Amphibians
A growing body of research conducted by independent labs across the world is showing that atrazine has no effect on amphibian development.
Advancing Frog Research
In the quest to discover more about how atrazine might interact with frogs, Syngenta has taken research with the species Xenopus laevis (also known as the African clawed frog, a common test species) to a higher plane. Through carefully audited and controlled lab experiments unlike any conducted before, we've learned that atrazine, even at the slightest levels sometimes found in water, has no effect on the normal development of frogs.
Click here to learn more about this work and that of other researchers.

Factors in Amphibian Survival
A number of factors are believed to be involved in amphibian survival-disease, habitat destruction and modification, exploitation, pollution, pesticide use, introduced species, climate change and increased ultraviolet-B radiation (UV-B). But perhaps most critical has been the devastating effect of chytrid fungus.

"While many factors have been cited for the profound change in global amphibian populations, a new emerging infectious disease, chytridiomycosis, is thought to be directly responsible for wiping out more than 200 species. It poses the greatest threat to biodiversity of any known disease. An aquatic fungus of unknown origin, it's the first of its kind to infect vertebrates, and only amphibians." http://www.sciencedaily.com/releases/2008/08/080811195627.htm

EPA-required research shows safety to frogs
The latest, cutting-edge research shows that atrazine is safe for frogs. After reviewing extensive research on amphibians and atrazine, EPA said, "the data are sufficiently robust to outweigh previous efforts to study the potential effects of atrazine on amphibian gonadal development" and "there is no compelling reason to pursue additional testing."
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Ethics Concerns Surrounding Opponents to Atrazine
In addition to the questions about Dr. Hayes' methodology and findings related to atrazine that have been raised by scientists and regulators, his professional behavior has also been called into question.
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Expert View
"EPA has taken an especially close look at the research conducted by Dr. Tyrone Hayes which reports that atrazine adversely affects sexual development in frogs, causing a mixture of sex organs in a single animal. EPA has concluded that the existing data are insufficient to demonstrate that atrazine causes such effects. The Agency's conclusions are supported by the independent, expert peer review of the SAP (Science Advisory Panel)."

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