摘要
马铃薯甲虫Leptinotarsa decemlineata Say是一种重要的害虫,为明确其在新疆的空间分布,及时采取有效的防控措施,在田间调查的基础上,采取随机取样和Iwao回归分析法对新疆乌鲁木齐地区的马铃薯甲虫成虫、卵块和幼虫的空间分布型、理论抽样数及幼虫的序贯抽样方法进行了研究。结果表明,马铃薯甲虫各虫态空间格局的聚块性指标均大于1,空间分布型为普通群聚型;对低龄幼虫进行序贯抽样,当防治阈值为50头/样方、置信水平为1.96时,防治上、下限方程分别为:d1=50n+81n和d0=50n-81n,当百株虫量达到756头以上时需要进行防治。
Colorado potato beetle, Leptinotarsa decemlineata Say, is believed to be a disastrous alien invasive pest to China. In order to make a clear understanding of the spatial distribution of Colorado potato beetle in Xinjiang, and to carry out control methods effectively and timely, using random sampling and Iwao regression analysis, spatial distribution pattern, theoretical sampling number of Colorado potato beetle （ adults, eggs and larvae）, and sequential sampling of larvae were studied through the field investiga- tion, in Urumqi, Xinjiang. The results showed that the spatial distribution patterns of the beetle in each instar were ordinary cluster, and congregation indices were above 1. Sequential sampling was carried on for young-age larvae to determine control index and sampling number. When the control threshold of larvae was 50 heads/quadrat, and the confidence level was 1.96, the upper limit and lower limit control function of sequential sampling was： d1 = 50n ＋ 81√n and d0 = 50n -81√n. It is necessary to take actions to control Colorado potato beetle when the beetle＇ s number was higher than 756 heads/100 plants.
出处
《植物保护学报》
CAS
CSCD
北大核心
2010年第3期206-210,共5页
Journal of Plant Protection
基金
国家"973"项目(2006CB102007)
国家"十一五"科技支撑计划(2006BAD08A01)
公益性行业科研专项(200803024)
国家重点实验室自主研究课题专项(SKL2007SR08)
关键词
马铃薯甲虫
lwao回归法
空间分布型
序贯抽样
防治阈值
Colorado potato beetle
Iwao regression analysis
spatial distribution pattern
sequential sampling
control threshold
