Tranzschelia pruni-spinosae var. discolor

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2008-05-01_Tranzschelia_pruni-spinosae_(Pers.)_Diet_221248

Tranzschelia pruni-spinosae var. discolor

Tranzschelia pruni-spinosae var. discolor is a plant pathogen that causes rust disease on various species of plants in the Rosaceae family. This fungus is known to infect species such as blackthorn (Prunus spinosa) and related plants.

Symptoms

Infected plants typically exhibit symptoms such as yellow-orange powdery pustules on the undersides of leaves, which can eventually lead to defoliation and reduced plant vigor. In severe cases, the disease can impact fruit production and overall plant health.

Disease Cycle

The fungus overwinters as spores on infected plant debris. In spring, these spores are dispersed by wind or rain to new plant tissues, where they germinate and infect the host plant. The cycle continues as new spores are produced and spread to other plants, especially under favorable environmental conditions.

Management

Management of Tranzschelia pruni-spinosae var. discolor involves cultural practices such as pruning infected plant parts, promoting good air circulation, and avoiding overhead irrigation. Fungicides may also be used to control the disease, especially in commercial settings.