Farmers say they are losing their battle with weeds at a time when growers are grappling with inflation and extreme weather linked to climate change. Crop-killing weeds such as kochia are advancing across the U.S. northern plains and Midwest, in the latest sign that weeds are developing resistance to chemicals faster than companies including Bayer and Corteva can develop new ones to fight them. In many cases weeds are developing resistance against multiple herbicides, scientists said. Read the Reuters report here. Read an earlier post by the HHRA board chair on the problem of resistant weeds here.