Pendleton: The Umatilla National Forest will soon begin an integrated approach of prevention, manual, mechanical, herbicide, biological control and cultural treatments to reduce the risk of invasive species expanding on the forest. This work will be implemented under the 2010 decision for the Invasive Species Treatment Project and the Forest Plan amended by the Pacific Northwest Region 2005 decision for Preventing and Managing Invasive Plants.
Treatment on the forest is scheduled to begin in late April and is expected to continue through October. “The majority of herbicide treatments will be spot application to individual invasive plants using truck sprayers, backpack sprayers and UTVs,” said Joan Frazee, Forest Botanist. Some broadcast application is also planned along a small subset of roadsides.
Herbicides to be used include clopyralid, picloram, glyphosate, metsulfuron methyl, imazapic and chlorsulfuron. “Manual and mechanical treatments are planned for a number of small infestations, some of which have been treated for over a decade and are subsequently much reduced in size,” noted Frazee. Herbicide treatments will be carried out following the project design features of the Record of Decision for the Invasive Plants Treatment Project.
Invasive species have been shown to reduce biodiversity including wildlife habitat, wildlife and domestic livestock forage and streamside vegetation. Invasive plants targeted for treatment include common crupina, yellow starthistle, leafy spurge, spotted and diffuse knapweed, medusahead, rush skeleton weed, meadow hawkweed, Scotch thistle, sulphur cinquefoil, dalmation toadflax, and houndstongue.
Partners include County weed boards in Oregon and Washington, Oregon Department of Fish and Wildlife, Washington Department of Fish and Wildlife, Wallowa Resources, Tri-County Cooperative Weed Management Area, City of Ukiah, City of Granite, North Fork John Day Watershed Council, Oregon Department of Agriculture, Rocky Mountain Elk Foundation, Blue Mountain Elk Initiative, private landowners and ranchers. Funding includes appropriated dollars and grant money from the Rocky Mountain Elk Foundation and Challenge Cost Share projects.
Treatment sites are located across the Umatilla National Forest and herbicide treatments will be signed at the time of treatment. Maps of the proposed treatment sites are also posted on the forest’s website at: www.fs.usda.gov/umatilla/.
For more specific information on timing and location of herbicide treatments, please contact the local Ranger District Office coordinators:
- Heppner Ranger District, Tim Collins - (541) 676-2114;
- North Fork John Day Ranger District, Tom Thompson/Brad Lathrop - (541) 427-5365
- Pomeroy Ranger District, Blaine Beehler - (509) 843-4663
- Walla Walla Ranger District, Eric Pfeifer - (509) 522-6022
For additional information contact Joan Frazee at (541) 278-3931.