Study: Roundup And Glyphosate Toxicity Underestimated

Roundup and glyphosate toxicity underestimated – study (GM Watch, July 3, 2013):

NOTE: Below is yet another study throwing into question the reliability of regulatory classifications of glyphosate and Roundup.

The levels of Roundup and glyphosate found in this study to be toxic to Daphnia magna, the water flea, are minuscule and are well within levels expected to be found in the environment.

But glyphosate is classed by regulators as “practically nontoxic” to aquatic invertebrates.

Daphnia magna is a widely accepted model for environmental toxicity.

This study follows an earlier study by some of the same authors which showed that Bt maize fed to daphnia magna reduced their fitness:
http://www.gmwatch.eu/index.php?option=com_content&view=article&id=14943


Clone- and age-dependent toxicity of a glyphosate commercial formulation and its active ingredient in Daphnia magna
Marek Cuhra, Terje Traavik, and Thomas Bøhn
Ecotoxicology. 2013 March; 22(2): 251–262
Open access:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3572389/

Abstract
Low levels of glyphosate based herbicide induced significant negative effects on the aquatic invertebrate Daphnia magna. Glyphosate herbicides such as brands of Roundup, are known to be toxic to daphnids. However, published findings on acute toxicity show significant discrepancies and variation across several orders of magnitude. To test the acute effects of both glyphosate and a commercial formulation of Roundup (hereafter Roundup), we conducted a series of exposure experiments with different clones and age-classes of D. magna. The results demonstrated EC50 (48) values in the low ppm-range for Roundup as well as for the active ingredient (a.i.) isopropylamine salt of glyphosate (glyphosate IPA) alone. Roundup showed slightly lower acute toxicity than glyphosate IPA alone, i.e. EC50 values of 3.7–10.6 mg a.i./l, as compared to 1.4–7.2 mg a.i./l for glyphosate IPA. However, in chronic toxicity tests spanning the whole life-cycle, Roundup was more toxic. D. magna was exposed to sublethal nominal concentrations of 0.05, 0.15, 0.45, 1.35 and 4.05 mg a.i./l for 55 days. Significant reduction of juvenile size was observed even in the lowest test concentrations of 0.05 mg a.i./l, for both glyphosate and Roundup. At 0.45 mg a.i./l, growth, fecundity and abortion rate was affected, but only in animals exposed to Roundup. At 1.35 and 4.05 mg a.i./l of both glyphosate and Roundup, significant negative effects were seen on most tested parameters, including mortality. D. magna was adversely affected by a near 100% abortion rate of eggs and embryonic stages at 1.35 mg a.i./l of Roundup. The results indicate that aquatic invertebrate ecology can be adversely affected by relevant ambient concentrations of this major herbicide. We conclude that glyphosate and Roundup toxicity to aquatic invertebrates have been underestimated and that current European Commission and US EPA toxicity classification of these chemicals need to be revised.

More important information on Monsanto’s Roundup (containing Glyphosate):

GMO And Monsanto Roundup: Glyphosate Weedkiller In Our Food and Water?

Glyphosate In Monsanto’s Roundup Inhibits Natural Detoxification In Human Cells: Study

Study: New Review Of Hundreds Of Scientific Studies Surrounding Glyphosate Links Monsanto’s Roundup To Autism, Parkinson’s And Alzheimer’s

USDA Received Dire Pathogen Warning BEFORE Deregulating GM Alfalfa

Monsanto’s Roundup Herbicide Linked To Overgrowth of Deadly Bacteria

Study: GMO Toxins Found In Nearly All Pregnant Women, Unborn Babies

GMO Technology, Glyphosate Toxicity Leaving Men Sterile

Jeffrey Smith’s Full Presentation On Deadly GMO’s (Video)

FIRST LONG-TERM GMO STUDY: Monsanto GMO Corn & Roundup Cause Massive Tumors In Lab Animals (Video)

Shocking GMO Study: Rats Fed Lifetime Of GM Corn Grow Horrifying Tumors, 70% Of Females Die Early

Study: Roundup Herbicide 450-Fold Diluted Is Still Genotoxic

Illinois Government Secretly Destroys Beekeeper’s Bees And 15 Years Of Research Proving Monsanto’s Roundup Kills Bees

Farmers Sue Monsanto And US Tobacco Giants Knowingly Poisoned Argentinean Tobacco Farmers With Pesticides, Causing ‘Devastating Birth Defects’ In Their Children

Monsanto Secretly Poisoning Population With Roundup – Scientist And Friends Attacked For Exposing Roundup Link To Birth Defects

ROUNDUP: Birth Defects Caused By World’s Top-Selling Weedkiller, Scientists Say

Roundup Birth Defects: Regulators Knew World’s Best-Selling Herbicide Causes Problems, New Report Finds

Scientists Warn Of Dangerous New Pathogen From Roundup Ready Treated Monsanto GM Crops Causing Infertility And Spontaneous Abortions

Roundup, GMOs linked to emergence of deadly new pathogen causing spontaneous abortions among animals

Monsanto’s Roundup Triggers Over 40 Plant Diseases and Endangers Human and Animal Health

Study: Monsanto’s Roundup Kills Human Cells (Flashback)

Scientist: Monsanto’s herbicide could cause brain, intestinal and heart defects in foetuses

4 thoughts on “Study: Roundup And Glyphosate Toxicity Underestimated

  1. When corporations run a country, as they run this one, any corporate lie will be told to the fools who are foolish enough to listen to US media. The rest of us, who know better, do not listen to, or trust US media.

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