An Arkansas panel has adopted a plan to allow restricted use of an herbicide banned in the wake of complaints that it drifted onto crops and caused damage. The Arkansas Plant Board voted after a 9½-hour public hearing to allow the use of dicamba through May 25. The new restrictions also would impose a half-mile buffer zone around research stations, organic crops, specialty crops, non-tolerant dicamba crops and other sensitive crops. The rules now go to lawmakers for approval.The state had previously banned dicamba's use from April 16 through Oct. 31.