BACTERIAL LEAF SPOT OF TOBACCO.
BACTERIAL LEAF SPOT OF TOBACCO.
复制标题
烟草细菌性叶斑病。
DOI：
10.1126/science.46.1189.361
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发表时间：
1917
期刊：
影响因子：
56.9
通讯作者：
A. C. Foster
中科院分区：
文献类型：
--
作者：
F. A. Wolf;A. C. Foster
在北卡罗来纳州的某些地区发现了烟草细菌性叶斑病。这种疾病由于传播迅速，被适当地命名为“野火”。在移栽时，它首先表现出严重的破坏性，因此在一些田地里，必须用第二次和第三次移栽来代替苗木。从这些苗木上取下的苗床上的植物已被发现有病害，这表明病害是从苗床传入的。该病最初出现约1厘米的圆形黄色斑点。在直径上。一分钟的棕色区域表示“点的中心”.与：在几天内，棕色区域将扩大到2或3厘米。直径为半透明的边缘，周围环绕着一个宽阔的褪绿光晕。当斑点很多时，它们融合在一起，形成大片棕色的不规则区域，在严重的情况下，这些区域涉及大部分叶片组织。
A BACTERIAL leaf spot of tobacco has been found to occur within certain sections of North Carolina. This disease, because of the rapidity with which it spreads, has appropri-ately been given the name" wild fire." It first manifests itself in seriously destructive form at the time of transplanting, so that in some fields it has been necessary to replace the seedlings by a second and a third transplanting. Plants in the seed beds from which these seedlings were taken have been found to be diseased, indicating that the malady was introduced from the seed beds. The disease first appears as circular yellow spots about 1 cm. in diameter. A minute brownl area indicates the'center of the spot. With: in a few days the brown area will have enlarged to 2 or 3 cm. in diameter with a translucent border and surrounded by a wide chlorotic halo. When the spots are numerous they fuse, forming large brown irregular areas which in severe cases involve most of the leaf tissues.