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Subject: First occurrence of Coniothyrium canker of Eucalyptus in Mexico
Date posted: December 05, 2001
Source: British Society for Plant Pathology (New Disease Reports)
Coniothyrium canker, a damaging disease of Eucalyptus spp. caused by the pycnidial ascomycete Coniothyrium zuluense, has been discovered in the Tabasco state of Mexico. In 1989, the disease was recognized for the first time in South Africa, and has also been found in Thailand. The Mexican isolates of C. zuluense are more allied to those from South Africa. Infection by C. zuluense ultimately results in large, girdling cankers that reduce wood quality and can precipitate tree death. The USDA Animal and Plant Health Inspection Service considers this eucalypt pathogen to have a moderate risk potential, particularly to Eucalyptus spp. found in the western United States.