticides, while also smoking or breathing air polluted by coal-fired power plants. On their own, experts warn, each exposure could cause trouble; together, the risks could add up — or worse.

From Huffington Post: http://www.huffingtonpost.com/2012/04/05/pesticides-pregnancy-babies-health_n_1406468.html

Studies link common pesticides to 50% decline in honeybee populations

By Damian Carrington / The Guardian

Common crop pesticides have been shown for the first time to seriously harm bees by damaging their renowned ability to navigate home.

The new research strongly links the pesticides to the serious decline in honey bee numbers in the US and UK – a drop of around 50% in the last 25 years. The losses pose a threat to food supplies as bees pollinate a third of the food we eat such as tomatoes, beans, apples and strawberries.

Scientists found that bees consuming one pesticide suffered an 85% loss in the number of queens their nests produced, while another study showed a doubling in “disappeared” bees – those that failed to return from food foraging trips. The significance of the new work, published Science, is that it is the first carried out in realistic, open-air conditions.

“People had found pretty trivial effects in lab and greenhouse experiments, but we have shown they can translate into really big effects in the field. This has transformed our understanding,” said Prof David Goulson, at the University of Stirling and leader of one of the research teams. “If it’s only one metre from where they forage in a lab to their nest, even an unwell bee can manage that.”

Prof Mickaël Henry, at INRA in Avignon, France, who led a separate research team, said: “Under the effects we saw from the pesticides, the population size would decline disastrously, and make them even more sensitive to parasites or a lack of food.”

The reason for the huge decline in bee numbers has remained uncertain, but pesticides, the varroa mite and other parasites, and destruction of the flower-rich habitats in which bees feed are believed to be the key reasons. Pesticide manufacturers and the UK government deny a class of the chemicals called neonicotinoids cause significant problems for bees, but Germany, Italy and France have suspended key insecticides over such fears.

A spokesperson from Department for Environment, Food and Rural Affairs (Defra) said the new research did not change the government’s position. “The UK has a robust system for assessing risks from pesticides and all the evidence shows neonicotinoids do not pose an unacceptable risk to honeybees when products are used correctly. However, we will not hesitate to act if presented with any new evidence.” Henry said the new research showed current approval processes for the pesticides are inadequate: “We now have enough data to say authorisation processes must take into account not only the lethal effects, but also the effects of non-lethal doses.”

The pesticides investigated in the new studies – insect neurotoxins called neonicotinoids – are applied to seeds and flow through the plants’ whole system. The environmental advantage of this is it reduces pesticide spraying but chemicals end up in the nectar and pollen on which bees feed. Goulson’s group studied an extremely widely used type called imidacloprid, primarily manufactured by Bayer CropScience, and registered for use on over 140 crops in 120 countries.

Bumblebees were fed the toxin at the same level found in treated rape plants and found that these colonies were about 10% smaller than those not exposed to the insecticide. Most strikingly, the exposed colonies lost almost all of their ability to produce queens, which are the only bee to survive the winter and establish new colonies. “There was a staggering magnitude of effect,” said Goulson. “This is likely to have a substantial population-level impact.”

The French team analysed the effect on honey bees of a new generation neonicotinoid, called thiamethoxam and manufactured by Syngenta. They fitted tiny electronic tags to over 650 bees and monitored their activity around the hive. Those exposed to “commonly encountered” levels of thiamethoxam suffered high mortality, with up to a third of the bees failing to return. “They disappeared in much higher numbers than expected,” said Henry. Previous scientific work has shown insect neurotoxins may cause memory, learning, and navigation problems in bees.

A spokesman for Syngenta said: “Although we take good research very seriously, over the last four years, independent authorities in France have closely monitored the use of Cruiser – the product containing thiamethoxam – on more than 1.9m hectares. When properly used no cases of bee mortality have been recorded.”

Julian Little, spokesman for Bayer Cropscience, criticised Goulson’s study because the bees were exposed to imidacloprid in the labaratory, before being placed outside in a natural field environment to feed. “All studies looking at the interaction of bees and pesticides must be done in a full field situation,” he said. “This study does not demonstrate that current agricultural practices damage bee colonies.”

Goulson dismissed as “nonsense” Little’s suggestion that the doses given to the bees were higher than in reality. Both Bayer and Defra suggested other field studies had shown no harmful effects to bees. Goulson said: “If they have done these studies, where are they? They are not in the public domain and therefore cannot be scrutinised. That raises the question of just how good they are.”

From The Guardian: http://www.guardian.co.uk/environment/2012/mar/29/crop-pesticides-honeybee-decline

Monsanto and Dow Chemical trying to bring Agent Orange ingredient back home to American fields

By Richard Schiffman, TruthOut

In a match that some would say was made in hell, the nation’s two leading producers of agrochemicals have joined forces in a partnership to reintroduce the use of the herbicide 2,4-D, one half of the infamous defoliant Agent Orange, which was used by American forces to clear jungle during the Vietnam War. These two biotech giants have developed a weed management program that, if successful, would go a long way toward a predicted doubling of harmful herbicide use in America’s corn belt during the next decade.

The problem for corn farmers is that “superweeds” have been developing resistance to America’s best-selling herbicide Roundup, which is being sprayed on millions of acres in the Midwest and elsewhere. Dow Agrosciences has developed a strain of corn that it says will solve the problem. The new genetically modified variety can tolerate 2,4-D, which will kill off the Roundup-resistant weeds, but leave the corn standing. Farmers who opt into this system will be required to double-dose their fields with a deadly cocktail of Roundup plus 2,4-D, both of which are manufactured by Monsanto.

But this plan has alarmed environmentalists and also many farmers, who are reluctant to reintroduce a chemical whose toxicity has been well established. The use of 2,4-D is banned in several European countries and provinces of Canada. The substance is a suspected carcinogen, which has been shown to double the incidence of birth defects in the children of pesticide applicators in a study conducted by University of Minnesota pathologist Vincent Garry.

Researchers say that the effect of 2,4-D on human health is still not fully understood. But it may be a risk factor for conditions like Hodgkin’s lymphoma, non-Hodgkin’s lymphoma and certain leukemias, which were often found in Vietnam veterans exposed to Agent Orange. The Environmental Protection Agency (EPA) has stated that the chemical could have “endocrine disruption potential” and interfere with the human hormonal system. It may prove toxic to honeybees, birds and fish, according to research conducted by the US Forest Service and others. In 2004, a coalition of groups spearheaded by the Natural Resources Defense Council and the Pesticide Action Network, wrote a letter to the EPA taking it to task for underestimating the health and environmental impacts of 2,4-D.

Large-scale industrial farming has grown dependent on ever-increasing applications of agrochemicals. Some have compared this to a drug addict who requires larger and larger fixes to stay high. Herbicide use has increased steadily over time as weeds develop resistance and need to be doused with more and deadlier chemicals to kill them. This, in turn. requires more aggressive genetic engineering of crops that can withstand the escalating chemical assault.

Many agricultural scientists warn that this growing addiction to agrochemicals is unsustainable in the long run. The fertility of the soil decreases as earthworms and vital microorganisms are killed off by pesticides and herbicides. They also pollute the groundwater and compromise the health of farm animals that are fed with the chemical-infused grain.

These impacts are poised to grow. US Department of Agriculture (USDA) figures reveal that herbicide use rose by 383 million pounds from 1996 to 2008. Significantly, nearly half of this increase (46 percent) took place between 2007 and 2008 as a result of the hawking of new herbicide-resistant crops like the new corn hybrid developed by Dow.

Nobody knows what effect introducing this hybrid would have on the health of American consumers. Corn laced with high levels of 2,4-D could taint everything from breakfast cereals to the beef of cattle, which concentrate the toxin in their flesh. Given that corn and high-fructose corn syrup are key elements in so many processed foods, some public health experts warn that all Americans will soon be guinea pigs in an ill-conceived mass experiment with one of the staples of our food supply. America’s agriculture department, the USDA is considering deregulating Monsanto’s new genetically modified corn variety (the one which will be used in conjunction with the 2,4-D) and is accepting final public comments on the matter until the 27th of this month.

Until recently, herbicide-resistant crops were popular with farmers who benefited from higher yields and nearly effortless management of weeds. But now that the weed problem is coming back with a vengeance, some are reconsidering the wisdom of this chemical-intensive mode of farming. Dow biotech corn costs nearly three times more than conventional seed. And the projected doubling of pesticide use in the years ahead will be expensive, as well as destructive to farmland and ecosystems.

There are viable alternatives to chemical-intensive farming, time-tested methods like crop rotation, use of cover crops, and other practices which allow farmers to compete naturally with weeds. The time has come for farmers to revive the knowledge of their ancestors in this regard.

Some agricultural scientists advocate developing a system of integrated weed management to replace the unsustainable use of chemicals. But the big agrochemical companies have no interest in supporting the sustainable agriculture that would put them out of business. So long as there are billions of dollars to be made in selling herbicide and herbicide-resistant genetically modified seed, there won’t be much research money available to explore the natural alternatives to the destruction of our nation’s heartland.

From TruthOut:

Monsanto guilty of chemical poisoning, rules French court

By Reuters

A French court on Monday declared U.S. biotech giant Monsanto guilty of chemical poisoning of a French farmer, a judgment that could lend weight to other health claims against pesticides.

In the first such case heard in court in France, grain grower Paul Francois, 47, says he suffered neurological problems including memory loss, headaches and stammering after inhaling Monsanto’s Lasso weedkiller in 2004.

He blames the agri-business giant for not providing adequate warnings on the product label.

The ruling was given by a court in Lyon, southeast France, which ordered an expert opinion of Francois’s losses to establish the amount of damages.

“It is a historic decision in so far as it is the first time that a (pesticide) maker is found guilty of such a poisoning,” François Lafforgue, Francois’s lawyer, told Reuters.

Monsanto said it was disappointed by the ruling and would examine whether to appeal the judgment.

“Monsanto always considered that there were not sufficient elements to establish a causal relationship between Paul Francois’s symptoms and a potential poisoning,” the company’s lawyer, Jean-Philippe Delsart, said.

Previous health claims from farmers have foundered because of the difficulty of establishing clear links between illnesses and exposure to pesticides.

Francois and other farmers suffering from illness set up an association last year to make a case that their health problems should be linked to their use of crop protection products.

The agricultural branch of the French social security system says that since 1996, it has gathered farmers’ reports of sickness potentially related to pesticides, with about 200 alerts a year.

But only about 47 cases have been recognised as due to pesticides in the past 10 years. Francois, who suffers from neurological problems, obtained work invalidity status only after a court appeal.

Read more from Reuters: http://www.reuters.com/article/2012/02/13/france-pesticides-monsanto-idUSL5E8DD5UG20120213