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WHO cancer unit to analyze 2,4-Dqrcode

Jun. 1, 2015

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Jun. 1, 2015
The World Health Organization(WHO) is set to examine a widely used pesticide and agribusiness is bracing for bad news, less than three months after the group classified another popular herbicide as “probably” cancer-causing.

Twenty-four scientists representing WHO’s International Agency for Research on Cancer (IARC) will analyze scientific findings regarding links between cancer in humans and the herbicide known as 2,4-D at a June 2-9 meeting in Lyon, France.

A separate group of IARC scientists in March unanimously decided to classify glyphosate, the key ingredient in Monsanto’s Roundup herbicide, as “probably carcinogenic to humans.”

The designation prompted outrage and calls for a retraction from Monsanto, and demands by some public officials and consumers for bans on the pesticide.
Many believe the same could happen for 2,4-D.

“I do think they are going to upgrade 2,4-D,” said Michael Hansen, a senior scientist at Consumers Union who has served on an advisory committee of the U.S. Department of Agriculture as well as an expert on WHO consultation projects.

“There is just as strong, or even a stronger case (for links to cancer), on 2,4-D than there was for glyphosate,” he said.

IARC’s work is of particular concern to Dow AgroSciences. The company manufactures 2,4-D and this year is rolling out a product that combines 2,4-D with glyphosate after approval from the Environmental Protection Agency last year.

Dow will have representatives at the meeting, and a 2,4-D task force backed by Dow funded an analysis of 14 studies that refutes concerns about 2,4-D and cancer that has been submitted to IARC.
“The epidemiology evidence does not support an association between 2,4-D and NHL (non-Hodgkin lymphoma), gastric cancer, or prostate cancer risk,” said Julie Goodman, a scientist and consultant working for the 2,4-D task force.

However, a different analysis of scientific studies did find cancer connections with 2,4-D, said IARC scientist Maria Leon, who co-authored that analysis last year.

There were indications that farm exposure to 2,4-D was associated with a 40 per cent higher risk of NHL. Determining the strength of the evidence will be up to the IARC working group, Leon said.

Maarten Bosland, a U.S. cancer scientist and member of the IARC group evaluating 2,4-D, said he knows the work will be closely watched.

“There is nothing that anybody can say at this point. We haven’t seen all the evidence,” Bosland said.

Critics for years have said 2,4-D has clear ties to cancer and noted it was an ingredient in Agent Orange, a defoliant used in the Vietnam War linked to cancers in soldiers. But agribusinesses, U.S. regulators and others say a different ingredient in Agent Orange was behind the health problems, and that there is no solid evidence of cancer connected to 2,4-D.

Dow said “no national regulatory authority in the world considers 2,4-D a carcinogen.”

A coalition of U.S. farmer and environmental groups have sued the EPA, seeking to overturn approval for Dow’s new herbicide.

Source: Reuters

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