苹果树腐烂病
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apple tree valsa canker
苹果树溃疡病
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The effects of S-921 strain (Streptomyces aureus) and its fermented broth on apple tree canker, Valsa mali, were tested by plating and free culture methods.
采用平板和离体培养法测定S-921菌株及其发酵液对苹果树腐烂病菌的作用。
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