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:2019-001-0001-008
藏品描述:甘蔗葉片上密佈病斑,中肋及葉鞘亦被感染。病斑稍呈紡錘形或橢圓形,具黃暈但有些則不明顯,大小甘蔗均可被害。
Initial symptoms of ring spot are small, elongated, oval-shaped spots that are dark green to reddish-brown with narrow yellow halos. Typical older symptoms of ring spot are large and elongated lesions with irregular outlines and red-brown margins. These spots may coalesce and form patches which result in leaf chlorosis and necrosis.