Fungal Diseases Of The Mountain Ash
Fungal Diseases of the Mountain Ash. Mountain ash (Sorbus spp.) grows in more than 30 states across the U.S. and in nearly all Canadian provinces. The American mountain ash (S. Americana) and northern mountain ash (S. decora) are native to North America, while other species, including the European mountain ash (S. aucuparia), were introduced from other continents. Mountain ash is vulnerable to several types of fungal pathogens, including those responsible for leaf spot diseases and cankers.
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