It’s not the chemicals. The threat to frogs from chemical use is just not there, says this latest. Researchers had refused to publish inconvenient data:
A UC Berkeley scientist sat on data for years
[…] So all the while a public policy debate raged that held the fate of an entire industry in limbo, these researchers just sat on their data and continued to falsely insinuate that atrazine played a key role in “global amphibian declines.”
I had a lengthy email exchange with Dr. Hayes back in January of 2005, just as this controversy started raging. My key question over the course of nearly a dozen emails was the relevance of his lab observations to wild frogs. Hayes blustered his way around the question, hiding behind the “it’s complex” excuse and abruptly ending our exchange.