AGRO 44-LC-MS-MS analysis of imidacloprid and metabolites in hemlock trees

Imidacloprid is a neonicotinic insecticide used worldwide against hemipteran insects. In collaboration with the USFS, research is aimed at controlling the hemlock woolly adelgid (Adelges tsugae) on eastern hemlock (Tsuga canadensis). A LC-MS-MS method was developed to provide unambiguous identificat...

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Journal Title: Abstracts of Papers of the American Chemical Society Vol. 234; pp. 44-AGRO -
Authors: Anthony Lagalante, Frank B. Cook
Format: Article
Published: 08/19/2007
Summary: Imidacloprid is a neonicotinic insecticide used worldwide against hemipteran insects. In collaboration with the USFS, research is aimed at controlling the hemlock woolly adelgid (Adelges tsugae) on eastern hemlock (Tsuga canadensis). A LC-MS-MS method was developed to provide unambiguous identification and quantification of imidacloprid and eight metabolites in hemlock foliage and xylem fluid exudates at the low ppb levels. Results will be presented in conjunction with previous analysis of imidacloprid levels in treated trees using a commercial ELISA test kit to assess the over prediction of imidacloprid levels due to cross reactivities. The measurement of individual metabolites spatially and temporally in treated hemlock will enable understanding of the biological transformations and effective residue levels for reapplication intervals.
ISSN: 0065-7727