Good Afternoon Mr. Herbst,

I want to thank you for reporting this infestation of purple loosestrife. This is a significant invader within Clackamas County. The Clackamas Soil and Water Conservation District is working with regional partners to map and catalog known infestations of loosestrife to help prioritize future control efforts.

Unfortunately, the resources required to control this invader are limited in relation to the overall need. As such we are prioritizing our efforts to maximize our impacts within Clackamas County. Your report will help us to prioritize future treatments. So thank you for taking the time to report this invasive species.

With the current extent of purple loosestrife infestations, our treatments focus primarily on the introduction of biological controls to reduce the impact over time. For isolated patches, we may take more active measures to control this plant. The current extent of purple loosestrife and site characteristics will help determine our course of action.

For more information about purple loosestrife please check out the resources provided below.

http://www.oregon.gov/oda/shared/Documents/Publications/Weeds/PurpleLoosestrifeProfile.pdf

https://www.portlandoregon.gov/bes/article/172628

http://your.kingcounty.gov/dnrp/library/water-and-land/weeds/BMPs/purple_loosestrife-control.pdf

http://www.invasive.org/weedcd/pdfs/tncweeds/lythsal.pdf

Again thank you for reporting this invader. Please feel free to contact me if you have any additional questions. All the best,

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

Samuel Leininger
Aug. 11, 2015, 10:13 a.m.