应用微孢子虫控制青海草地土蝗的研究  

A STUDY OF CONTROLLING GRASSLAND ACRIDIDAE WITH NOSEMA LOCUSTAE

作　　者：李韬[1] 阎省三 王贵林[1] 王薇娟[1] 刘晓健[1] 李卫民[1] 乔安海[1] 葛绍荣[1] 

机构地区：[1]青海省草原总站,四川大学生物工程系

出　　处：《四川大学学报（自然科学版）》1994年第4期556-562,共7页Journal of Sichuan University(Natural Science Edition)

摘　　要：于１９８７～１９９１年引入蝗虫微孢子虫（ＮｏｓｅｍａＬｏｃｕｓｔａｅ简称Ｎ．Ｌ）对草地土蝗进行了防治试验。结果表明：室养东亚飞蝗接种后可以大量增殖Ｎ。Ｌ产孢量为１．１７×１０￣９孢子／虫，室养青海土蝗产孢量为４．１×１０￣６孢子／虫；大面积防治，青海草地土蝗的７个主要种均可感染Ｎ．Ｌ每６．７ａ有效浓度（０．５～１．０）×１０￣９孢子／ｍＬ其感染率为８６．６７％～９０．００％，感染的高峰出现在接种后的第２５～３５ｄ，校正虫口减退率，小区为６５．０７％～７１．７２％，大面积为７６．６２％；Ｎ．Ｌ在１０℃放置７２ｈ和光照４８ｈ后感染能力无明显影响，Ｎ．Ｌ啧施后次年的垂直感染率平均为３８％，感染后土蝗产卵量平均下降６８．４％。The experiment had been done wnich in controlling grassland acrididae by usingNosema locustae(abbreviated as N. L)during 1987～1991. the infection rate of inoculated locustaemigatoria manileusis raised in laboratory, the produced quantity of N. L is 1.17×10￣9 spore per ainsect.Qinghai grassland acrididae body is little, the produced quantity of N. L is 0.41×10￣9 per ainsect. In the large scale controlling , the seven main species of Qinghai grassland acridltiae can beinfected by N. L,the proper concentration is between 0. 5 by 10￣9 to 1 by 10￣9 spore per mL , theinfection rate is coming up to 86. 67 ～ 90. 00 per cent , the infection peak comes up after 25 ～ 35days of incubation,the revision insect reduced rate is between 65. 07～71. 72% in plot experiment,76. 62%in large-scale controlling;the infection power is almost not affected after 72 hours trcatinghthe condition of 10℃or 4 8 hours in the natural light; After spraying N.L, the second yearsaverage continuous infection rate is 3 8%; the produced quantity of the infection pest averagereduction is 68.4%。

关 键 词：草地土蝗 蝗虫微孢子虫 感染率 

分 类 号：S432.1[农业科学—植物病理学]