Published September 1968. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published January 1973. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Revised February 1974. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Since around 1923 Port-Orford-cedar (Chamaecyparis lawsoniana (A. Murray)
Parl.) has been affected by Phytophthora root disease caused by the virulent introduced
pathogen Phytophthora lateralis. A systematic resistance testing and breeding program
located at the USDA Forest Service Dorena Genetic Resource Center in Cottage Grove,
Oregon was initiated in 1997 with...
Since around 1923 Port-Orford-cedar (Chamaecyparis lawsoniana (A. Murray)
Parl.) has been affected by Phytophthora root disease caused by the virulent introduced
pathogen Phytophthora lateralis. A systematic resistance testing and breeding program
located at the USDA Forest Service Dorena Genetic Resource Center in Cottage Grove,
Oregon was initiated in 1997 with...
Full Text:
December 18, 2008.
Title: Developing Techniques for Evaluating the Susceptibility of Root-disease
1. Rotbusters Field Survey.
Kokanee and Basin were the only varieties sampled in 2005. There was a significant relationship between radicle rot severity and gross yield for Kokanee but not for Basin.
In previous years, we have shown that for Jubilee, approximately 3 tons of gross yield are...