Washington State University

Extension Forestry

Invasive Forest Weed Control Field Practicums

September 30, 2017 – Arlington


Got weeds?

Invasive forest weeds cause economic and environmental damage

Is ivy pulling down your trees? Are blackberries taking over your newly planted trees? Do you have stubborn holly in your understory? Are dreaded species like knotweed and Scotch broom popping up on your property? Invasive weeds not only inhibit the growth of or even kill your trees, they cause significant ecological harm by taking over ecosystems, crowding out native species, degrading wildlife habitat, and increasing erosion. Controlling these noxious invaders is a challenging but essential task for landowners.

At these field practicums, you will learn to identify and control some of the most common invasive weeds that cause economic and environmental damage in forests, including: holly, ivy, blackberries, knotweed, reed canary grass, butterfly bush, Scotch broom, and more. The practicum will cover both chemical (including organic-approved) and non-chemical control options.

Field-based, hands-on learning

These practicums are completely field based and centered around hands-on learning. After safety briefings, you will don protective gear (provided) to watch demonstrations and then do hands-on practicing of multiple control techniques, including hand-pulling, root digging, using a weed wrench, sheet mulching, foliar herbicides, cut stump treatments, and stem injection. You will learn about how to use both traditional and organic-approved herbicides safely and effectively, including what products to use for specific weeds and where to get those products, how to read a label, proper safety equipment, avoiding environmental damage, pesticide laws, tank mixing, calibrating a sprayer for the proper application rate, and clean-up.


Saturday September 30, 2017
9:00 a.m. – 4:00 p.m.
Gates open at 8:00 a.m.


New Tree Farm
1130 Stanwood Bryant Rd
Arlington, WA 98223


Pre-registration is required!
Individual Registration

  • $20/person before September 23rd Save $15!
  • $35/person September 23rd through 5:00 PM September 28th

Couple Registration (same household/ownership)

  • $30/couple before September 23rd Save $15!
  • $45/couple September 23rd through 5:00 PM September 28th

Student and Master Gardener discounts are available (call 206-263-1128 for details). To be eligible for a refund, cancellations must be received by 5:00 PM September 22nd, and refunds may be subject to a $5.00 processing fee.

Pre-Registration is Required

Space is limited and is first come, first served. Registration must be received no later than 5 p.m. Thursday September 28th.

  • Register by mail – Send in the Registration Form with a check (made out to WSU Extension).
  • Register online – Register online with a credit card via Brown Paper Tickets (subject to credit card processing fee).

Important Additional Information:

  • For safety during activities, you MUST wear long pants, long-sleeve shirts, and sturdy, close-toed footwear. Anyone not dressed appropriately will not be permitted to participate.
  • Each sessions will be located in different areas at the site. Please be prepared to do some walking along trails and forest roads, including some uneven (and possibly muddy) areas. Also be prepared to work in brushy areas during activities
  • Restrooms and a hand-wash station will be available on site.
  • Coffee and very light refreshments will be available in the morning only before the sessions start. Please bring your own sack lunch, snacks and water bottle.

Program Sponsors

This program is funded by the Washington State University Western Extension Risk Management Education Center, the USDA National Institute of Food and Agriculture (NIFA), and the Snohomish Conservation District.

All Are Welcome

Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office. Reasonable accommodations will be made for persons with disabilities and special needs who contact Kelsey Ketcheson at 206-263-1128 or at least two weeks prior to the event.

Extension Forestry, 600 128th St SE Everett WA 98208, 425-357-6017, Contact Us
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