Diseases

Powdery mildew on Japanese barberry

Berberis thunbergii DC.

A fungal disease of Berberis thunbergii caused by the pathogens Erysiphe berberidis or Erysiphe berberidicola, characterized by a distinct white coating on leaves, shoots, and fruits.

In the reference 4 varieties crop Japanese barberry, where this is mentioned in the description.

The causative agents of powdery mildew on Berberis thunbergii are the specialized fungi Erysiphe berberidis and Erysiphe berberidicola. The infection manifests as the appearance of a white or grayish powdery coating that covers both sides of the leaf blades, young shoots, and fruits of the plant.

As the pathogen develops, the barberry tissues become deformed and yellow, which often leads to premature leaf drop. By autumn, cleistothecia—the fungus's fruiting bodies in the form of small black dots—form within the coating, ensuring the survival of the infection during the winter period.

General information about the subject — on the page Powdery mildew.

Sources8

Varieties of Japanese barberry 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.