Search results
Results from the WOW.Com Content Network
Peach tree leaves displaying various stages of the shot hole disease: brown spots on the leaf with conidium holders in the middle (center) that eventually fall off, leaving BB-sized holes behind (left) Shot hole disease of apricot leaves. The fungal pathogen Wilsonomyces carpophilus affects members of the Prunus genera. Almond, apricot ...
Cherries and European plums originated in Europe, although the Japanese plum originated in China. [2] Trees exposed to cold in autumn and early spring can develop cankers under the bark of the trunk or branches. Cankers are usually associated with the production of amber-coloured gum that contains bacteria and oozes on to the outer bark.
Bacterial diseases; Bacterial canker Bacterium (unidentified) Dieback and leaf scorch: Xylella fastidiosa [1] [2] Fungal diseases. Fungal diseases; Annosum root rot
Brown rot blossom blight and fruit rot Monilinia fructicola Monilinia laxa. Cercospora leaf spot Cercospora circumscissa Cercospora rubrotincta. Ceratocystis canker Ceratocystis fimbriata. Constriction canker = Fusicoccum canker, Phomopsis shoot blight Phomopsis amygdali = Fusicoccum amygdali. Cytospora canker Leucostoma persoonii
Compared above is a healthy tree and segment (left) to a tree infected and containing a canker. Apple canker, caused by the fungus Neonectria galligena formerly Nectria galligena. [2] Ash bacterial canker, now understood to be caused by the bacterium Pseudomonas savastanoi, rather than Pseudomonas syringae.
Brown rot blossom and twig blight and fruit rot Monilinia fructicola Monilinia laxa. Ceratocystis canker Ceratocystis fimbriata: Cytospora canker Cytospora leucostoma Leucostoma persoonii [teleomorph] Dematophora root rot Rosellinia necatrix Dematophora necatrix [anamorph] Eutypa dieback Eutypa lata Cytosporina spp. [anamorph] Green fruit rot
Significant variation in symptoms is seen between diseases, though some symptoms are expressed across species. On a macroscopic scale, plants infected with a X. fastidiosa-related disease exhibit symptoms of water, zinc, and iron deficiencies, [27] manifesting as leaf scorching and stunting in leaves turning them yellowish-brown, gummy substance around leaves, [27] fruit reduction in size and ...
Symptoms of bacterial crown rot begin as angular water-soaked lesions on leaf surfaces and eventually spread through veins and petioles to cause death to the canopy layer of leaves. Water-soaked cankers also appear on the stem, causing it to collapse, and spread to meristems, killing the growing tips of the plant (Webb 1985; Fullerton et al ...