慈菇褐斑病又叫斑点病。发生普遍,严重影响慈菇生产,现简介如下; (一)危害症状 该病多发生在连作田。6月中旬始病,主要危害叶片。叶上密生深褐色小斑,斑上常有白色小点,为病菌的子实体。发病严重时,数个病斑愈合呈不规则大斑,最后叶片变褐焦枯。 Mushroom brown spot is also known as spot disease. Occurred in a common, serious impact Sagittaria production, are as follows; (A) the risk of the disease occurred in the crop fields even. Beginning in mid-June, the main hazard leaves. Small dark brown spots on the leaves, spots often white dots, fruiting bodies of bacteria. Serious onset, several lesions were irregular large plaque spotted, the last leaves brown coke dry.