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Forecasters warn of grasshopper swarms in eastern Montana

 Plant Protection and Quarantine 2024 Rangeland Grasshopper Hazard forecast map.
USDA
Plant Protection and Quarantine 2024 Rangeland Grasshopper Hazard forecast map.

Montana is forecast to be the hot spot in the United States for grasshoppers this summer. The big bugs can eat as much as their bodyweight every day and can destroy even more by toppling plants as they chew through them.

The U.S. Department of Agriculture forecasts swarms of grasshoppers to hatch east of the Continental Divide. Gary Adams with the USDA encouraged farmers and ranchers on a call Monday to prepare.

“Right now there’s no indication on any of these weather patterns I’ve seen right now, including cold weather, that indicates that's going to be sufficient to turn the tide on some of these grasshopper populations,” Adams said.

Thirty pounds of grasshoppers can eat as much vegetation as a 600 pound cow. Between pesticide treatments and revenue losses, grasshoppers cost the U.S. billions of dollars a year to control.

Adams said partial funding for pesticide treatment methods is available through USDA, but it’s limited.

Current warm and dry conditions are ideal for grasshopper growth. Nearly all Montana grasshopper species emerge from their eggs in the spring and can live into late October.

Ellis Juhlin is MTPR's Environmental Reporter. She covers wildlife, natural resources, climate change and agriculture stories. She worked at Utah Public Radio and Yellowstone Public Radio prior to joining MTPR, and in wildlife conservation before becoming a journalist. She has a Master's Degree in Ecology from Utah State University and is an average birder who wants you to keep your cat indoors. Her life is run by her two dogs, one of which is afraid of birds.

ellis.juhlin@mso.umt.edu
406-272-2568
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