宁夏草原虫害的发生情况及防治效果

Occurrence and Control of Grassland Pests in Ningxia

[目的]明确宁夏草原虫害的发生情况,并对其进行有效防治。[方法]采用扫网调查法、样方框调查法、发生期调查法、百步惊蛾法、枝条计算法等方法调查草原蝗虫、沙蒿金叶甲、沙蒿木蠹蛾、苜蓿蓟马、苜蓿蚜虫的发生面积以及防治前后的密度。[结果]宁夏共发生草原虫害71.23万hm^2,草原蝗虫危害面积为39.16万hm^2,沙蒿金叶甲危害面积为18.75万hm^2,沙蒿木蠹蛾危害面积为3.41万hm^2,苜蓿斑蚜、苜蓿蓟马危害面积为9.91万hm^2;共完成草原虫害防治10.56万hm^2,占危害面积的14.8%;4.5%高效氯氰菊酯对草原蝗虫防治效果显著,是防治草原蝗虫的理想药剂。[结论]研究结果为宁夏草原生态环境保护与建设提供了基础资料。

Objective] The aim was to study the occurrence situation of grassland pests in Ningxia,and explore effective control measures. [Method] By using sweep network survey method,sample box survey method,occurrence period investigation method,100 step surprised moth method,branch calculation method,the occurrence area of grasshoppers,Chrysolina aeruginosa,Holcocerus artemisiae,Frankliniella occidentalis,al-falfa aphid,density before and after control was investigated.[Result] The results showed that total occurrence area of grassland pests in Ningxia was 71.23 ＆#215;104 hm2 ,damage area of grasshoppers, Chrysolina aeruginosa,Holcocerus artemisiae,Frankliniella occidentalis and alfalfa aphid were 39.16 ＆#215;104 hm2 ,18.75 ＆#215;104 hm2 ,3.41 ＆#215;104 hm2 ,9.91 ＆#215;104 hm2 respectively;total control area was 10.56 ＆#215;104 hm2 ,accounting for 14.8%of damage area;4.5% beta cypermethrin had significant control effect on grasshoppers,which is an ideal agent for the prevention and control of grasshoppers.[Conclusion] The study can provide basic data for protection and construction of eco-environment in Ningxia grassland.