The weedkiller dicamba has created a divide between people who work the land in Arkansas.  In a new episode from the award-winning program Us & Them (from PRX & West Virginia Public Broadcasting), their team follows up on a story that’s gotten ugly over the past few years. A newer version of the herbicide is designed to give soybean farmers a way to combat pigweed, a tenacious plant that can take over soybean fields. However, there's evidence that the chemical can evaporate from where it was sprayed and move to harm other plants. It’s become so controversial that some farmers and backyard gardeners are afraid to complain about crop or plant damage. On the other side of the debate, farmers who want to use the herbicide have gone to court and challenged who gets to make the rules about pesticide use in the state. Rural farm communities are typically tight-knit and if one farmer has a problem with another, they meet at what is called the “turn row'' to talk things out. But that’s not what's happening in Arkansas. The atmosphere has gotten just plain un-neighborly.