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"In this case, Monsanto denied requests by university researchers to study its XtendiMax with VaporGrip for volatility - a measure of its tendency to vaporize and drift across fields.

The researchers interviewed by Reuters - Jason Norsworthy at the University of Arkansas, Kevin Bradley at the University of Missouri and Aaron Hager at the University of Illinois - said Monsanto provided samples of XtendiMax before it was approved by the EPA. However, the samples came with contracts that explicitly forbade volatility testing."

https://www.reuters.com/article/us-usa-pesticides-dicamba-in...