作者：曾惠中
類別：圖書文獻類 - 手稿
材質：紙質
年代：1969~1969
尺寸：長:24.6 x 寬:20.5 (cm)
藏品來源：曾惠中捐贈
登錄號：2019-001-0001-004
藏品描述：芋頭的葉子上形成大片的褐色同心輪紋病斑。病變的部位是病原菌為了產生白色的粉狀孢子囊，利用吸器導致葉肉細胞失去養分而造成。病原體喜歡高濕度、高降雨量，並利用雨水飛濺進行傳播。主要感染的部位是葉子，但也可以感染葉柄和球莖。
A highly infectious plant disease that is characterized by the formation of large brown lesions on the leaves of infected taro plants. Lesions are the result of pathogen leaching nutrients out of the leaves via haustoria to create white powdery rings of sporangia This pathogen grows best in high humidity and high rainfall environments offering the pathogen means of dispersal via rain splash as well as a warm humid environment that favors hyphal growth across the infected plant.