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：2019-001-0001-053

藏品描述：又稱小麥葉銹病，發病初期在各表面形成不規則赤褐色病斑、散生。其孢子堆而後膨大，在成熟時，破壞表皮由其中飛散赤褐色粉末(夏孢子)，邊緣形成暗黑色、粒點，稍膨大，長橢圓形之病斑(冬孢子堆)，但表皮並不破裂。

Brown rust in wheat is caused by the fungus Puccinia triticina. Symptoms are small, orange-brown pustules randomly scattered over leaves. It is common to see a yellowing of the leaf around the rust pustules. During autumn and winter symptoms are usually confined to older leaves. It is advisable to check crops carefully for symptoms in early spring and be prepared to protect high-risk crops and susceptible varieties. In the summer brown rust pustules are randomly scattered. Late in the season brown rust can become very severe and result in leaf death. Leaf sheaths and ears sometimes become affected. Tiny black spore cases may be seen on diseased plant tissue, indicating a second developmental stage of the fungus (the teliospore stage).