Pesticide Broadcast (Newsletter)

Stephen J. Toth, Jr., Pest Management Information Specialist
Wayne G. Buhler, Pesticide Education Specialist

Volume 17, Number 7, October 12, 2007

EPA Issues One-Year Registration for Soil Fumigant Iodomethane

EPA has approved a one-year registration of iodomethane (methyl iodide) under highly restrictive provisions governing its use. Iodomethane can serve as an alternative to ozone-depleting pesticide methyl bromide. The risk assessment process for iodomethane has been one of the most thorough analyses ever conducted on a new pesticide. It has incorporated state-of-the-art methods and extensive chemical-specific toxicology and exposure data. The agency's assessment carefully evaluated the potential for cancer and special sensitivities to the most vulnerable populations. The agency also paid particular attention to potential exposures of those who live, work, or spend time in areas near fields where iodomethane might be used.

The risk-assessment techniques, protocols governing generation of toxicology studies, and exposure evaluation methods used to support the evaluation of iodomethane have been peer-reviewed by agency scientists, the independent Scientific Advisory Panel or both. By using a thorough evaluation process the agency concluded that there are adequate safety margins and the registration of iodomethane does not pose significant risks.

On September 25, EPA received a letter signed by 54 scientists who oppose the registration of iodomethane as a soil fumigant, citing potential human health and environmental concerns, and requested additional peer review. EPA has discussed our assessment with some of the signatories and sent a letter to inform the scientists of the rigorous science used to support EPA's decision.

Iodomethane can be used as a pre-plant soil fumigant to control plant pathogens, nematodes, insects, and weeds on strawberries, tomatoes, peppers, ornamentals, turf, trees, and vines. More information on iodomethane is available on EPA's Web site at http://www.epa.gov/pesticides/factsheets/iodomethane_fs.htm.

Source: U. S. Environmental Protection Agency's Office of Pesticide Programs, EPA Pesticide Program Update, October 5, 2007

Recommendations for the use of chemicals are included in this publication as a covenience to the reader. The use of brand names and any mention or listing of commercial products or services in this publication does not imply endorsement by the North Carolina Cooperative Extension Service nor discrimination against similar products or services not mentioned. Individuals who use chemicals are responsible for ensuring that the intended use complies with current regulations and conforms to the product label. Be sure to obtain current information about usage and examine a current product label before applying any chemical. For assistance, contact an agent of the North Carolina Cooperative Extension Service in your county.

Employment and program opportunities are offered to all people regardless of race, color, national origin, sex, age or disability. North Carolina State University, North Carolina A&T State University, U.S. Department of Agriculture, and local governments cooperating.

Last modified on October 12, 2007 by Stephen J. Toth, Jr.