THE MULTIPLE-INFECTION TRANSFORMATION
THE MULTIPLE-INFECTION TRANSFORMATION
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DOI：
10.1111/j.1744-7348.1948.tb07385.x
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发表时间：
1948-01-01
影响因子：
2.6
通讯作者：
GREGORY, PH
中科院分区：
文献类型：
--
作者：
GREGORY, PH
需要注意的是，当某一有机体或任何其他事件的发生率以在标准面积上出现或不出现的百分比表示时，可能会产生对结果的误解。当以存在率表示时，疾病梯度被人为地压平。该税。平坦的程度取决于疾病的发病率和所选地块的大小。给出了一个表，当有机体或事件随机分布时，可以根据该表进行必要的转换。给出了叶片病害的例子：(1)随机分布（疫霉）；（2)聚类（裸子孢子囊）和clavariaeforme）。简要讨论了检测和测量聚集的方法。
Attention is drawn to the possibility of misinterpreting results that may arise when the incidence of an organism, or any other event, is expressed as % presence or absence on plots of standard area. Disease gradients when expressed as % presence are shown to be artificially flattened. The amt. of flattening depends on incidence of the disease and the size of plot chosen. A table is given by which the necessary transformation can be made when the organism or event is distributed at random. Examples are given of leaf diseases: (1) distributed at random (Phytophthora infestans); and (2) aggregated (Gymnosporangium juniperi-virginianae and G. clavariaeforme). Methods of detecting and measuring aggregation are briefly discussed.