取食不同品种棉花的棉蚜对龟纹瓢虫功能反应的影响  

Effect of cotton aphids feeding on transgenic cotton varieties on the behavior of Propylaea japonica

作　　者：谢修庆[1] 陆佩玲[1] 胡蒙蒙[1] 苏宏华[1] 杨益众[1] 

机构地区：[1]扬州大学园艺与植物保护学院,扬州225009

出　　处：《应用昆虫学报》2012年第4期911-916,共6页Chinese Journal of Applied Entomology

基　　金：国家重大转基因项目(2011ZX08012-004)

摘　　要：本文以GK12、33B和SGK321 3种转基因棉和对应的3种常规棉泗棉3号、33及石远321为材料,通过室内测定,研究了取食转基因棉的棉蚜Aphis gossypii Glover对龟纹瓢虫Propylaea japonica Thunberg 1～4龄幼虫功能反应的影响。结果指出,龟纹瓢虫对来自转基因棉田蚜虫的捕食量大多高于常规棉田,且捕食量随猎物密度的增加而增大。在1、2龄幼虫期,龟纹瓢虫取食转双价基因棉田蚜虫的数量多高于取食转单价基因棉田的蚜虫数量,但是在3、4龄幼虫时,龟纹瓢虫取食转双价棉田蚜虫的数量多低于取食转单价棉田的蚜虫数量。龟纹瓢虫对来自转基因棉田棉蚜的捕食功能反应符合HollingⅡ型。龟纹瓢虫1龄幼虫取食GK12和SGK321 2个转基因棉田蚜虫的最大日捕食量大于对照,处理时间短于对照;龟纹瓢虫P.japonica 2、3龄幼虫取食33B和SGK321 2个转基因棉田蚜虫A.gossypii的日最大捕食量大于对照,处理时间短于对照;4龄时取食转基因棉田蚜虫的数量都大于对照,处理时间均短于对照,其中取食转双价基因棉SGK321棉田蚜虫的日最大捕食量小于取食单价棉田蚜虫的日最大捕食量。The effect of Aphid gossypii Glover feeding on the transgenic cotton varieties GK12, 33B and SGK321 and conventional cotton varieties Simian3, 33 and Shiyuan321, on the predatory behavior of Propylaea japonica Thunberg larvae was investigated. The results show that the relative biomass of P. japonica to A. gossypii was higher on transgenic cotton than on conventional cotton and that the number of P. japonica increased with prey density. More A. gossypii were preyed on by 1st and 2nd instar larvae of P. japonica on SGK321 than on GK12 and 33B. Conversely, more A. gossypii were preyed on by 3rd and 4th instar larvae of P. japonica on GK12 and 33B plants than on SGK321 plants. The predatory responses of P. japonica to A. gossypii feeding on transgenic cotton fitted the Holling - II equation. The maximum daily predation rate of 1st instar P. japonica larvae on A. gossypii was higher on GK 12 and SGK321 plants than on control plants and processing time was shorter than on control plants. The maximum daily predation rate of 2nd and 3rd instar P. japonica larvae was higher on 33B and SGK321 plants and processing time was shorter compared to control plants. The maximum daily predation rates of 4th instar larvae on all three transgenic cotton varieties were greater than those of larvae on control plants, and processing time was shorter than on control plants. In addition, the maximum daily predation rate of P. japonica on the dual toxin transgenic cotton SGK321 was less than that on the single toxin varieties GK12 and 33B.

关 键 词：转基因棉 棉蚜 龟纹瓢虫 功能反应 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治]