Publications by authors named "Wei H Belisle"
is a long-established, well known and globally important genus of plant pathogens. Phylogenetic evidence has shown that the biologically distinct, obligate biotrophic downy mildews evolved from at least twice. Since, cladistically, this renders 'paraphyletic', it has been proposed that evolutionary clades be split into multiple genera (Runge et al.
View Article and Find Full Text PDFThe Marina strawberry tree ( Demoly. 'Marina') is a popular ornamental tree species, prized for its glossy evergreen foliage, display of pink and white bell-shaped blooms, and strawberry-like ornamental fruits. In April 2024, a foliar sample from a Humboldt County, California nursery, where had been detected earlier in the year, was submitted to the CDFA Plant Pest Diagnostic Laboratory exhibiting symptoms of marginal leaf necrosis (Fig.
View Article and Find Full Text PDFArticle Synopsis
- Over 55% of U.S. lettuce is produced in California, with Monterey County as the leading region, where stunted and wilted lettuce varieties were observed in 2023-2024, showing significant disease symptoms.
- Diseased plants exhibited brown lesions that developed into sunken cavities, with infection rates ranging from 5% to 75%, and lab analysis revealed the presence of Phytophthora, a harmful pathogen associated with these symptoms.
- Genetic analysis of the isolates indicated hybridization among different Phytophthora species, suggesting the emergence of a new hybrid taxon proposed as P. taxon ×salinaslettuce, which was tested for pathogenicity on various lettuce cultivars.
Article Synopsis
- The text describes a species of evergreen dogwood native to East Asia, known for its attractive creamy bracts and red fruit, with a recent issue involving leaf spots and dieback reported from a nursery in Humboldt County.
- In February 2023, samples from affected plants showed distinct leaf spots and were analyzed in a lab, leading to the isolation of specific fungal characteristics including coralloid hyphae and sporangia.
- Genetic analysis confirmed the isolate's identity and pathogenic potential, demonstrating a 100% match to known strains, and a pathogenicity test was performed on healthy plants to further evaluate the impact of the isolate.