黄斑星天牛产卵刻槽的空间分布格局及抽样技术

黄斑星天牛是新疆伊犁部分地区杨树、柳树、榆树等树种的主要蛀干性害虫.通过判断空间分布型聚集度的5项指标,并利用Iwao M*-m回归分析法、Taylor幂法则对黄斑星天牛产卵刻槽的空间分布型和抽样技术进行了研究,研究结果表明黄斑星天牛的产卵刻槽在柳树上呈聚集分布,Iwao M*-m回归方程M*=5.24+1.03m(r=0.998 2),利用回归方程中的两个参数值α、β,计算在不同允许误差下(0.1,0.2,0.3)的抽样数公式N0.1=239 7.16/m+11.52,N0.2=599.29/m+2.88,N0.3=266.35/m+1.28,计算了黄斑星天牛产卵刻槽在不同密度下的最适抽样数,并制作了序贯抽样分析表,对在生产实践中根据人力、物力确定调查样本数、制定防治指标都有一定的借鉴意义.

Spatial Distribution Pattern and Sampling Technique for Anoplophora nobilis Ganglbauer in Spawning Groove

Anoplophora nobilis Ganglbauer is an important stem-borer pest for Poplar,willow,elm of Yili region,in Xinjiang.The spatial distribution of egg of A.nobilis was analyzed with five aggregation indexes,Iwao's distribution function and Taylor's power law in this paper.The results showed that the spatial distribution of egg of A.nobilis was aggregated,the regression equation of I wao M*-m was M*=5.24+1.03 m(r=0.998 2),the sample number formula of Different permissible error(0.1,0.2,0.3) was N0.1=239 7.16/m+11.52,N0.2=599.29/m+2.88,N0.3=266.35/m+1.28,by using the parameters α and β in Iwao M*-m regression equition.In this paper,we determined the optimal and sequential sampling numbers which would have a certain reference meaning for determine the survey sample number.