Discovery and Characterization of Sulfoxaflor, a Novel Insecticide Targeting Sap-Feeding Pests
2011
Zhu, Yuanming | Loso, Michael R. | Watson, Gerald B. | Sparks, Thomas C. | Rogers, Richard B. | Huang, Jim X. | Gerwick, B Clifford | Babcock, Jonathan M. | Kelley, Donald | Hegde, Vidyadhar B. | Nugent, Benjamin M. | Renga, James M. | Denholm, Ian | Gorman, Kevin | DeBoer, Gerrit J. | Hasler, James
The discovery of sulfoxaflor [N-[methyloxido[1-[6-(trifluoromethyl)-3-pyridinyl]ethyl]-λ4-sulfanylidene] cyanamide] resulted from an investigation of the sulfoximine functional group as a novel bioactive scaffold for insecticidal activity and a subsequent extensive structure−activity relationship study. Sulfoxaflor, the first product from this new class (the sulfoximines) of insect control agents, exhibits broad-spectrum efficacy against many sap-feeding insect pests, including aphids, whiteflies, hoppers, and Lygus, with levels of activity that are comparable to those of other classes of insecticides targeting sap-feeding insects, including the neonicotinoids. However, no cross-resistance has been observed between sulfoxaflor and neonicotinoids such as imidacloprid, apparently the result of differences in susceptibility to oxidative metabolism. Available data are consistent with sulfoxaflor acting via the insect nicotinic receptor in a complex manner. These observations reflect the unique structure of the sulfoximines compared with neonicotinoids.
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