一、前言蓟马是我国苜蓿生产的主要害虫。我国苜蓿的主产区——西北、华北和东北诸省、区苜蓿均受到蓟马的危害,甚至在我国的南方(如江苏省等)苜蓿也受到蓟马的危害,而且各地区蓟马危害苜蓿都很严重,大部分苜蓿品种的危害率均在70%以上,常常最高达100%。受蓟马危害的苜蓿产草量大幅度下降(下降20.1%),草的品质严重变劣。蓟马虫 I. Introduction Thrips are the main pests in the production of alfalfa in China. Alfalfa is the main producing area of ​​our country’s alfalfa - northwest, north and northeast provinces, the district of alfalfa are thrips harm, even in southern China (such as Jiangsu Province) alfalfa is also affected by thrips, and the thrips haze in various regions Alfalfa is very serious, most of the hazards of alfalfa varieties are more than 70%, often up to 100%. The production of alfalfa, which was endangered by thrips, dropped drastically (by 20.1%) and the quality of the grass worsened severely. Thrips bug