WSDA has recertification courses available. A list of upcoming courses is published on their website.
Bugwood.org - Invasive species image database
EDDMapS - Early Detection & Distribution Mapping System
Invasive.org - Center for Invasive Species and Ecosystem Health
OMRI - Organic Materials Review Institute
NAISMA - North American Invasive Species Management Assoc.
Pacific Northwest Weed Management Handbook
WSU Integrated Weed Control Project
WSU Pesticide Information Center Online
WSWS - Western Society of Weed Science
Franklin County MapSifter online mapping tool
Benton County Noxious Weed Control Board
Benton-Franklin Counties WSU Extension Office
Washington State Noxious Weed Control Board
Washington Department of Agriculture (pesticide applicator licensing)
Environmental Protection Agency
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