Fusarium circinatum

Pine Pitch Canker - Fusarium circinatum Nirenberg and O'Donnell
(syn. Fusarium subglutinans f. sp. pini)
 

On P. radiata seedling

On P. radiata sapling

On P. radiata tree

Pine pitch canker
The pathogenic fungus pine pitch canker is native to the southeastern United States, Mexico, and Haiti (USDA Forest Service, 1998). Introduced into California, it is killing the narrowly endemic Monterey (=Radiata) and Torrey pines (Pinus radiata and P. torreyana). The fungus might also cause serious damage to "[a]ll economically important native pine species" in California (USDA Forest Service, 1998).

Sources
United States Department of Agriculture Forest Service. 1998. Pest Risk Assessment of the Importation of the Importation into the United States of Unprocessed Pinus and Abies Logs from Mexico. General Technical Report FPL-GTR-104. February 1998. 116 pages