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Grasshoppers have been a visible, frustrating pest of rangeland, field crops, and gardens since Oklahoma was first settled. While we do not encounter spectacular, widespread grasshopper outbreaks like those seen in the Great Plains 100 years ago, they occasionally build up in numbers and cause problems over hundreds of thousands of acres of rangeland, pasture, and row-crops in Oklahoma. It is a challenge to manage grasshoppers because it is difficult to predict if, and when, they will become a problem.