Opposition from France and Italy doomed a European Union vote on Thursday to reauthorize the world's most popular weedkiller, glyphosate, a decision that came hours after Arkansas regulators moved to ban an alternative weedkiller for much of 2018. The decisions are a double blow to the agrochemical industry and particularly to the chemicals giant Monsanto. The effort to reauthorize the weedkiller failed to receive a majority even though regulators were seeking only a five-year reauthorization instead of the typical 15, amid controversy and disputes about cancer risk that have made glyphosate's future in Europe uncertain. Its approval in the region expires in mid-December. In Arkansas, regulators voted on Wednesday to ban the use of another major weedkiller, dicamba ... amid widespread reports of crop damage. Dicamba has been around for decades, but new versions have been developed by Monsanto, BASF and DuPont as an alternative to Roundup. Taken together, the decisions reflect an increasing political resistance to pesticides in Europe and parts of the United States, as well as the specific shortcomings of dicamba. Dicamba has damaged more than 3.6 million acres of soybean crops in 25 states. The European Union's decision followed years of haggling and delay. But glyphosate ... has been plunged into controversy since the International Agency for Research on Cancer, part of the World Health Organization, declared it a probable carcinogen in 2015.