Arizona Cotton Fields (IMAGE) University of Arizona Caption Cotton fields in Parker Valley, Ariz. Bt cotton is the greener field in the foreground. The whiter swath of cotton in the background is a refuge field of non-Bt cotton. Credit Timothy Dennehy Usage Restrictions This photo may only be used in conjunction with an article about the research described in this release. Photo credit must be given as stated. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.