Diseases
Juglans regia L.
A fungal disease caused by pathogens Marssonina juglandis and species of the genus Colletotrichum, affecting all aerial plant organs. It manifests as necrotic spots on leaves, fruits, and shoots, leading to premature defoliation and reduced kernel quality.
In the reference 46 varieties crop Persian walnut, where this is mentioned in the description.
The primary causal agent of walnut anthracnose is the fungus Marssonina juglandis (teleomorph Ophiognomonia leptostyla). Recent research also confirms the etiological role of members of the genus Colletotrichum, including C. siamense, C. fioriniae, C. aenigma, C. fructicola, C. gloeosporioides, C. liaoningense, and C. sojae.
Disease symptoms develop on leaves, petioles, shoots, and fruits. Circular brown or black spots form on the leaves, which enlarge and coalesce into necrotic areas, causing premature leaf drop. On fruits, the infection manifests as depressed dark spots, which trigger rotting and the loss of kernel nutritional quality. Disease development is directly dependent on high air humidity and spring rainfall.
General information about the subject — on the page Anthracnose.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Juglans regia L. · Persian walnut
Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE)
Juglans regia L. · Persian walnut
Zhadan Viktor Markiyanovich, Larionova Tat`yana Petrovna, Mayatskaya Aleksandra Dmitrievna, Mayatskij Ivan Nikiforovich
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Stefan Gandev, Argir Zhivondov
Juglans regia L. · Persian walnut
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Juglans regia L. · Persian walnut
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Juglans regia L. · Persian walnut
A. Zhivondov, N. Nedev, I. Yovchev, M. Ivanova
Juglans regia L. · Persian walnut
FRANÇOIS RAOUL VEZ
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut
Juglans regia L. · Persian walnut