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Farm-scale evaluation of the impact of Cry1Ab Bt maize on canopy non-target arthropods: a three-year study

Otros títulosImpact of Bt maize on canopy NTAs
AutorArias-Martín, María; García, Matías ; Castañera, Pedro ; Ortego, Félix ; Farinós, Gema P.
Palabras claveCicadellidae
Risk assessment,
Surrogate species
Zyginidia scutellaris
Fecha de publicación11-ago-2016
EditorJohn Wiley & Sons
CitaciónInsect Science (2016)
ResumenThe cultivation of Cry1Ab-expressing genetically modified MON810 (Bt maize) has led to public concern in Europe, regarding its impact on non-target arthropods (NTAs). We have assessed the potential effects of DKC 6451 YG (MON810) maize on canopy NTAs in a farm-scale study performed in Central Spain during three years. The study focused on hemipteran herbivores (leafhoppers and planthoppers) and hymenopteran parasitic wasps (mymarids) collected by yellow sticky traps, which accounted for 72% of the total number of insects studied. The dynamics and abundance of these groups varied among years, but no significant differences were found between Bt and non-Bt maize, indicating that Bt maize had no negative effect on these taxa. Nonetheless, the Cry1Ab toxin was detected in two different arthropods collected from Bt maize foliage, the cicadellids Zyginidia scutellaris and Empoasca spp. A retrospective power analysis on the arthropod abundance data for our field trials has determined that Z. scutellaris and the family Mymaridae have high capacity to detect differences between the Bt maize and its isogenic counterpart. The use of these canopy NTAs as surrogates for assessing environmental impacts of Bt maize is discussed.
Descripción21 p.-2 fig.-2 tab.
Versión del editorhttp://dx.doi.org/ 10.1111/1744-7917.12378
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