Iowa farmers know Palmer amaranth, the aggressive "super weed" that can quickly overtake their valuable corn and soybean fields, is lurking in thousands of conservation acres.

 

In the weeks and months ahead, growers across the state will fight to keep the money-robbing pigweed from marching into millions of Iowa's crop acres.

 

Last year, farmers discovered that Palmer amaranth seed had been inadvertently mixed into pollinator and other conservation reserve program plantings.

 

Now, 49 of Iowa's 99 counties have reported seeing the weed, although officials believe it's more pervasive and has invaded more counties.

 

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