scholarly journals Effects of Consumption of Bt-maize (MON 810) on the Collembolan Folsomia candida, Over Multiple Generations: A Laboratory Study

Insects ◽  
2011 ◽  
Vol 2 (2) ◽  
pp. 243-252 ◽  
Author(s):  
Gábor Bakonyi ◽  
Anna Dolezsai ◽  
Norbert Mátrai ◽  
András Székács
Keyword(s):  
Laboratory Study ◽  
Folsomia Candida ◽  
Bt Maize ◽  
Multiple Generations ◽  
Mon 810

Effects of Nitrogen Fertility on Bt Endotoxin Levels in Maize

2007 ◽  
Vol 42 (1) ◽  
pp. 35-43 ◽  
Author(s):  
H. Arnold Bruns ◽  
Craig A. Abel
Keyword(s):  
Growth Stage ◽  
Heliothis Zea ◽  
Larval Survival ◽  
Corn Earworm ◽  
Fertility Rates ◽  
Bt Maize ◽  
Tissue Samples ◽  
Corn Borer ◽  
N Fertility ◽  
Mon 810

Three Bt maize hybrids (two with Bt event MON-810, one with Bt event DBT-418) and one nonBt maize hybrid were grown at Stoneville, MS, USA in 2002 and 2003 with N-fertility rates of 0, 112, 224, and 336 kg N/ha, respectively. Tissue samples of the 7th leaf at growth stage V5 (5 fully extended leaves) and primary ear leaf sheaths and outer ear husks at growth stage R3 (milk) were collected and analyzed for endotoxin concentrations. At V5 CrylAb Bt concentrations of the MON-810 hybrids increased whereas there were no N-fertility effects on Cry1Ac in the DBT-418 hybrid. Bioassays from tissue samples at growth stage V5 of all N-fertility treatments for both Bt events were nearly 100% fatal to southwestern corn borer larvae (Diatraea grandiosella_Dyar). Endotoxin concentrations at growth stage R3 increased in both the primary ear leaf sheaths {[Bt] = 0.0006(kg N/ha) + 0.167 r2 = 0.8817 for both MON-810 and DBT-418} and outer ear husks {[Bt] = 0.0006(kg N/ha) + 0.148) r2 = 0.9985 and [Bt] = 0.0007 (kg N/ha) + 0.16) r2 = 0.8702 for MON-810 and DBT-418, respectively} as N fertilization increased in 2003. Bioassays determined that southwestern corn borers were susceptible to even the lowest [Bt] in tissues of MON-810 at R3 but not DBT-418. Diets made from the nonBt hybrid at all stages and N-fertility rates had a nearly 80.0% larval survival rate. Because other Noctuidae pests [i.e., corn earworm (Heliothis zea (Boddie)) and fall armyworm (Spodoptera frugiperda (J. E. Smith))] of corn are more tolerant to Bt toxins, growing Bt maize under adequate levels of N-fertility may be even more important to insure maximum protection from these pests.

scholarly journals The influence of genetically modified Bt maize MON 810 in feed mixtures on slaughter, haematological and biochemical indices of broiler chickens

2009 ◽  
Vol 18 (3) ◽  
pp. 490-498 ◽  
Author(s):  
V. Řehout ◽  
J. Kadlec ◽  
J. Čítek ◽  
E. Hradecká ◽  
L. Hanusová ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Genetically Modified ◽  
Bt Maize ◽  
Biochemical Indices ◽  
Mon 810

scholarly journals Effect of Bt Maize Mon 810 Expressing Cry 1 Ab Toxin on Aphidius Colemani in Tritrophic Plant - Herbivore - Parasitoid System

2008 ◽  
Vol 48 (1) ◽  
pp. 130-136 ◽  
Author(s):  
Julia Górecka ◽  
Monika Godzina ◽  
Zbigniew Dąbrowski
Keyword(s):  
Rhopalosiphum Padi ◽  
Population Level ◽  
Host Feeding ◽  
Genetically Modified Maize ◽  
Bt Maize ◽  
Aphidius Colemani ◽  
Maize Cultivar ◽  
Maize Plants ◽  
Plant Herbivore ◽  
Mon 810

Effect of Bt Maize Mon 810 Expressing Cry 1 Ab Toxin onAphidius Colemaniin Tritrophic Plant - Herbivore - Parasitoid SystemEffect of Bt maize MON 810 expressing Cry 1 Ab toxin on braconidAphidius colemaniin tritrophic plant - herbivore - parasitoid system was studied under greenhouse conditions by rearing the bird cherry-oat aphid (Rhopalosiphum padi) on genetically modified maize cultivar DKc 307 (MON 810) and its isogenic parent cultivar - Monumental of Monsanto Ltd.R. padiaphids reached higher population level when maintained on Bt-maize cultivar DKc 307 (MON 810) than on its isogenic parent cultivar - Monumental both in the winter and summer experiments. The braconidA. colemanideveloped higher population onR. padiaphid population feeding on Bt maize plants in the summer experiment and on non-Bt plants in the winter experiment. The observed effect of season on parasitation level byA. colemanionR. padihost feeding on Bt and non-Bt maize plants indicates that results obtained in a single greenhouse experiment may lead to questionable conclusions and should be confirmed by other experiments.

scholarly journals Toxicological and biochemical analyses demonstrate no toxic effect of Bt maize on the Folsomia candida

PLoS ONE ◽  
2020 ◽  
Vol 15 (5) ◽  
pp. e0232747
Author(s):  
Zhilei Jiang ◽  
Lin Zhou ◽  
Baifeng Wang ◽  
Daming Wang ◽  
Fengci Wu ◽  
...  
Keyword(s):  
Toxic Effect ◽  
Folsomia Candida ◽  
Bt Maize ◽  
Biochemical Analyses

scholarly journals EFICÁCIA DE TECNOLOGIAS DE MILHO Bt NO MANEJO DE LEPIDÓPTEROS-PRAGAS

2017 ◽  
Vol 16 (1) ◽  
pp. 22
Author(s):  
HALLISON VERNISIO VERTUAN ◽  
JOSÉ ROBERTO SALVADORI ◽  
WLADECIR SALLES DE OLIVEIRA ◽  
GERALDO UBIRAJARA BERGER
Keyword(s):  
Pest Management ◽  
Spodoptera Frugiperda ◽  
Genetically Modified ◽  
Field Trials ◽  
Yield Reduction ◽  
Genetically Modified Maize ◽  
Bt Maize ◽  
Maize Hybrids ◽  
Diatraea Saccharalis ◽  
Mon 810

 RESUMO - Spodoptera frugiperda e Diatraea saccharalis estão entre as principais pragas da cultura do milho, e suas injúrias podem acarretar diminuição do rendimento de grãos. Com o advento do milho Bt, são necessários estudos sobre estratégias de controle, para utilização no manejo integrado dessas pragas. Experimentos foram conduzidos em campo em quatro locais do Brasil na safra 2010/2011, com o objetivo de avaliar a eficácia de híbridos de milho geneticamente modificados contendo os eventos Bt MON 810, MON 89034 e MON 89034 × TC1507 × NK603, no manejo de S. frugiperda e D. saccharalis. Foram realizadas avaliações de injúrias foliares em quatro tempos distintos, utilizando-se escala, número de orifícios em colmos e avaliação do rendimento de grãos. As injúrias foliares ocasionadas por S. frugiperda foram menores nos híbridos com os eventos MON 89034 e MON 89034 × TC1507 × NK603, apresentando notas de injúrias entre 0 a 1,5, e dependendo do estádio de avaliação e local diferiram significativamente do evento MON 810. Os híbridos geneticamente modificados também tiveram menores injúrias no colmo ocasionadas por D. saccharalis. Considerando a média dos campos experimentais, os híbridos com evento Bt apresentaram um rendimento significativamente superior ao convencional, na ordem de 750 a 900 kg/ha.Palavras-chave: Spodoptera frugiperda, Diatraea saccharalis, manejo de pragas.EFFICACY OF Bt MAIZE TECHNOLOGIES IN LEPIDOPTERAN PESTS MANAGEMENTABSTRACT - Spodoptera frugiperda and Diatraea saccharalis are the main maize pests and their injuries may cause yield reduction. The advent of Bt maize show that studies are required to evaluate tactical of control within integrated pest management. Field trials were conducted in four locations in Brazil during crop season 2010/2011, in order to evaluate the effectiveness of genetically modified maize hybrids containing the Bt events MON 810, MON 89034 and MON 89034 × NK603 × TC1507, in management of S. frugiperda and D. saccharalis. Leaf injuries were performed in four different times, using scale, number of holes and yield evaluation. Leaf injuries caused by S. frugiperda were lower in maize hybrids expressing the events MON 89034 and MON 89034 × TC1507 × NK603 with rates between 0 to 1.5, depending on evaluation stage, and location differed significantly from MON 810 event. The genetically modified maize hybrids also reduced stalk injuries caused by D. saccharalis. Considering the average of the experimental fields, the Bt hybrids presented a significantly higher yield than the conventional in the range of 750 to 900 kg/ha.Keywords: Spodoptera frugiperda, Diatraea saccharalis, pest management.

scholarly journals Diversity of carabid beetles (Coleoptera: Carabidae) under three different control strategies against European corn borer in maize

2013 ◽  
Vol 49 (No. 3) ◽  
pp. 146-153 ◽  
Author(s):  
F. Kocourek ◽  
P. Saska ◽  
M. Řezáč
Keyword(s):  
European Corn Borer ◽  
Control Strategies ◽  
Carabid Beetles ◽  
Bt Maize ◽  
Corn Borer ◽  
Focal Treatment ◽  
Cropping Seasons ◽  
The Impact ◽  
Insect Resistant ◽  
Mon 810

We compared three control strategies against European corn borer (Ostrinia nubilalis Hubner) in maize with respect to carabid beetles, beneficial epigeal arthropods. The impact of the focal treatment (insect resistant Bt maize MON 810) was compared with conventionally farmed and Trichogramma-treated plots at two sites (Prague-Ruzyně and Ivanovice na Hané) in the Czech Republic, replicated in three cropping seasons (2002–2004). The sampled assemblages were species-poor. The species were unevenly distributed in terms of their catch size – the communities were dominated by 7 (Ruzyně) or 3 (Ivanovice) species. No differences were found in species richness or species composition between treatments, seasons or sites, suggesting no effect of planting transgenic insect resistant Bt maize MON 810 on the assemblages of carabid beetles in the study fields.  

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