Italian Arum (Arum italicum) on Apr 5, 2017
Submitter does not have a specimen
EDRR Status: Local expert notified
Description of specimen
see images
Commentary
Expert Reviewer
Samuel Leininger
Clackamas Soil and Water Conservation District
4-County Cooperative Weed Management Area
Columbia Gorge Cooperative Weed Management Area
The photos you submitted do indeed appear to be Italian arum (arum italicum). Although, not a state listed noxious weed in Oregon, this invasive weed is problematic and very difficult to control once established.
Because this is not a state listed noxious weed, there is very little control information available. That said there is some preliminary information out of Washington state were it has been listed. In general recommendations are related to manual removal, but that is really only feasible for smaller infestations. We currently have few viable tools for controlling large-scale infestations.
I encourage you to review the following links for additional information regarding control. If you have additional questions I encourage you to contact me directly.
http://extension.wsu.edu/sanjuan/wp-content/uploads/sites/9/2014/04/Italian-Arum-brochure.pdf
http://co.whatcom.wa.us/DocumentCenter/Home/View/27070
I applaud your efforts in controlling this plant, and we will do what we can to help with this process.
Sam
______________________________________
Samuel Leininger
WeedWise Program Manager
Clackamas Soil & Water Conservation District
221 Molalla Ave. Suite 102
Oregon City, OR 97045
503-210-6006
sleininger@conservationdistrict.org
weedwise.conservationdistrict.org
______________________________________
Samuel Leininger
April 6, 2017, 10:38 a.m.