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The authors recommended further study of per-species and per-development-stage chronic toxicity, of environmental glyphosate levels, and ongoing analysis of data relevant to determining what if any role glyphosate might be playing in worldwide amphibian decline, and suggest including amphibians in standardized test batteries.
The group issued a report that stated glyphosate was detected in Germany's 14 most popular beers, ranging from 0.46 to 29.74 micrograms per liter, noting that the German government limit for glyphosate in drinking water is 0.1 microgram per liter. [30]
The lethal dose of different glyphosate-based formulations varies, especially with respect to the surfactants used. Formulations intended for terrestrial use that include the surfactant polyethoxylated tallow amine (POEA) can be more toxic than other formulations for aquatic species.
A 2008–2009 survey of 144 populations of waterhemp in 41 Missouri counties revealed glyphosate resistance in 69%. Weeds from some 500 sites throughout Iowa in 2011 and 2012 revealed glyphosate resistance in approximately 64% of waterhemp samples. As of 2023, 58 weed species have developed glyphosate resistance. [70]
View a map showing by state the exposure to herbicides containing glyphosate sprayed on nearly half of all corn and soybeans grown in the U.S. A potentially cancer-causing chemical is used on U.S ...
Oral lethal dose (mg/kg) Listed chemicals Red label Extremely toxic 1–50 Monocrotophos, zinc phosphide, ethyl mercury acetate, and others. Yellow label Highly toxic 51–500 Endosulfan, carbaryl, [2] quinalphos, [2] and others. Blue label Moderately toxic 501–5000 Malathion, thiram, glyphosate, [2] and others. Green label Slightly toxic > 5000