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Variation in amphibian response to two formulations of glyphosate‐based herbicides
Author(s) -
Edge Christopher,
Gahl Meghan,
Thompson Dean,
Hao Chunyan,
Houlahan Jeff
Publication year - 2014
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.2723
Subject(s) - lithobates , glyphosate , biology , toxicity , amphibian , weed , larva , pesticide , toxicology , ecotoxicology , weed control , botany , agronomy , ecology , chemistry , organic chemistry
Variation in toxicity among formulations and species makes it difficult to extrapolate results to all species and all formulations of herbicides. The authors exposed larval wood frogs ( Lithobates sylvaticus ) from 4 populations to 2 glyphosate‐based herbicides, Roundup Weed and Grass Control® and Roundup WeatherMax®. The 96‐h median lethal concentration values for both formulations varied among the populations (Roundup Weed and Grass Control, 0.14 mg acid equivalents (a.e.)/L to 1.10 mg a.e./L; Roundup WeatherMax, 4.94 mg a.e./L to 8.26 mg a.e./L), demonstrating that toxicity varies among the formulations and that susceptibility may differ among populations. Environ Toxicol Chem 2014;33:2628–2632 . © 2014 SETAC