摘要
[目的]研究黄刺蛾幼虫在核桃幼园的空间分布型与抽样技术,为其测报和防治提供理论依据。[方法]采用聚集指标法,Iwao回归分析法和Taylor指数法评判黄刺蛾幼虫的空间分布型,根据Iwao-Kuno理论抽样数学模型确定其理论抽样公式。[结果]测定的聚集指标值C>1,I>0,K>0,m*/x>1,CA>0;Iwaom*-m回归中α=5.845 6>0,β=1.996 6>1;Taylor指数lga=0.741 6>0,b=1.474 0>1。聚集均数λ>2。[结论]黄刺蛾幼虫在核桃幼园的空间分布型为聚集分布,聚集度随密度增大而增强。聚集原因由昆虫本身习性和环境共同引起的。其最适理论抽样公式为n=t2/D2(6.845 6/x+0.996 6)。
[Objective]The spatial distribution pattern of Cnidocampa flavescens larva and sampling technique were studied to provide the base for forecasting and control of Cnidocampa flavescens.[Method]The spatial distribution pattern of Cnidocampa flavescens larva was examined by aggregation indices,Iwao m*-m regression analysis methods and Taylor indices,the formula of theoretical sampling was determined by the mathematical model of Iwao-Kuno about theoretical sampling.[Result]The aggregation indices were C>1,I&...
出处
《安徽农业科学》
CAS
北大核心
2010年第36期21074-,21078,共2页
Journal of Anhui Agricultural Sciences
基金
西北农林科技大学科技推广项目
关键词
黄刺蛾
空间分布
抽样技术
Cnidocampa flavescens Walker
Spatial distribution patter
Sampling technique
