ErinFuller Posted September 27, 2016 Report Share Posted September 27, 2016 Last week the SW x SW Corner CISMA coordinated a Japanese Knotweed Symposium, and I wanted to share one of the handouts that we passed out to attendees on JK treatment methods and sprayer calibration. Huge thanks to all that shared their info (Katie Grzesiak, Leslie Kuhn and Ardie Roth) used to create the document, and special thanks to Leslie for a LOT of editing, input and and developing the sprayer calibration methods. Feel free to share! Erin JK treatment methods_sprayer calibration.pdf Quote Link to comment Share on other sites More sharing options...
Stephanie Hoyle Posted September 30, 2016 Report Share Posted September 30, 2016 This is great! Thx! I wanted to share this article if you haven't seen it yet: How much is enough: Effect of Spray Volume on Controlling Invasive Knotweeds http://techlinenews.com/articles/2016/effect-of-spray-volume-on-controlling-invasive-knotweeds Quote Link to comment Share on other sites More sharing options...
Stephanie Hoyle Posted September 30, 2016 Report Share Posted September 30, 2016 Erin, We have seen over and over and over and over this growing season the nasty impacts of mowing Japanese knotweed. Do you happen to know exactly what part of the plant is responsible for this re-growth (stem, leaves, other)? Thanks, K Quote Link to comment Share on other sites More sharing options...
ErinFuller Posted October 3, 2016 Author Report Share Posted October 3, 2016 Thanks for sharing the article - very interesting! I am FAR from an expert, but what I've read and heard is that it's the stem and root fragments that can re-sprout (and I've heard that fragments the size of a fingernail can resprout; which if true would mean mowing would be a great way to spread it around!) Quote Link to comment Share on other sites More sharing options...
Tyler Mitchell Posted October 3, 2016 Report Share Posted October 3, 2016 MNFI has a great guide to BCPs https://mnfi.anr.msu.edu/invasive-species/JapaneseKnotweedBCP.pdf It explains that JK propagates via stem and root material, and potentially by seed. The rhizome network is immense and mechanical removal is almost impossible. Anecdotally, some of our partners have had luck carefully trimming, collecting, and bagging stems and leaves then hitting with an herbicide to tackle the rhizomes. Quote Link to comment Share on other sites More sharing options...
Stephanie Hoyle Posted October 12, 2016 Report Share Posted October 12, 2016 One more thorough fact sheet: http://your.kingcounty.gov/dnrp/library/water-and-land/weeds/BMPs/Knotweed-Control.pdf Quote Link to comment Share on other sites More sharing options...
erin.jarvie Posted October 13, 2016 Report Share Posted October 13, 2016 For those using or renting injection systems for JK, where are you purchasing your equipment? Thanks! Quote Link to comment Share on other sites More sharing options...
ErinFuller Posted October 14, 2016 Author Report Share Posted October 14, 2016 This is what we bought: https://www.jkinjectiontools.com/shop/injection-systems-and-canisters/jk1000-injection-system/ Just got it yesterday, so no real experience yet, but a local landscaper uses one and has been happy. The owner of the company is really friendly and helpful too. Quote Link to comment Share on other sites More sharing options...
Nature Hannah Posted April 10, 2017 Report Share Posted April 10, 2017 I just found this knotweed Code of Practice from the Environmental Agency of the UK. It's a download document, and the first couple pages are 2013 changes. Word in the newspaper articles I'm reading is that the UK is tightening the belt and starting to REQUIRE the "knotweed removal companies" to adhere to the codes because so many make a quick buck and make the problem worse. So more changes may be coming. http://www.nonnativespecies.org/downloadDocument.cfm?id=109 More info here: https://www.gov.uk/guidance/prevent-japanese-knotweed-from-spreading Quote Link to comment Share on other sites More sharing options...
Stephanie Hoyle Posted March 31, 2023 Report Share Posted March 31, 2023 (edited) I had a question about the Japanese Knotweed Treatment document shared by the SWxSW Corner CISMA at the top of this thread. I see that it shows Cygnet Plus by name as the surfactant for glyphosate stem injection. Would another surfactant such as DuoStick Select work for this or is it a pretty specific formulation? Edited March 31, 2023 by Stephanie Hoyle Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.