Impact of Colorado potato beetle-resistant potatoes on non-target arthropods: A meta-analysis of factors potentially involved in the failure of a Bt transgenic plant

被引:9
作者
Cloutier, Conrad [1 ]
Boudreault, Simon [1 ]
Michaud, Dominique [2 ]
机构
[1] Univ Laval, Dept Biol, Fac Sci & Genie, Quebec City, PQ G1V 0A6, Canada
[2] Univ Laval, Dept Phytol, Pavillon Serv INAF, Quebec City, PQ G1V 0A6, Canada
关键词
Solanum tuberosum; non-target effects; pest resistance; transgenic plants;
D O I
10.1684/agr.2008.0213
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
The relatively high specificity of transgenic plants based on Cry toxins of Bacillus thuringiensis (Bt) implies the possibility of upward agroecosystemic cascades toward new equilibria among arthropods associating with cultivated plants. We examine the hypothesis that exclusion of the Colorado potato beetle from potato expressing the Cry3a toxin increases the abundance of non-target herbivores, which indirectly favours the abundance of herbivore-dependent predators and omnivores foraging on agricultural plants. We examined the impact of Bt potato on non-target arthropod taxa, based on impact studies conducted during development of the Newleaf(R) Bt potato in North America. Of 32 field tests comparing Bt potato to non-transgenic controls, 14 (42%) revealed a significant, positive effect on the abundance of sucking insects (aphids, leathoppers, mirids, thrips). Among 72 tests on generalist predators that were simultaneously monitored, 14 (similar to 20%) also revealed significant positive effects. Such positive effects on predators can best be explained by their abundance being increased as a result of greater productivity due to overabundance of sucking insect prey, which are selectively favoured by the high specificity of the Cry3a Bt toxin. Our results support the idea that development of the Bt potato may have been hampered in part by its positive effects on sucking insect pests, and underline the importance of conserving the natural enemies of secondary pests that are indirectly favoured.
引用
收藏
页码:388 / 394
页数:7
相关论文
共 24 条
[1]  
[Anonymous], 1996, Biological Control
[2]   Recombinant and classically selected factors of potato plant resistance to the Colorado potato beetle, Leptinotarsa decemlineata, variously affect the potato aphid parasitoid Aphidius nigripes [J].
Ashouri, A ;
Michaud, D ;
Cloutier, C .
BIOCONTROL, 2001, 46 (04) :401-418
[3]   Unexpected effects of different potato resistance factors to the Colorado potato beetle (Coleoptera: Chrysomelidae) on the potato aphid (Homoptera: Aphididae) [J].
Ashouri, A ;
Michaud, D ;
Cloutier, C .
ENVIRONMENTAL ENTOMOLOGY, 2001, 30 (03) :524-532
[4]  
ASHOURI A, 1999, THESIS U LAVAL QUEBE
[5]   Oryzacystatin I expressed in transgenic potato induces digestive compensation in an insect natural predator via its herbivorous prey feeding on the plant [J].
Bouchard, É ;
Cloutier, C ;
Michaud, D .
MOLECULAR ECOLOGY, 2003, 12 (09) :2439-2446
[6]   Molecular interactions between an insect predator and its herbivore prey on transgenic potato expressing a cysteine proteinase inhibitor from rice [J].
Bouchard, E ;
Michaud, D ;
Cloutier, C .
MOLECULAR ECOLOGY, 2003, 12 (09) :2429-2437
[7]   The release of genetically modified crops into the environment - Part II. Overview of ecological risk assessment [J].
Conner, AJ ;
Glare, TR ;
Nap, JP .
PLANT JOURNAL, 2003, 33 (01) :19-46
[8]  
DAILY GC, 1997, ISSUES ECOL, V2, P1
[9]   Effects of transgenic Bacillus thuringiensis potato and conventional insecticides for Colorado potato beetle (Coleoptera: Chrysomelidae) management on the abundance of ground-dwelling arthropods in Oregon potato ecosystems [J].
Duan, JJ ;
Head, G ;
Jensen, A ;
Reed, G .
ENVIRONMENTAL ENTOMOLOGY, 2004, 33 (02) :275-281
[10]   Insect-resistant transgenic plants in a multi-trophic context [J].
Groot, AT ;
Dicke, M .
PLANT JOURNAL, 2002, 31 (04) :387-406