Oregon Vegetation Management Association
Oregon Department of Agriculture – Search for Pesticide Recertification Classes
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Washington Vegetation Management Association
Washington State Weed Association Annual Weed Conference
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Oregon Department of Agriculture – InterAgency Noxious Weed Symposium
State of Oregon: Meetings and Symposiums - Interagency Noxious Weed Symposium
Oregon State University – Pesticide Safety Education Program
Recertification Courses | College of Agricultural Sciences | Oregon State University Vegetation Management Association