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One article to fully understand what southern magnolia brown spot disease is
What is southern magnolia brown spot disease? Please provide an introduction. Southern magnolia brown spot disease, also known as spot disease, is a common disease of southern magnolia. It occurs in all areas of China where southern magnolia is cultivated, with more severe outbreaks in Suzhou, Nanjing, Wuhan, Shenzhen, Tianjin, Shenyang and other places. The symptom is that the pathogen mainly infects the leaves. The surface of diseased leaves...