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：2019-001-0001-043
藏品描述：棉花常見的病害，嚴重影響棉花產量和經濟效益。多在生長後期染病，初在葉片上產生許多暗紅色小點，後擴展成近圓形、邊緣紫紅色、略隆起、中間褐色病斑，遇有潮濕條件產生白色黴層，受害葉片很易破裂。
Circular red lesions on leaves which enlarge and turn white or gray in the center; normally lesions often have concentric rings and possess a red margin; dark gray spore masses form in the centers of the lesions making them appear dark gray on leaf. Cercospora leaf spots, which are fairly common on cotton. Spotting can progress to heavy defoliation prior to harvest.