CITY OF WILSONVILLE INTEGRATED PEST MANAGEMENT PLAN September 17, 2018 Prepared By City of Wilsonville With Support From EnviroLogic Resources, Inc. Northwest Center for Alternatives to Pesticides TABLE OF CONTENTS 1.0 INTRODUCTION .................................................................................................................................. 1 2.0 INTEGRATED PEST MANAGEMENT DEFINITION ........................................................................ 2 3.0 IPM GOALS ........................................................................................................................................... 3 3.1 Related City Policies and Plans .......................................................................................................... 3 4.0 IPM OBJECTIVES ................................................................................................................................. 4 5.0 IPM STRUCTURE ................................................................................................................................. 6 5.1 City IPM Coordination and Leadership Team .................................................................................... 6 5.2 Zone Management ............................................................................................................................... 7 5.3 Management Areas ............................................................................................................................. 7 6.0 CULTURAL AND MECHANICAL PRACTICES................................................................................ 8 6.1 Cultural Practices for Minimizing Pest Issues-Buildings and Structures............................................ 8 6.1.1 Sanitation ..................................................................................................................................... 8 6.1.2 Exclusion ..................................................................................................................................... 8 6.1.3 Clean-Up of Building Site ......................................................................................................... 8 6.1.4 Protect Structures from Water and Soil Contact .......................................................................... 8 6.2 Cultural Practices for Minimizing Pest Issues-Shrubs, Trees, and Ornamental Beds ........................ 8 6.2.1 Plan for Structural Diversity ........................................................................................................ 8 6.2.2 Establish Healthy Starts ............................................................................................................... 8 6.2.3 Avoid Bare Soil ........................................................................................................................... 9 6.2.4 Minimize Soil Disturbance .......................................................................................................... 9 6.2.5 Minimize Irrigation ...................................................................................................................... 9 6.2.6 Use Coarse Wood Chip Mulches ................................................................................................. 9 6.3 Cultural Practices for Minimizing Pest Issues-Stormwater Facilities ................................................. 9 6.3.1 Follow Establishment Guidelines When Plants Are Young ........................................................ 9 6.3.2 Mulch Around Plantings Above the Wet Zone ............................................................................ 9 6.3.3 Regularly Remove Sediment ..................................................................................................... 10 6.4 Cultural Practices for Minimizing Pest Issues-Hardscapes ............................................................... 10 6.4.1 Practices for Minimizing Weed Issues in Hardscapes ............................................................... 10 6.5 Cultural Practices for Minimizing Pest Issues-Natural Areas ........................................................... 10 6.5.1 Minimize Soil Disturbance ....................................................................................................... 10 6.5.2 Maintain Vegetative Cover ....................................................................................................... 10 6.6 Cultural and Mechanical Practices for Minimizing Pest Issues-Turfgrass ....................................... 10 6.6.1 Mowing ...................................................................................................................................... 10 6.6.2 Aeration .................................................................................................................................... 11 6.6.3 Thatch Management................................................................................................................... 11 6.6.4 Topdressing ................................................................................................................................ 11 6.6.5 Overseeding ............................................................................................................................... 11 6.6.6 Rolling ....................................................................................................................................... 11 7.0 PLANT NUTRITION ........................................................................................................................... 12 7.1 Soil Nutrient Testing ......................................................................................................................... 12 7.2 Turfgrass Nutrient Requirements ...................................................................................................... 12 7.3 Fertilizer Treatment Areas ................................................................................................................ 13 7.4 Fertilizer Storage ............................................................................................................................... 13 7.5 Fertilizer Documentation .................................................................................................................. 13 7.6 Buffer Zones ..................................................................................................................................... 13 8.0 IRRIGATION ....................................................................................................................................... 14 8.1 Irrigation System ............................................................................................................................... 14 8.2 Water Conservation ........................................................................................................................... 14 8.3 Hydrophobicity or Water Repellency ............................................................................................... 14 8.4 Plant Growth Regulators ................................................................................................................... 14 9.0 TREE MANAGEMENT ....................................................................................................................... 15 9.1 Tree Selection ................................................................................................................................... 15 9.2 Planting Locations............................................................................................................................. 15 9.3 Tree Planting ..................................................................................................................................... 15 9.4 Tree Maintenance .............................................................................................................................. 15 9.5 Tree Removal .................................................................................................................................... 15 10.0 ORGANIC MATERIALS MANAGEMENT ..................................................................................... 16 10.1 Leaves ............................................................................................................................................. 16 10.2 Woody Brush .................................................................................................................................. 16 10.3 Logs, Stumps, and Large Woody Debris ........................................................................................ 16 10.4 Other Management Practices .......................................................................................................... 16 11.0 PEST POPULATION DEFINITION .................................................................................................. 17 12.0 PEST MONITORING AND PEST CONTROL ................................................................................. 17 12.1 Pest Scouting ................................................................................................................................... 17 12.2 Pest Control ..................................................................................................................................... 17 13.0 ACTION LEVEL THRESHOLDS ..................................................................................................... 18 14.0 CHEMICAL CONTROL