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：2019-001-0001-012

藏品描述：病原菌Fusarium oxysporum經土壤或種子傳播危害幼苗，嫩莖先萎凋、腐敗，繼之倒伏枯死。生長中後期被害時，葉片由下往上枯死，莖和葉均呈赤褐色，檢視被害株根部和接近地面莖部管維管束均呈赤褐色。發生嚴重時整株亞麻枯死，如火燒狀。

Flax can be attacked by Fusarium oxysporum at any stage in their development. Although this disease primarily causes wilt, seedling blight can occur when seedlings are grown at high temperatures. In typical wilt, the leaves turn yellow or greyish yellow, the top leaves thicken, growth stops, and the plants die and turn light brown. Frequently the plant is only stunted, in which case the leaves turn yellow and die prematurely, or the stem dies and new, apparently healthy, lateral branches develop. A late infection or a weak attack may be evidenced by premature ripening. The amount of damage may vary from a very little when only a few plants are attacked, to catastrophic with almost all of the crop killed.