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香料新品种毛鞘茅香,冠锈病是其主要病害之一。发病初期叶及叶鞘出现橙黄色椭圆形小病斑,后期病部变黑,破裂之斑点形似王冠。 该病在春秋两季茅香田均可发生,以春季受害最为突出。主要有3个发病时期:始发期,一般在5月中下旬,病株率0—7％;高峰期在5月底至6月上旬,病株率39—96％;衰退期在7月上旬,茅香老化成熟时。冠锈病的发生,除和气候因子外与田间肥力有关,调查结果表明,新老茬茅香田凡肥力高长势旺的感病率高,病株率95％(病指2.09);肥力低的田块病株率39.0％(病指1.36)。 茅香冠锈病茵(Puccinia coronat)
Spice new varieties of wool Mao Mao, crown rust is one of its major diseases. Occurrence early leaves and leaf sheath orange oval small lesions appear, the latter part of the disease black, broken spots like the crown. The disease in the spring and autumn Mao Xiang Tian can occur, the most prominent spring victims. There are three main stages of the onset: the onset period, usually in late May, the strain rate of 0-7%; peak in the end of May to early June, the diseased rate of 39-96%; recession in early July , Mao Xiang aging mature. Crown rust occurred in addition to the weather factors and field fertility, the survey results show that the new crop of Mao Xiang Tian who fertility is high and prosperous prevalence of high morbidity rate of 95% (disease index of 2.09); low-fertility fields The disease rate was 39.0% (disease index 1.36). Puccinia coronat