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：2019-001-0001-051
藏品描述：本病為系統性細菌感染，感染初期一、二葉片白天萎凋下垂，晚間恢復正常，接而半面或整株葉片變成永久萎凋並黃化，甚或枯褐，莖部呈現單條或數條黑色條斑，部份或全部根系受害變黑腐敗。菸苗、本圃均會發生全株受害。高溫(30～35度)及高濕適於立枯病之發生，罹根瘤線蟲之菸株立枯病更易發生而嚴重。
Bacterial wilt initially appears as wilting of one or two young leaves during the hot hours of the day with recovery during the cooler evening. If conditions are optimal, wilt progresses rapidly with the leaves remaining green. In some cases, the wilt will be unilateral. If the environment is suboptimal, wilt develops slowly with the leaves turning light green and then progressively yellower. Necrotic areas frequently appear between the veins and at the leaf margins. During hot, dry conditions, wilted leaves become irregularly scalded and do not detach from the stem.