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首页> 外文期刊>Journal of Agriculture of the University of Puerto Rico >CLADOSPORIUM TENUISSIMUM COOKE CAUSING LEAF SPOTS IN TARO: A NEW DISEASE IN PUERTO RICO
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CLADOSPORIUM TENUISSIMUM COOKE CAUSING LEAF SPOTS IN TARO: A NEW DISEASE IN PUERTO RICO

机译：CLADOSPORIUM代谢物Cooke在塔罗牌造成叶斑：波多黎各的新病

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摘要

A new disease in taro [Colocasia esculenta (L.) Schott] caused by Cladosporium tenuissimum Cooke has been identified in Puerto Rico. At the onset of symptoms in the field, the fungus causes reddish brown leaf spots that become tan to brown with age (Figure 1A and IB); spots are circular or irregular. On the upper leaf surface, there are pale greenish-yellow spots that correspond with the spots on the lower leaf surface; when lesions coalesce they form larger necrotic areas. Colony growth in non-acidulated potato dextrose agar (PDA) showed a dark green color with a velvety appearance on one side and a black color on the reverse side. By using isolation and moist chamber procedures, and following the description of Barnett and Hunter (1998), the pathogen was identified as Cladosporium sp., a common fungus on taro throughout the Pacific that has been reported in Louisiana (Holcomb, 1989).
机译：在波多黎各发现了一种由芋头枯萎病引起的芋头新疾病[Colocasia esculenta（L.）Schott]。在田间出现症状时，真菌会引起红褐色的叶斑，随着年龄的增长，棕褐色变为棕褐色（图1A和图1B）。斑点是圆形或不规则的。在上部叶片表面上，有浅绿色的黄色斑点，与下部叶片表面上的斑点相对应。当病变合并时，它们会形成较大的坏死区域。未酸化的马铃薯葡萄糖琼脂（PDA）的菌落生长呈深绿色，一侧呈天鹅绒状外观，反之则呈黑色。通过使用隔离和湿室程序，并按照Barnett和Hunter（1998）的描述，病原体被鉴定为Cladosporium sp。，这是整个太平洋芋头上常见的真菌，路易斯安那州已有报道（Holcomb，1989）。

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