Pitch Canker Disease in California: Pathogenicity, Distribution, and Canker Development on Monterey Pine (<i>Pinus radiata)</i>

Abstract

Pitch canker disease, caused by Fusarium subglutinans, has become prevalent on Monterey pine (Pinus radiata) in several central and southern coastal counties of California. Although Monterey pine is the most frequently infected host, the pathogen has also been recovered from bishop (P. muricata), Aleppo (P. halepensis), and Canary Islan (P. canariensis) pine. All 167 isolates of F. subglutinans recovered from diseased tissue, insects, and air samples in California were virulent on Monterey pine in greenhouse pathogenicity tests (...)