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University of Iowa News Release

April 14, 2005

Health Effects Of Atrazine Topic Of April 24 Lecture

The University of Iowa Center for Health Effects of Environmental Contamination (CHEEC) will host a public lecture on the herbicide atrazine April 24 on the UI campus.

Tyrone Hayes, Ph.D., professor of developmental endocrinology at the University of California-Berkeley, will present, "Atrazine Impacts on Human Health and Wildlife: A Public Forum" from 3 to 5 p.m. Sunday, April 24, in the Richey Ballroom at the Iowa Memorial Union. The event is free and open to the public.

Atrazine is one of the most commonly used herbicides in the United States. In the Midwest, typically it is applied to cornfields before planting to control broadleaf weeds and some grassy weeds. First approved as an herbicide in the United States in 1958, atrazine is sold on its own or as an ingredient in other products.

Hayes has conducted research studies showing that atrazine inhibits development in frogs and that even low doses of atrazine feminizes male frogs by altering the testes so they will produce eggs.

Hayes will be featured on the PBS program, "National Geographic's Strange Days on Planet Earth," schedule for broadcast at 8 p.m. April 27. Details are available online at

For more information on Hayes' April 24 lecture, contact David Riley at CHEEC at 319-335-4550 or by e-mail at

STORY SOURCE: University of Iowa Health Science Relations, 5139 Westlawn, Iowa City, Iowa 52242-1178

MEDIA CONTACT: David Pedersen, (319) 335-8032,