Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

How to Kill Japanese Knotweed Using Low Volume Foam Herbicide

1,357 views

Published on

This was a presentation at the 2014 Upper Midwest Invasive Species Conference. It discusses the use of a low drift, foam herbicide system, a novel technique for controlling knotweeds and other plants. The system was developed by Green Shoots, LLC, http://www.greenshootsonline.com/newsite/default.aspx.

Published in: Environment
  • DOWNLOAD THIS BOOKS INTO AVAILABLE FORMAT (2019 Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download Full EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download Full doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THIS can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THIS is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBooks .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THIS Helped Ignite a Movement,-- Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THIS the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THIS Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Be the first to like this

How to Kill Japanese Knotweed Using Low Volume Foam Herbicide

  1. 1. 1 Controlling Invasive Knotweeds Using Low-Volume Foam Herbicide 2014 Upper Midwest Invasive Species Conference Duluth, Minnesota Oct. 20-22 John Lampe Green Shoots, LLC Saint Paul, Minnesota
  2. 2. Overview • Non-Chemical Control • Chemical Control • Focus on: Low Volume Foam Herbicide
  3. 3. Knotweed Colony at Southwood
  4. 4. Knotweed – Grows in Tough Conditions Photo Credit: Popplewell Associates, York, UK
  5. 5. Knotweed Rhizome Extension
  6. 6. Non-Chemical Control • Not practical except with small infestations • Danger of vegetative spread • See King County, Best Management Practices (2008)
  7. 7. Chemical Control
  8. 8. Knotweed Rhizome – Tough to Kill!
  9. 9. Chemical Control: Key Problem Older parts of rhizomes are weak sinks Bashtanova et al. 2009.
  10. 10. Live Aerial Shoot Live Aerial Shoot Dead Aerial Shoot Winter Buds Winter Lateral Buds Buds Lateral Buds
  11. 11. Live Aerial Shoot Live Aerial Shoot Dead Aerial Shoot Winter Buds Winter Lateral Buds Buds Lateral Buds
  12. 12. Live Aerial Shoot Live Aerial Shoot Dead Aerial Shoot Winter Buds Winter Lateral Buds Buds Lateral Buds
  13. 13. Live Aerial Shoot Live Aerial Shoot Dead Aerial Shoot Winter Buds Winter Lateral Buds Buds Lateral Buds Can herbicide reach the weak sink buds?
  14. 14. Chemical Control Methods • Stem injection • Cut stem • Foliar
  15. 15. Key Herbicides • Glyphosate – aquatic label • Triclopyr – aquatic label; only foliar • Imazapyr – aquatic label; only foliar
  16. 16. Stem Injection
  17. 17. Stem Injection • Use hypodermic or special injector • Inject up to 5 ml into stem • Between 1st and 2nd node above ground
  18. 18. Stem Injection • Advantages: – Precision – No stem disposal – Avg control: 91-100 % (Prather + Miller 2009) • Disadvantages: – Time-consuming – Identifying treated stems – Difficulty in treating small stems – Non-target injury: 26% (Miller 2005) – And . . .
  19. 19. Biggest Disadvantage of Stem Injection • Requires 5 ml of herbicide per aerial shoot – Equivalent to cut surface application on 10 to 15 inch woody stem. AquaMaster Label. • May explain 26% non-target injury found by Miller.
  20. 20. Cut Stem • Cut stem 5 to 10 inches off ground • Immediately pour up to 3 ml into hollow of stem
  21. 21. Pouring Herbicide into Cut Stem
  22. 22. Cut Stem • Advantages: – Low cost equipment – Control? (Miller did not test) • Disadvantages: – Time-consuming – Disposal of green aerial shoots – Amount of herbicide used
  23. 23. Foliar • Advantages – Fastest application method – Decent control: 81%. (Miller 2005) – No disposal issues – Less herbicide used • Disadvantages – Off-target harm: Avg. injury: 68%. (Miller 2005) – Hard to treat tall plants
  24. 24. Follow-Up Applications • Washington State Dept. Agriculture: – Data show “significant decrease in knotweed following six years of annual treatments. – However, knotweed is still present at each monitoring site.” (Statewide Knotweed Control Program; 2010 Progress Report)
  25. 25. How Can Methods Be Improved? • Reduce repeat applications • Reduce quantity of herbicide used • Reduce off-target harm
  26. 26. We Have Been Trying Several Methods
  27. 27. Rhizome Injection
  28. 28. Injecting into Rhizome through Cut Stem
  29. 29. Rhizome Injection Needle reaches to below-ground Internode
  30. 30. Herbicide Used • AquaMaster – glyphosate; 54% a.i. • Dose at 2ml
  31. 31. Results?
  32. 32. Not very impressive • I would guess around 70% to 80%
  33. 33. Other New Methods Being Explored
  34. 34. Bend and Treat with Foam Herbicide
  35. 35. Large Foam Herbicide Dispenser with Foliar Nozzle 35
  36. 36. Treat Regrowth with Low Volume Application of Foam Herbicide 36
  37. 37. Foam Stream Ejected from Dispenser – Reduced Drift
  38. 38. What is Low Volume? • Use more herbicide (about 4% a.i.) and less water volume. • Cover 10% to 30% of foliage.
  39. 39. Why Low Volume? “The most consistent application factor that can increase glyphosate efficacy is lower carrier volumes.” Young 2006.
  40. 40. Deposits Foam on Leaves – Virtually No “Fines”
  41. 41. Foam Herbicide Clings to Leaf – No drops to bead off 42
  42. 42. Herbicide Spreads on Leaf 43
  43. 43. Herbicide Slowly Dries on Leaf – increasing absorption 44
  44. 44. Before: dense knotweed colony
  45. 45. After: Small, isolated knotweed plants
  46. 46. Approximately 11 months after single treatment Native Pilewort dominates now Scattered knotweed
  47. 47. Our Mission: To recognize opportunities and provide leadership to make our region a vibrant, place-based model for the nation. 563-864-7112; www.northeastiowarcd.org
  48. 48. Use on Japanese knotweed along Paint Creek in Northeast Iowa
  49. 49. Report from Richard Kittelson from the Northeast Resource, Conservation and Development Organization: • “We had an excellent result at the Hardees site, I'd say 80-90% effective. I just foam treated the resprouts on 9/30. The resprouts covered aprox. 10% of the area sprayed last year. It took 1/2 liter of mix.” • “The west bank that had been 95% stem injected had more resprouts, aprox. 25% of the area. That side took 1 liter of mix to treat.”
  50. 50. Testing By Dr. Timothy Miller at Washington State University • Late Summer 2014 • Comparing Spray and Foam Herbicide • Bohemian and Himalayan knotweed • Herbicides: – Rodeo (glyphosate) – Habitat (imazapyr) – Perspective (aminocyclopyrachlor) – Milestone (aminopyralid)
  51. 51. WSU testing (con.) • Used 1 liter per plot with foam herbicide • Used 2 liters per plot with spray • I.e., using ½ as much foam herbicide as spray. • Plots (I believe are 20 by 20 feet) • Research is not funded by Green Shoots; we did provide WSU with a dispenser
  52. 52. Early WSU Results – Percent Control Determined by Defoliation Type 2 WAT 4 WAT Foam 51% avg. 69% avg. Spray 46 avg. 66 avg. Note: Averages across all herbicides used and two species of knotweed.
  53. 53. Why Might Foam Work Better? • Foam is well suited for low volume applications – Less dripping – Slower drying of herbicide – Foam clings tenaciously to foliage • More surfactant used • Key Benefit: Virtually eliminates drift
  54. 54. 55 Green Shoots John Lampe – contact: •john@greenshootsonline.com •651-245-4682 (cell) Website: www.greenshootsonline.com •Email or call for copy of presentation

×