两种测报灯对浙中地区玉米田害虫的种群监测与动态分析

Population monitoring and dynamic analysis of pests in maize fieldsin central area of Zhejiang Province by two types of forecasting lamps

为研究浙中地区不同玉米害虫的发生规律,在东阳市同时使用自动虫情测报灯和高空测报灯对玉米田亚洲玉米螟、草地贪夜蛾、桃蛀螟、小地老虎、劳氏黏虫、黏虫、东方蝼蛄和斜纹夜蛾进行种群监测。结果表明:自动虫情测报灯和高空测报灯监测的种群动态基本一致,但峰值数量存在差别,高空测报灯诱集的成虫数量高于自动虫情测报灯;亚洲玉米螟、草地贪夜蛾、桃蛀螟、小地老虎、劳氏黏虫、黏虫和斜纹夜蛾在浙中地区每年均可发生4—5代,东方蝼蛄每年可发生1代;高空测报灯监测数量具有“突增突减”现象,亚洲玉米螟、草地贪夜蛾和黏虫的春季高峰均比自动虫情测报灯提早2—6 d。利用高空测报灯和自动虫情测报灯监测峰值的时间差可有效指示迁飞性昆虫的迁飞行为。

In order to study the occurrence law of different pests in maize fields in central area of Zhejiang Province,the population of Ostrinia furnacalis,Spodoptera frugiperda,Conogethes punctiferalis,Agrotis ypsilon,Leucania loreyi,Mythimna seperata,Gryllotalpa orientalis and Spodoptera litura in maize fields were monitored in Dongyang City by automatic pest forecast lamp(AFL)and high altitude forecast lamp(HAFL)at the same time.The results showed that the population dynamics monitored by AFL and HAFL were basically the same,but there were differences in the peak numbers.The number of adults trapped by HAFL was higher than that of AFL.O.furnacalis,S.frugiperda,C.punctiferalis,A.ypsilon,L.loreyi,M.seperata,and S.litura could occur 4—5 generations every year,and G.orientalis could occur 1 generation every year in central area of Zhejiang Province.The monitoring quantity of HAFL had a phenomenon of“sudden increase and sudden decrease”,and the spring peak of O.furnacalis,S.frugiperda and M.seperata was about 2—6 days earlier than that of AFL.The time difference between peak monitored by HAFL and AFL could effectively indicate the migration behavior of migratory insects.