绿僵菌油剂防治新疆山地草原蝗虫的田间试验

Field Trial on the Control of Grasshoppers in Mountain Grassland by Oil Formulation of Metarhizium flavoviride

用绿僵菌油剂在新疆山地草原对蝗虫进行了防治试验。喷药后采样 ,罩笼饲养从第 3天开始感病死亡 ,第 5天死亡明显增多 ,第 6天绝大部分蝗虫死亡。该绿僵菌在自然条件下对试验区内的 5种蝗虫具有相同的感染致病力。田间防效在第 15天为 6 0 .9% ,第 18天为 73.7%。

Oil formulation of Metarhizium flavoviride was used for the control of grasshoppers in the mountain grassland, Xinjing. Cage test showed that mortality of grasshoppers infected with the fungus began at the third day after application and the majority of grasshoppers was killed on 6th day (1 h sample) or on 7th (48 h sample). There was no significant difference in mortality among the grasshopper species. Field population decreased steadily from 6th day after application and reached 60.9% at 15th day and 73.7% at 18th day.