Acknowledgements
- Farm-scale evaluation of the impacts of transgenic cotton on biodiversity, pesticide use, and yield

A. Ali, K. Dell, G. Fugate, J. Harms, and D. Overton provided field and laboratory assistance. S. Cover, J. Ellington, and D. Wheeler helped with specimen identification. M. Sisterson, B. Tabashnik, and K. Walker provided comments on the manuscript. Environmental Protection Agency Cooperative Agreement X-82974701-O provided support for this study.

Footnotes

Abbreviations: Bt, Bacillus thuringiensis; BtHr, Bt protein and herbicide resistance; nonTr, nontransgenic; IGR, insect growth regulator; ha, hectare; NDVI, Normalized Difference Vegetation Index.

^||To whom correspondence should be addressed. E-mail: ycarrier@ag.arizona.edu

Freely available online through the PNAS open access option.

Author contributions: B.J.O., S.E.M., and Y.C. designed research; M.G.C., C.Y., C.S., C.-y.H., M.R., C.O., C.E.-K., L.A., and Y.C. performed research; M.G.C., C.-y.H., M.R., C.E.-K., B.J.O., S.E.M., P.D., and Y.C. analyzed data; and Y.C. wrote the paper.

Conflict of interest statement: No conflicts declared.

This paper was submitted directly (Track II) to the PNAS office.