摘要
在锡林浩特草场分别以6.0×107孢子.m-2施用量的绿僵菌Metarhiziumanisopliae油悬浮剂、绿僵菌饵剂进行喷洒,调查绿僵菌在田间蝗虫中的流行、对寄生蝇寄生蝗虫的影响。结果表明,施用绿僵菌后,蝗虫种群分别于20d和60d出现2次感病高峰;处理后20d绿僵菌油悬浮剂和绿僵菌饵剂对蝗虫的感染率分别为54.55%和34.79%,绿僵菌油悬浮剂对蝗虫的感染率显著高于绿僵菌饵剂;处理后60d其感染率分别为23.62%和32.60%,绿僵菌饵剂对蝗虫的感染率显著高于绿僵菌油悬浮剂。说明绿僵菌油悬浮剂作用速度快于绿僵菌饵剂;绿僵菌饵剂持效性高于绿僵菌油悬浮剂;绿僵菌可以自然流行于该地区的蝗虫种群。绿僵菌孢子通过蝗虫病原地的二次流行,可向其周围环境扩散传播。表现出随着与绿僵菌饵剂处理区的距离增加,感染率逐渐降低;随着病原流行时间的延长,感病率逐渐升高。绿僵菌的侵染与寄生蝇的寄生无关,二者对蝗虫种群的作用为各自独立,其效果是二者的累加。
The grasshopper population showed two pathogenetic peaks after 20 d and 60 d of treatment by Metarhizium anisopliae conidia supplemented with oil-based suspension and bait.On the 20th d after treatment,the infectious rates with oil-based suspension and bait treatments rose to 54.5% and 34.79%,respectively, and difference between the treatments was significant.On the 60th d after treatment,the infected rates with both the treatments dropped to 23.62% and 32.60%,respectively,and difference between treatments was also significant.The result indicated that the action of the oil-based suspension was faster than that of the bait,and the effect of the bait was more durative than that of the oil-based suspension.M.anisopliae might prevail naturally among the grasshopper population in this area.Infection of grasshoppers by M.anisopliae was independent on parasitic flies,suggesting that roles of biological control of grasshoppers by M.anisopliae and parasitic flies were additive.
出处
《中国生物防治学报》
CSCD
北大核心
2011年第1期50-54,共5页
Chinese Journal of Biological Control
基金
"十一五"国家科技支撑计划(2006BAD16B0421)
公益性行业科研专项(201003079)
关键词
绿僵菌
蝗虫
扩散传播
寄生蝇
生物防治
Metarhizium anisopliae
grasshopper
spread and diffusion
parasitic flies
biological control
