几种病源微生物农药对高寒牧区草原蝗虫的防治效果试验

Control Effect Test of Several Pathogenic Microbial Pesticides on Grassland Locusts in Alpine Pastoral Areas

为选择出适宜川西北高寒牧区草原蝗虫的最佳病源微生物农药,本文选择了0.4亿孢子/毫升蝗虫微孢子SC、2.5%绿僵菌OL、400亿孢子/克球孢白僵菌WP对草原蝗虫进行防治试验,比较三种病源微生物农药的防治效果。结果表明三种病源微生物农药均有一定的防治效果,且具有良好的安全性;绿僵菌和球孢白僵菌速效性好于蝗虫微孢子,药后10d防效分别为85.01%和84.12%,显著高于蝗虫微孢子的防治效果;而蝗虫微孢子持效性好于绿僵菌和球孢白僵菌,药后30d防效为72.32%,且残存蝗虫感病率30d时达到70.01%,显著高于绿僵菌和球孢白僵菌对蝗虫感病率。

In order to select the best pathogenic microbial pesticides suitable for grassland locusts in alpine pastoral areas of northwest Sichuan,40 million spores/ml locust microspore SC,2.5%Metarhizium anisopliae OL and 40 billion spores/g Beauveria bassiana WP were selected to conduct control effect test on grassland locusts,and the control effects of the three pathogenic microbial pesticides were compared.The results showed that the three pathogenic microbial pesticides had certain control effects,and they were all very safe;the quick effect of Metarhizium anisopliae and Beauveria bassiana was better than that of locust microspores,and the control effect was 85.01%and84.12%respectively 10 days after treatment,which was significantly higher than that of locust microspore.However,the long-lasting effect of locust microspore was better than that of Metarhizium anisopliae and Beauveria bassiana,the control effect was 72.32%30 days after treatment,and the infection rate of the remaining locusts reached 70.01%on the 30 th days,which was significantly higher than that of the locusts treated with Metarhizium anisopliae and Beauveria bassiana.