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Workloads for eight state investigators who determine whether herbicides are applied properly in Iowa have more than doubled the past two years, with no plans in sight for adding staffers. The workload increase — from 110 misuse reports in the 2016 crop year to 249 in the 2018 crop year — coincides with the introduction by agrochemical companies of dicamba-based herbicides to kill weeds in farm fields. In spite of this, the Iowa Department of Agriculture and Land Stewardship Pesticide Bureau has not added staff investigators and completing cases is taking longer, spilling over into the next crop year. Cases taken on in the 2018 crop year, which ran from Oct. 1, 2017, to Sept.