Oregon Invasive Species Hotline

Review Report

Managed by Tania Siemens

Hotline Report: Submitted on Wednesday, September 17 2008

Category: Land Plants

Species (Confirmed): Starthistle, Yellow

Severity: invasive

EDRR Status: 1. Local expert notified

Description of specimen:

Submitter does not have sample

Region: Wheeler

Description of area where specimen was found:

Big Bend area of John Day River canyon just upriver from 3 canyons area ((Rhodes Canyon, Rattlesnake Canyon, Amine Canyon come together on east bank), long sandy river bar and heavily used BLM designated camp. We pulled a large garbage bag full of thistle, packed it out and put in garbage collection at home (Eugene). Also pulled a pile in small wash area at the downriver end of the camp bar, left it under heavy rocks and sticks for later removal. This was July 10-12, 2008. No doubt it is yellow starthistle. When it dried its needles were so hard and sharp they poked through the bag we collected. Quite a bit of it in sandy washes and bars at this site. Call us for more info: Tim Clancey 541-683-4205

Response History

Hotline manager: Tania Siemens - Sunday, October 5 2008 at 11:58am

Hi Tim,

Thanks for your report and the great work controlling yellow starthistle in the John Day River. I will forward your report to Thom Bruce, Weed Control Officer at the Wheeler County Weed Department. Based on weedmapper (www.weedmapper.org), it looks as if the John Day river has quite a bit of yellow starthistle. Thanks again for helping prevent its further spread by controlling and reporting it. Keep up the great work!

It looks like you are from Eugene. If so, you may be interested in the new early detection program in the Eugene area called WEEDIN: West Eugene Early Detection of Invasives Network. Check out their website (http://www.wewetlands.org/willamettesleastwanted.asp) for a list of species you can be looking for and reporting in the Upper Willamette Valley. (Yellowstarthisle is on the list.)

Thanks again for your report!

Tania Siemens
The Nature Conservancy/OSU Sea Grant
tania.siemens@oregonstate.edu

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