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Stemphylium vesicarium (Wallr. 1833) E.G. Simmons 1969
The fungus is widely distributed and causes leaf diseases on a variety of crops. These include, among others, brown spot of pear, leaf spot on garlic, leaf blight of onions, and purple spot disease of asparagus.
On pear the spots expand, affecting the leaves, fruits and branches. Infected leaves and fruits drop prematurely and can be the source of new outbreaks in the coming year. Management typically relies on the use of fungicides.
The ascospores are around 33 x 14 µm large, ellipsoidal with rounded ends, yellowish brown, smooth and with thick gelatinous sheath. They typically have 7 transsepta.
|• Deutsch:||Schwarzfleckenkrankheit der Birne|
|• English:||brown spot of pear
purple spot of asparagus
leaf spot of garlic
|• Français:||stemphyliose du poirier|