Herbicides/pesticides City/County Requirements
From 12.27.245 Development Standards in the SNRO that can be found here: http://qcode.us/codes/hillsboro/
E. Landscaping in SNRO Areas. Landscaping plans for development applications submitted under Section 12.50.220 shall limit plantings within the Significant Natural Resources Area to only species on the Metro Native Plant List. Plantings within the Impact Area shall not include Nuisance Plants.
F. Use of Chemicals. Herbicides or pesticides shall not be used in a SNR or an Impact Area except as applied by a licensed applicator in accordance with either:
1. A pesticide management plan to control Nuisance Plants; or
2. To eradicate pests as defined in ORS 634.650 or diseases affecting Native Vegetation.