CNPS Healthy Nurseries and Habitats Committee

About Us, 7/23/24


    “Sampling to Detect Infestations”
  • NEW – “Sampling to Detect Soilborne Phytophthora Infestations in California Habitat Restoration Plantings: A Technical Guide”, March 2025 – PSW-GTR-279, Swiecki, Ted, et al. – Background information and guidance for land managers and professionals. Some of the best published field photos to date. – pdf link
  • 2023/24 Annual Committee Report, 5/16/24 – pdf link
  • Start clean and stay clean when visiting native plant habitats
    • Cleanliness tips for hikers and trail users, 5/16/23 – Detailed info. – pdf link
    • Pocket Guide “Every Step Counts”, 1/16/25 – (fold vertically) – pdf link
  • Plant Nursery Conditions Favor Phytophthora Root Rots, Ted Swiecki and Elizabeth Bernhardt, Phytosphere Research, 2/21/2016 – pdf link
  • Phytophthora Species in Native Plant Nursery Stock: Issues and Implications, Ted Swiecki and Elizabeth Bernhardt, Phytosphere Research, 4/5/2016 – pdf link
  • Buying healthy plants: What to look for at a nursery; A guide for California Native Plant Society chapters purchasing buy-ins for plant sales, authored by the committee, 12/2016 – pdf link

    • “Every Step Counts” pamphlet
  • CNPS Best Management Practices (BMPs) for Producing Clean Nursery Stock, Ted Swiecki and Elizabeth Bernhardt, Phytosphere Research, 4/9/2016 – pdf link
  • Phytosanitary Procedures for CNPS BMPs for Producing Clean Nursery Stock, Ted Swiecki and Elizabeth Bernhardt, Phytosphere Research, 9/17/2020 – This is a methods suppliment for the above BMP document. – pdf link
  • Phytophthora Testing Procedures for CNPS BMPs for Producing Clean Nursery Stock, Ted Swiecki and Elizabeth Bernhardt, Phytosphere Research, 4/11/2016 – pdf link
  • How Using Fungicides in Nurseries Can Increase the Risk of Moving Phytophthora to Planting Sites, Tedmund Swiecki and Elizabeth Bernhardt, Phytosphere Research, 2/21/2016 – 21 February 2016 – pdf link

Phytophthora and Resource Management – more from our partner organizations

  • The Working Group for Phytophthoras in Native Habitats – pdf link (slide show)
  • AIR program – “Accreditation to Improve Restoration and Native Plant Nursery Stock Cleanliness”
    • “Producing clean native California nursery stock to prevent pathogen outbreaks in native ecosystems” – pdf link (slide show)
  • “From Microbes to Resource Management,” a conversation with Dr. Linh Anh Cat, Flora magazine, fall 2021 – pdf link
  • Leachate Baiting Technique Training – Ted Swiecki, Phytosphere Research, 2/17/2019 – video link
    • (60 minutes)
  • “Phytosanitary Practices” – 60 minute video download – (Google Drive server, may be slow)
  • Phytosphere Research, miscellaneous references – link
  • “Steaming-on-the-Go,” a mobile soil steaming service for nurseries in the Bay Area and surrounding counties, provided by Dominican University – pdf link

Professional Training and Resources for Landscapers (coming soon)