نتایج جستجو برای: cankers
تعداد نتایج: 304 فیلتر نتایج به سال:
Abstract Tomato bacterial canker, caused by Clavibacter michiganensis subsp. ( Cmm ) (Li et al. 2018), is a common destructive disease worldwide. The bacterium colonizes plant’s vascular system causing characteristic symptoms such as wilting, cankers, brown and black discoloration of vessels, white spots on the fruit leaves. In present work, isolates were collected from infected tomato plants 1...
In the southeastern United States, establishment of short-rotation intensively cultured plantations hybrid poplar has been hindered by its susceptibility to stem cankers. We evaluated tradeoffs between biomass yield and disease tolerance in genotypes belonging P. deltoides × maximowiczii (DM), nigra (DN), trichocarpa (TM), (DD) taxa. hypothesized that canker resistant will have thicker bark but...
Some of the most damaging tree pathogens can attack woody stems, causing lesions (cankers) that may be lethal. To identify the genomic determinants of wood colonization leading to canker formation, we sequenced the genomes of the poplar canker pathogen, Mycosphaerella populorum, and the closely related poplar leaf pathogen, M. populicola. A secondary metabolite cluster unique to M. populorum is...
The genus Celoporthe was first described when C. dispersa was discovered in South Africa associated with dieback and cankers on trees in the Myrtales. Four additional species were recently described from Eucalyptus and Syzygium cumini in China as well as S. aromaticum and Eucalyptus in Indonesia. Inoculation trials have shown that all Celoporthe species, including those that have not been found...
Neofusicoccum parvum, a member of the Botryosphaeriaceae family, is a vascular pathogen that causes severe decline and dieback symptoms in grapevines worldwide. The draft genome of the grapevine isolate N. parvum UCR-NP2 provides a first glimpse into the complex set of putative virulence factors that this pathogen may use to rapidly colonize plants.
Thousand cankers disease (TCD) of walnut trees (Juglans spp.) results from aggressive feeding in the phloem by the walnut twig beetle (WTB), Pityophthorus juglandis, accompanied by inoculation of its galleries with a pathogenic fungus, Geosmithia morbida. In 1960, WTB was only known from four U.S. counties (in Arizona, California, and New Mexico), but the species has now (2014) invaded over 115...
The ascomycete Geosmithia morbida and the walnut twig beetle Pityophthorus juglandis are associated with thousand cankers disease of Juglans (walnut) and Pterocarya (wingnut). The disease was first reported in the western United States (USA) on several Juglans species, but has been found more recently in the eastern USA in the native range of the highly susceptible Juglans nigra. We performed a...
In March 2022, sunken cankers were observed on the stem and branches of young mature Alnus glutinosa trees in central Portugal (Canelas, 40°42’17’’N; 8°33’59’’W). Cankers characterised by necrotic lesions outer inner bark that progressively girdled circumference causing extensive canopy dieback (Figure 1). The incidence disease was estimated at 70% (linear plot 50 m long). To isolate causal age...
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