Advanced Invasive Plant Management Managing Japanese Barberry & Japanese Knotweed Connecticut Invasive Plant Symposium October 4 th , 2018 Christopher Polatin, M.S., CERP Polatin Ecological Services, LLC & Land Stewardship, Inc.
Ecological Restoration Process of assisting the recovery of an ecosystem that has been degraded, damaged, or destroyed . • Invasive plant management is considered as one step in the ER process • The native species displaced by the ip’s are restored to the site after ip management is completed • The secondary ecological effects of herbicides or other invasive eradication methods are reduced to a minimum
Japanese Barberry What’s a land manager to do?
Land Use History Photo credit: Brian DeGasperis
4/30/2013
Childs Road Information Date # person Amt. herbicide applied days (gallons) July 2016 9 108 (2% Rodeo; 0.5 non-ionic surfactant) July 2017 5 8 (Thinvert 8% Rodeo) September 2018 3 0.75 (Thinvert 8% Rodeo)
2017
2018
Regeneration
Upland IP Management 2011 2012 2014 2013
Japanese Knotweed Early Development • Brian P. Colleran and Katherine E. Goodall (2015) Extending the Timeframe for Rapid Response and Best Management Practices of Flood-Dispersed Japanese Knotweed (Fallopia japonica). Invasive Plant Science and Management: April-June 2015, Vol. 8, No. 2, pp. 250-253. • Brian P. Colleran and Katherine E. Goodall (2014) In Situ Growth and Rapid Response Management of Flood-Dispersed Japanese Knotweed (Fallopia japonica). Invasive Plant Science and Management: January-March 2014, Vol. 7, No. 1, pp. 84-92.
Connecticut River Bank Stabilization, Gill, MA
Small Patches
Stem Injection Stem injection with JK Injection System
Knotweed Superorganism
Knotweed Reduction Mid-June
Foliar Herbicide Application After JK flowers (Mid-August)
Results after Initial Treatment
Results after Follow-up #1 Treatment
Results after Follow-up #2 Treatment
Emerging Success IPM & ER Fannie Stebbins Memorial Wildlife Refuge, Longmeadow, MA
IP Success Criteria 1. Year 1. Initial treatments (combination of mechanical and chemical) results in 90% control. 2. Year 2. The first follow-up treatment (targeted chemical) results in 95% control. 3. Year 3. The second follow-up (manual or targeted chemical) results in 99% control. 4. Annual Stewardship and Maintenance (primarily manual) maintains 99% control.
Revegetation
Seeding • Seed collection, processing, and storage • Direct seeding from commercial seed sources • Seedbed preparation: good seed to soil contact with light raking, rolling, or stomping
Smother Crops Oats seeded into woodland Use of buckwheat cover crop to smother planting area. treated knotweed area.
Revegetation Methods: Cuttings
Revegetation: Shrubs 2013 2015
Revegetation: Shrubs Knotweed treated with herbicide in 2007. Native shrubs planted in 2008. Photos taken in Spring 2009 McLean Open Space, Belmont, MA
McLean Open Space, Belmont, MA
Marble Works Park, Middlebury, VT
Marble Works Park, Middlebury, VT
Marble Works Park, Middlebury, VT
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