Diseases

Alternaria Leaf Spot of White Mustard

Sinapis alba L.

A fungal disease of white mustard caused by pathogens of the genus Alternaria, primarily Alternaria brassicicola, manifesting as dark, zonate spots on leaves, stems, and pods.

In the reference 7 varieties crop White mustard, where this is mentioned in the description.

The pathogens causing Alternaria leaf spot in white mustard are the fungi Alternaria brassicicola, as well as Alternaria brassicae and Alternaria raphani. The disease affects the vegetative and reproductive organs of the plant, causing the appearance of dark, zonate spots, which, at high intensity, leads to premature leaf drop and the formation of shriveled seeds in the pods.

White mustard possesses high natural resistance to Alternaria brassicicola, which is why the species often serves as a genetic donor in the breeding of other crucifers. The plant's defense mechanism is complex in nature and is provided by enhanced expression of genes and signaling pathways for abscisic and jasmonic acids.

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

Sources8

Varieties of White mustard 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.