Table of Contents

Introduction

Narrative Summary (including comments from NY Botanical Garden’s fern curator, 

  and world expert genus taxonomist  from the University of Vermont)

January 10 2016:  more die-off found in the northwest corner of Seward Park (with video)

December 27 2016: die-off on Mercer Island's Upper Luther Burbank Park  (with video)

Paul Talbert: Comments on PCR Results 

WSU Puyallup Phytophthora PCR Results 

Novermber 13: a presentation to the Washington Native Plant Society, by Dr. Tim Billo and undergraduates Kramer Canup and Tristan O'Mara 

September 22: Grant Proposal to the Bullitt Foundation 

Informal final report from UW’s Tim Billo and his two undergraduate students
to the Seattle Parks Field Committee (June 2nd, 2016)

Lab report from Dr. Marianne Elliott, WSU

LSU Professor Valverde, plant pathologist, 2008 paper on “new virus causing disease in [a related] fern”

Site visit by WSU pathologists, and the “introduced phytophthora” thesis

PCR and Sequencing for Pathogen Detection (July 25th, 2016)

Detecting Phytophthora (O'Brien et al, 2009)

 Related google scholar search.

 

More (Very Likely) Die-Off at Seward Park

Al Smith gave me a tour of a previously unreported die-off area, in the northwest corner of the forest.  Thus in addition to the the slowly expanding original "ground zero", and a similar area in Mercer Island's Upper Luther Burbank Park, we now apparently have discontiguous spread at Seward.  We also observed a small concentrated patch of dead crowns near the junction of the Erratic and sqebeqsed trails (see small red dot below).