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：2019-001-0001-064

藏品描述：本病初期病徵於葉片上產生黃褐色小斑點，以後逐漸擴大而呈赤褐色紡錘形病斑，周圍為黃色。此種病斑互相連接後沿葉脈伸長擴大，其周圍仍為黃色，中央部分則呈枯乾之灰褐色，後期此種長紡錘形枯斑可互相結合而使全葉枯乾如火燒狀。枯乾部位產生無數灰黑色小點，即為本病之柄子殼。本病主要為害葉部，但猖獗時亦可能危害葉鞘。本病不但直接影響甘蔗生育，亦能影響糖量，病株糖量損失可達28.1%，青葉數銳減為其重要原因。

Leaf scorch is one of the major diseases of sugarcane. It attacks the leaf resulting to reduction in yield. First, the disease causes red to dark brown minute spots with a yellowish halo on the leaf, which soon elongate, coalesce and with yellow margin. The lesion center becomes necrotic and pycnidia develop as minute blackish dots on the upper leaf surface. The disease may blight the entire leaf blade except the midrib and is more severe on the lower older leaves. In dry season, there is a premature discoloration of the tissues, and the whole leaf eventually develops a typical scorched appearance.