影响害虫种群数量消长的因素很多。诸因子之间,以及因子及害虫消长之间的变化,没有严格的界限,并非确定性的关系而是模糊关系。目前在我国农作物病虫害发生程度的预报上,常用轻、中、重等模糊的概念。因此,可以引入模糊数学中的分析方法,进行病虫害发生的分析与描述。 There are many factors affecting the growth and decline of pest populations. There are no strict boundaries between factors, as well as the changes between factors and the growth and decline of pests. They are not deterministic but fuzzy relations. At present, the degree of occurrence of crop pests and diseases in our country, the commonly used light, medium and heavy fuzzy concept. Therefore, the analysis methods in fuzzy mathematics can be introduced to analyze and describe the occurrence of pests and diseases.