In February 2010, a Scientific Review Committee commissioned by the California Department of Pesticide Regulation (DPR) concluded that the use of methyl iodide in agriculture would endanger public health:
"Based on the data available, we know that methyl iodide is a highly toxic chemical and we expect that any anticipated scenario for the agricultural or structural fumigation use of this agent would result in exposures to a large number of the public and thus would have a significant adverse impact on the public health. Due to the potent toxicity of methyl iodide, its transport in and ultimate fate in the environment, adequate control of human exposure would be difficult, if not impossible. This is clearly shown in the DPR risk calculations and the evidence of the toxicity of methyl iodide upon which these conclusions are based is compelling. In addition to the evidence for significant toxicity there is a lack of information that adds further uncertainty to the evaluation of the toxicity. We have concluded there is little doubt that the compound possesses significant toxicity."
Susan Kegley, a consulting scientist for Pesticide Action Network, summed it up for the San Francisco Chronicle:
"This stuff just kills everything," said Kegley, a chemist, who pointed out that even low doses have caused neurological damage and fetal death in laboratory animals. "It is a known carcinogen."
Methyl iodide has been linked to thyroid disease, including cancerous tumors that can also affect the lungs and brain, she said. If tarps typically used to cover the treated soil were to blow off, she said, the substance could waft into the air.
"We are likely to see a greater incidence of thyroid disease with use of this chemical," said Kegley, who wears double gloves and uses syringes, a fume hood and ventilation devices whenever she handles the chemical in the lab.
Despite scientist concerns, on April 30, 2010, California proposed using methyl iodide in agriculture.
Take Action by June 29: Call Gov. Schwarzennegger
Methyl iodide is so reliably carcinogenic that it’s used in the lab to cause cancer. Scientists say it "cannot be used safely," yet DPR has proposed approval. We have until the end of June to register public concern. Call the Governor & demand that methyl iodide not be approved: (916) 445-2841
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