Geosmithia morbida is a filamentous ascomycete that causes thousand cankers disease in the eastern black walnut tree. This pathogen is commonly found in the western U.S.; however, recently the disease was also detected in several eastern states where the black walnut lumber industry is concentrated. G. morbida is one of two known phytopathogens within the genus Geosmithia, and it is vectored in...

A new canker disease of Lithocarpus densiflorus, Quercus agrifolia, Q. kellogii, and Q. parvula var. shrevei in California is shown to be caused by Phytophthora ramorum. The pathogen is a recently described species that was previously known only from Germany and The Netherlands on Rhododendron and Viburnum. This disease has reached epidemic proportions in mixed evergreen and redwood forests ove...

Canker symptoms were observed on almond trees in the Fez-Meknes region, Morocco. Isolations conducted from infected branch and trunk showing internal external brown lesions. Four representative fungal isolates screened, their identities confirmed by cultural traits sequence analysis of DNA using two genes, ITS region (internal transcribed spacer) calmodulin (cmdA). The identified fungi Curvular...

The chief objective in fire Might control has been the eradication of hold-over cankers, since these cankers are known to be the principal source of primary inoculum in the spring. Consequently the possibility suggested by Rosen (11, 12Y that the fire bhght organism, Erwinia amylovora (Burr.) Bergey et al., may overwinter in the beehive has complicated the problem by introducing one more possib...

Thousand cankers disease (TCD), first documented in the western United States early 2000s, has spread into nine and seven eastern states northern Italy. TCD incidence severity differ between outbreak localities. Black walnut ( Juglans nigra ) trees, introduced both urban plantation settings States, have been severely impacted as evident by high mortality. However, localities, where J. is native...

Pleurostoma richardsiae is associated with host trunk diseases, known to cause dieback, cankers and wilting of woody trees, human infections. This fungus was isolated from wood tissues declining olive trees grapevines showing esca disease symptoms, in the Apulia region Italy. Fungus detection has been based on morphological molecular features, which are time-consuming identify require well-trai...