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A new study in the Journal of Applied Technology found commonly used herbicides like Monsanto’s Roundup that contain glyphosate also contain undisclosed, "inert" ingredients not subjected to mandatory EPA testing.


Commonly used herbicides across the U.S. contain highly toxic undisclosed “inert” ingredients that are lethal to bumblebees, according to a new study published April 16, in the Journal of Applied Ecology.


The study reviewed several herbicide products and found that most contained glyphosate, an ingredient best recognized from Roundup products and the most widely used herbicide in the U.S. and worldwide.


While the devastating impacts of glyphosate on bee populations are more broadly recognized, the toxicity levels of inert ingredients are less understood because they are not subjected to the same mandatory testing by the Environmental Protection Agency (EPA).