2008年广西第三代稻纵卷叶螟大发生特点及原因简析  

Serious Occurrence Characteristics of Rice Leafroller(Third Generation)in Guangxi and Its Reason Analysis

作　　者：唐洁瑜[1] 王华生[1] 刘建文[1] 

机构地区：[1]广西壮族自治区植保总站,南宁530022

出　　处：《中国农学通报》2009年第2期192-195,共4页Chinese Agricultural Science Bulletin

基　　金：广西壮族自治区人事厅项目(2001218)

摘　　要：受虫源、气候因子和水稻种植条件等因素的综合影响,广西第三代稻纵卷叶螟发生呈现发生范围广、面积大、成虫峰次多、峰期持续长、蛾量大、虫口密度高、为害期长、田间虫态复杂等特点,发生面积75.6万hm2,2008年为1949年以来最严重年份。分析其主要原因为:5月下旬—6月中旬第三代发生期气候适宜;第二代残留基数大,外地迁入虫源数量多,第三代成虫滞留量多;水稻生育期推后、插花田增多,稻纵卷叶螟食料充足;由于雨日多,劳动力紧张,以及应急防治农药缺乏等原因,造成应急防治实施难度大等。Influenced by pests source, climate and planting conditions etc. factors, there are several occurrence characteristics of third generation in Guangxi, including occurrence wide range, large area, many adult peaks, long-period peaks, large number of moths, high population density, long-period damage, complex field insect, total occurrence area 756 000 hm^2, being most serious occurrence one year since 1949. The authors analyze several main reasons, including suitable climate during occurrence period （from late May to mid- June） of third generation, large second generation residual base, large number of abroad migration moths, considerable quantities stranded third generation moths, delayed rice growing period, more bridge fields, adequate pest food, as a result of many rain days, labor tension, inadequate emergency control pesticides, being difficult to implement emergency control etc.

关 键 词：广西 稻纵卷叶螟 大发生 原因 分析 

分 类 号：S435.112.1[农业科学—农业昆虫与害虫防治]