Diseases

Plum Phytophthora root rot

Prunus L.

A plum disease caused by oomycetes of the genus Phytophthora (predominantly P. cinnamomi and P. megasperma), manifesting as root rot and crown rot.

In the reference 15 varieties crop Plum, where this is mentioned in the description.

In plums, the disease manifests as the decay of feeder roots and the formation of reddish-brown lesions on the bark in the crown area. Upon removing the bark at the infection site, a clear boundary between the affected brown tissue and healthy cream-colored tissue is observed, often accompanied by gummosis. The aerial part of the tree suffers from decline: chlorosis, premature leaf drop, branch dieback, and gradual plant death are observed.

Specific resistance gene complexes, analogous to the R-genes of Solanaceae, have not been described for this crop. The primary method for reducing susceptibility is the use of resistant rootstocks, in particular certain forms of cherry plum such as Myrobalan, rather than breeding specific scion varieties.

General information about the subject — on the page Late blight.

Sources8

Varieties of Plum mentioned in the description

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.

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Prunus L. · Plum

Tydeman, Henry M.|deceased, late of East Malling, England by Elizabeth Mary Tydeman, executrix, East Malling, England by William Marcus Tydeman, executor, Bangor, Wales

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