Mealey's (February 25, 2019, 2:10 PM EST) -- SAN FRANCISCO — A federal judge in California on Feb. 24 issued a ruling on expert testimony pertaining to the three bellwether plaintiffs with trials pending against Monsanto Co. for allegations that glyphosate, the active ingredient in the company’s herbicide Roundup, causes cancer, in which he said the experts could testify regarding causation. The ruling applies to all of the cases in the multidistrict litigation for Roundup products liability (In re: Roundup Products Liability Litigation, MDL No. 2741, N.D. Calif.)....