探明河西地区寒旱农业番茄田桃蚜的种群发生分布特征及其测报抽样技术，为当地桃蚜监测预警与综合防治提供技术参考。采取田间随机调查、空间分布型指数法测定和线性回归检验的方法，研究了甘肃武威凉州区番茄田间桃蚜种群空间结构特征及其序贯抽样技术。结果表明，凉州区寒旱农业番茄桃蚜种群发生及分布的空间结构特征呈聚集分布型。根据平均拥挤度(M*)与平均虫口密度(m)之间Iwao回归关系式M*=1.836 9 m-1.169 2，得出番茄桃蚜若虫及成虫的理论抽样模型N=1.962/D2(-0.169 2/m+0.836 9)和序贯抽样技术模式T(1， 2 )=5n±8.780 8■，根据模型在估计防治指标下可得出最适抽样数。

To investigate the population occurrence and distribution characteristics of Myzus persicae on tomato fields in cold and dry farming areas in the Hexi region, as well as their monitoring and sampling techniques, the population structure characteristics and sampling techniques of M. persicae populations in tomato fields in Liangzhou District, Wuwei, Gansu Province were studied using random surveys, spatial distribution type tests, and linear regression methods. The results indicated that the occurrence and spatial distribution pattern of M. persicae was clustered in cold and dry farming areas in Liangzhou District. Based on the Iwao regression relationship between mean crowding(M*) and mean density(m), M*=1.836 9 m-1.169 2, the theoretical sampling model for nymphs and adults was established as N=1.962 / D2 (-0.169 2/m+0.836 9), with a sequential sampling model T( 1, 2 )=5n±8.780 8■. The optimal sampling size based on the estimated control indicators was calculated.

S436.412

武威市自然科学基金(WW23A03RPZ006) 。