城市园林害虫预警指标体系的构建

Construction of Early-Warning Index System to the Pests of Urban Greenbelt

为了探索城市园林害虫信息化防控,构建绿地害虫灾害预警体系,采用多指标综合计算法,将害虫灾变过程分为警源、警兆和警情共3个指标层,每个指标层下设定10项指标内涵进行1-5级赋值,并给合权重系数进行运算,设定警源、警兆和警情的最大值分别为30、30、40,并将害虫灾变的综合警度值分为0-40、40-60、60-80、80-100共4个级段,分别对应为轻警、中警、重警、巨警。

The aim of this study is on one hand to explore defence and control of insect pests in urban landscape,on the other hand to construct forecast system of insect pests on green land.Three indicators(alarm origin,alarm aura and alarm situation) were set up to evaluate process of insect pests occurrence,and within each indicator 30 sub-indicators were set up and coded from level 1 to level 5.Using comprehensive calculation method of multiple indicators and combining with weighted coefficient,the value of each indicator and comprehensive values of the three indicators were obtained.The maximal values of the three set indicators were 30,30 and 40 respectively,and the comprehensive values were classified into four regions,0-40、40-60、60-80、80-100,to represent four levels.These four levels respectively indicated the degrees of alarm: mild,moderate,important and serious.