(February 19, 2019, 1:21 PM EST) -- SAN FRANCISCO — A federal judge in California on Feb. 18 ruled that the plaintiffs in lawsuits against Monsanto Co. alleging that they developed cancer as a result of exposure to glyphosate, the active ingredient in the herbicide Roundup, may not introduce a report from the International Agency for Research on Cancer (IARC) as evidence in Phase 1 of their trial, which focuses solely on the issue of causation (In re: Roundup Products Liability Litigation, MDL No. 2741, N.D. Calif.)....