2019 Stop The Invasion: Weed Management 101


Thank you for attending 2019 Stop the Invasion!


In order to continue to improve this event, we kindly ask our attendees to complete a short survey about this year’s Stop the Invasion event.

2019 Stop The Invasion Survey


The Columbia Gorge Cooperative Weed Management Area, the Washington Invasive Species Council, Washington State University Extension, and APHIS are co-hosting a fantastic opportunity to learn about invasive species in the Columbia River Gorge. We will be teaching identification and control methods for dealing with common weeds, as well as reporting methods for high priority invasive problems. We’ll also be learning about important non-plant pests.

Bring your friends and neighbors and learn how to ‘Stop the Invasion’! This informative class will help you gain control over garden pests and contribute to the ecological health of the region.

This all-day workshop will focus on:

  • Integrated Pest Management
  • Weed identification for EDRR weeds
  • Management options for hard-to-control weeds
  • Exotic invertebrate pests
  • Prevention strategies and how to report invasive species
  • Calibration exercises and pesticide label comprehension

Recertification Credits

  • Oregon Department of Agriculture (ODA) = 4 Core Credits and 2 Other Credits (6 Credits Total)
  • Washington State Department of Agriculture (WSDA) = 7 Recertification Credits
  • International Society of Arboriculture (ISA) = 3.5 Certified Arborist Credits
  • Oregon Landscape Contractors Board (OLCB) = 6 Certified Education Hours


For registration, visit: 



Stop the Invasion: Weed Management 101

April 4th 2019, 8:00am – 4:00pm

Hegewald Center, Skamania County

710 SW Rock Creek Drive, Stevenson, WA 98648

8:00 Doors open for treats and coffee

8:30 Introduction to Integrated Pest Management for Weeds

Rachel Suits (Oregon State University)

Pests are defined as a species that interferes with human activities, property, or health. Integrated Pest Management (IPM) combines cultural, biological, mechanical and chemical strategies to manage pests on your farm and land. This presentation will dive into the basics of IPM and how to use the strategies to manage weeds on your farm and land.

9:20 How to Manage Your Weeds

Mitch Bixby (City of Portland — Bureau of Environmental Services)

This presentation will focus on control methods for common invasive plants found in Oregon and Washington. Control methods include hand pulling, mechanical controls (like mowing) and recommended herbicide applications.

10:30 Break

10:45 Can we slow the invasion of insect pests?

Josh Vlach (Oregon Department of Agriculture)

In Oregon, we have found over 100 exotic invertebrates established in Oregon since 2007. Many of the important invertebrate pests we deal with in our gardens and landscape are exotic species, and we continue to bring in new pests. There is no sign of a slowing of the invasion. We will discuss established exotic pests and their impacts, new Oregon arrivals, and those on the near horizon. We will end the session discussing practical ways to work toward stopping this endless invasion.

12:00 Lunch on your own

1:00 Newer and Lesser Known Noxious Weeds of Washington

Wendy DesCamp (Washington State Noxious Weed Control Board)

Wendy will review recently listed noxious weeds in Washington State, focusing on their identification as well as including information on impacts and their control methods. Noxious weeds that are lesser known, but may be growing in the area, will also be reviewed with a focus on identification.

2:00 Break

2:15 Decontamination 101

Brianna Widner (Washington Invasive Species Council)

Brianna will discuss the basic steps everyone should take to prevent the spread of invasive species. She will highlight the different levels of decontamination and when to apply each type. How to report invasive species will also be covered.

2:45 Spray Calibration – Why and How To

Marty Hudson (Klickitat County Noxious Weed Program)

Marty will cover the fundamentals of sprayer calibration and some basics of herbicide labels, why calibration is important functionally and legally. Hopefully we’ll be able to do some hands on outdoor calibration exercises with a couple of different types of application equipment.

4:00 End

Please note:

  • Lunch will NOT be provided at the event, so please bring a lunch or plan on eating at one of Stevenson’s local restaurants during the break. 
  • On the day of the event, please park behind the Hegewald Center near the Skamania County Fairgrounds; parking is not allowed in the front of the building.


Questions? Email the CWMA Coordinator at columbiagorgecwma@gmail.com