小麦叶蜂(Dolerus tritici Chu)是富阳市复掀的地域性小麦害虫。在近两年田间监测、调查的基础上,试验采用Iwao回归分析法,对其幼虫的空间分布、理论抽样数进行了测算,并对序贯抽样技术进行了研究。结果表明,该虫的聚块性指标大于1,属聚集型空间分布;当防治指标为1.3头/样方、置信水平1.64时,理论抽样数为18个;序贯抽样的防治下限方程为d0=1.3n-2.1%姨n,上限方程为d1=1.3n+2.1%姨n。 Dolerus tritici Chu is a regional wheat pest repelled in Fuyang City. Based on the field monitoring and investigation in recent two years, Iwao regression analysis was used to test the spatial distribution and theoretical sampling number of larvae. The sequential sampling technique was also studied. The results showed that the conglomerate index of this pest was more than 1, which was an aggregated spatial distribution. When the control index was 1.3 heads / quadrats and the confidence level was 1.64, the theoretical sampling number was 18, and the lower limit of control for sequential sampling was d0 = 1.3n-2.1% aunt n, upper bound equation is d1 = 1.3n + 2.1% aunt n.