The burden of proof: A response to Rosi-Marshall et al.

Abstract

To the Editor: A recent paper in PNAS (1) purports to show that insect-resistant crops have unexpected effects on nontarget insects in streams. A sentence in the Abstract reads “Stream insects are important prey for aquatic and riparian predators, and widespread planting of Bt crops has unexpected ecosystem-scale consequences.” The data presented in … †To whom correspondence should be addressed. E-mail: rnbeachy{at}danforthcenter.org