Effekte des Anbaus von Bt-Mais auf Nichtzielarthropoden der Krautschichtfauna : Monitoringorganismen und praktikable Erfassungsmethoden
type: CreativeWork
description: A 3-year study (2001-2003) was conducted to determine possible unintended effects of Bt-maize (Mon810, cultivar Novelis) cultivation on nontarget organisms of the arthropod community compared with an isogenic maize line (cultivar Nobilis) with and without an insecticide treatment. Furthermore, suitable monitoring organisms and appropriate methods are recommended for Post Market Environmental Monitoring. The experimental site was situated near Bonn (Germany) and consisted of two maize fields divided into 24 plots (8 per treatment). Maintenance of the field was as customary at this site. Five different methods were adopted (samples of maize cobs, sweep net catching, visual assessments, coloured traps and jarring samples of maize panicles) in order to measure the abundance of a wide ecological spectrum of non-target herb layer arthropods. Additionally a monitoring especially aligned on cicadas as possible monitoring organisms was performed. Seven statistically significant differences in nontarget-arthropod abundance between Bt-maize and the isogenic control concerning one predator and four different herbivores were observed in this study. At single sampling dates spiders, thrips and the beetle Cortinicara gibbosa were found in significantly higher abundances in Bt maize than in the isogenic control. In 2002, at two sampling dates, cicadas were more abundant in Bt maize than in the isogenic control. A significantly lower abundance in Bt maize compared to the isogenic control was found at single sampling dates for the aphid Sitobion avenae and thrips. The results of this study indicate no biological relevant effect of the Bt maize cultivar Mon810 on nontarget arthropods compared to conventional maize. 90 statistically significant differences in arthropod abundance, caused by the application of chemical insecticide, were detected with different methods. 46 times the abundance of an arthropod taxon was significantly different in the insecticide treated plots and in Bt maiz…
abstract: A 3-year study (2001-2003) was conducted to determine possible unintended effects of Bt-maize (Mon810, cultivar Novelis) cultivation on nontarget organisms of the arthropod community compared with an isogenic maize line (cultivar Nobilis) with and without an insecticide treatment. Furthermore, suitable monitoring organisms and appropriate methods are recommended for Post Market Environmental Monitoring. The experimental site was situated near Bonn (Germany) and consisted of two maize fields divided into 24 plots (8 per treatment). Maintenance of the field was as customary at this site. Five different methods were adopted (samples of maize cobs, sweep net catching, visual assessments, coloured traps and jarring samples of maize panicles) in order to measure the abundance of a wide ecological spectrum of non-target herb layer arthropods. Additionally a monitoring especially aligned on cicadas as possible monitoring organisms was performed. Seven statistically significant differences in nontarget-arthropod abundance between Bt-maize and the isogenic control concerning one predator and four different herbivores were observed in this study. At single sampling dates spiders, thrips and the beetle Cortinicara gibbosa were found in significantly higher abundances in Bt maize than in the isogenic control. In 2002, at two sampling dates, cicadas were more abundant in Bt maize than in the isogenic control. A significantly lower abundance in Bt maize compared to the isogenic control was found at single sampling dates for the aphid Sitobion avenae and thrips. The results of this study indicate no biological relevant effect of the Bt maize cultivar Mon810 on nontarget arthropods compared to conventional maize. 90 statistically significant differences in arthropod abundance, caused by the application of chemical insecticide, were detected with different methods. 46 times the abundance of an arthropod taxon was significantly different in the insecticide treated plots and in Bt maiz…
author: Eckert, Jörg
language: ger
keywords: info:eu-repo/classification/ddc/570, Biowissenschaften, Biologie, Mais, Maisanbau, Gentechnologie, Gliederfüßer, Bacillus thuringiensis, Bt-Mais, Nichtzielorganismen, Arthropoden, Monitoring, Bt-maize, Arthropods, nontarget
date published: 2006
date modified: 2026-07-30T19:43:28Z
provider: RWTH Aachen University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Publikationsserver der RWTH Aachen University