• It was revealed in an extensive survey that the occurrence of apple Valsa canker (Valsa ceratosperma) is correlated negatively with potassium content in bark.

    矫治试验结果表明,春季增施钾肥,可提高树皮量并减轻腐烂病发生程度。

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  • 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.

    采用平板培养测定S-921菌株及其发酵液苹果树腐烂病菌作用

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  • 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.

    采用平板培养测定S-921菌株及其发酵液苹果树腐烂病菌作用

    youdao

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