If you don’t think herbicide-resistant weeds will ever threaten your fields, Tennessee farmers will tell you 120 million reasons why you should care.

Larry Steckel, University of Tennessee Extension weeds specialist, pegged the impact that glyphosate-resistant weeds have upon Tennessee soybean production at $120 million annually. He reported these calculations at presentations he made at Bayer CropScience and BASF media events at this week’s Commodity Classic in Nashville, Tennessee.

Here’s the breakdown:

·      Herbicide costs have increased $72,000,000. That’s based on $45 per acre across 1.6 million soybean acres.