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：2019-001-0001-061
藏品描述：主要危害葉基部、莖及根際部。被害初期，根冠呈水浸狀，葉柄則如熱水燙過般軟化。嚴重時，蘿蔔中心部腐敗軟化消失成空洞，並發出惡臭。葉也軟化腐敗。有時病狀轉弱時，自根冠發出新葉，呈畸形。本病致病細菌無法自行侵入寄主組織內，必須經由昆蟲之幼蟲，或颱風及雨水所造成的傷口侵入。
Bacterial soft rots are caused by several types of bacteria, but most commonly by species of Erwinia, Pectobacterium, and Pseudomonas. It is a destructive disease of fruits, vegetables, and ornamentals found worldwide, and effects genera from nearly all the plant families. The bacteria mainly attack the fleshy storage organs of their hosts, but they also affect succulent buds, stems, and petiole tissues. With the aid of special enzymes, the plant is turned into a liquidy mush in order for the bacteria to consume the plant cell's nutrients. Disease can be spread by simple physical interaction and insects. Control of the disease is not always very effective, but sanitary practices can slow the spread of the disease and protect yields.