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Maloney PE, Lynch SC, Kane SF, et al. Disease Progression of Phytophthora ramorum and Botryosphaeria dothidea on Pacific Madrone. Plant Dis. 2004;88(8):852-857doi: 10.1094/PDIS.2004.88.8.852.
Maloney, P. E., Lynch, S. C., Kane, S. F., & Rizzo, D. M. (2004). Disease Progression of Phytophthora ramorum and Botryosphaeria dothidea on Pacific Madrone. Plant disease, 88(8), 852-857. https://doi.org/10.1094/PDIS.2004.88.8.852
Maloney, P E, et al. "Disease Progression of Phytophthora ramorum and Botryosphaeria dothidea on Pacific Madrone." Plant disease vol. 88,8 (2004): 852-857. doi: https://doi.org/10.1094/PDIS.2004.88.8.852
Maloney PE, Lynch SC, Kane SF, Rizzo DM. Disease Progression of Phytophthora ramorum and Botryosphaeria dothidea on Pacific Madrone. Plant Dis. 2004 Aug;88(8):852-857. doi: 10.1094/PDIS.2004.88.8.852. PMID: 30812513.
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Plant Dis. 2004 Aug;88(8):852-857. doi: 10.1094/PDIS.2004.88.8.852.

Disease Progression of Phytophthora ramorum and Botryosphaeria dothidea on Pacific Madrone.

Plant disease

P E Maloney, S C Lynch, S F Kane, D M Rizzo

Affiliations

  1. Department of Plant Pathology, University of California, Davis 95616.

PMID: 30812513 DOI: 10.1094/PDIS.2004.88.8.852

Abstract

Infection by Phytophthora ramorum was associated with stem and leaf lesions of Pacific madrone (Arbutus menziesii) seedlings and saplings. In addition, a common and native pathogen, Botryosphaeria dothidea, caused similar leaf and stem lesions. When exposed to natural levels of inoculum in forests infested with P. ramorum, 50 to 66% of madrone saplings used as bait died. Recovery of P. ramorum from colonized plant tissue on culture media was generally low. From initial infection, P. ramorum was not culturable from leaf tissue after a mean of 3.5 weeks or from stem tissue after a mean of 8 weeks. Generally, B. dothidea was recovered more frequently from necrotic stems and leaves than was P. ramorum. Experimental inoculations of madrone seedlings showed that leaf and stem lesion lengths were, on average, greater on tree seedlings inoculated with P. ramorum than on those inoculated with B. dothidea. P. ramorum and B. dothidea appear to coexist in stem and leaf tissue, forming a novel pathogen complex, affecting growth and reproduction of Pacific madrone.

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