Stanley Staats walks Dec, 3 at his farm in rural Wapello. Staats has filed several complaints about dicamba damage with the Iowa Department of Agriculture and Land Stewardship. The state fined a local elevator $1,000 for dicamba damage to Staats’ chestnut trees. His was the only complaint filed in 2018 that led to a fine. (Rebecca F. Miller/The Gazette) Stanley Staats works Dec. 3 on his computer in his home in rural Wapello. Continued drift of weedkillers, including dicamba and glyphosate, has killed dozens of trees in the 700-tree chestnut grove he planted 30 years ago. (Rebecca F. Miller/The Gazette) Trees show damage to their branches in a grove at a chestnut farm belonging to Stanley Staats in rural Wapello. (Rebecca F. Miller/The Gazette)