摘要
农作物病害流行程度划分标准是确定病害流行轻重的主要依据。在研究分析当前病害流行程度划分标准存在问题的基础上，提出病害流行程度划分标准应该由多项指标改为一项指标，分别以相应行政区域的加权病情指数或虫口密度来表示，并给出了其测算方法。同时提出行政区域范围的大小不同，病害流行程度分级标准的指标不同。行政区域小，分级指标值大；行政区域大，分级指标值小。从而解决了目前实际工作中病害流行程度分级标准不规范的问题。
The determination on severity of crop epidemic is mainly based on the standards of the epidemic degrees of crop diseases. By analysis of the problems of presently used standards of the epidemic degrees of crop diseases, a new grading method in identifying the epidemic degrees of crop diseases was suggested, formerly used multiple standards were integrated into one comprehensive standard in this new methods. The index of the comprehensive standard is indicated either by mean values of weighted disease indexes or by the populations of the insect pests, the comprehensive index was also graded and weighted by the scope of incidence area. The smaller region of the incidence area, the greater value of the comprehensive index, and vice versa. The grading standards were harmonized by using the new methods.
出处
《植保技术与推广》
2001年第6期10-12,共3页
Plant Protection Technology and Extension
