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通过对苹果轮纹病致病菌轮纹大茎点菌（Ｍａｃｒｏｐｈｏｍａｋａｗａｔｓｕｋａｉ）生物学特性初步测试，发现该菌在糖分环境中不论在单糖、双糖还是多糖的条件下，均长势良好，其中培养基中含蔗糖时长势最好；另外，不同酸碱条件的测试结果表明其适宜的ｐＨ值为５～７，尤其以ｐＨ为６时长势最好。
Through the preliminary test on the biological characteristics of Macrophoma kawatsukai, a pathogen of apple ring rot, it was found that the strain grew well in the condition of single sugar, disaccharide or polysaccharide in sugar environment, In the base containing sucrose, the growth rate was the best. In addition, the test results of different acid-base conditions showed that the optimum pH was 5 ~ 7, especially when the pH was 6.