Dicamba resistance in pigweed selected in research greenhouse, not in the field

Thursday, January 28, 2016

NEWPORT, Ark. – University of Arkansas System Division of Agriculture researchers have selected for dicamba-resistant pigweed, documenting how genetic resistance develops and how the industry must work to protect the few remaining weed-fighting options. 

Bob Scott, an extension weed scientist, emphasized that the finding was the result of controlled greenhouse studies and not a confirmation of anything found in any field. 

Pigweed in Soybean

PIGWEED  -- Pigweed pokes its head above a soybean field in this 2009 file photo. (UofA System Division of Agriculture image)  

“Through experimentation in the greenhouse, we selected for a population of pigweed that is tolerant to the herbicide dicamba at a field rate,” Scott said Monday. “This pigweed population was not found to be resistant to dicamba in nature or in any field.”


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