There are currently 402 studies in the GENERA database.

Advanced Search

General Information

Document type
  • Peer-reviewed journal article
GE organism
  • maize
GE trait
  • insect resistance
Country
  • USA

Results

Efficacy
  • positive effect
Safety for environment
  • positive effect

Impact of transgenic VIP3A × Cry1Ab lepidopteran-resistant field corn on the nontarget arthropod community

Dively GP
Environmental Entomology. 2005 October. 34(5):1267-1291

Link to full text (journal may charge for access)

DOI: 10.1603/0046-225X(2005)034[1267:IOTVCL]2.0.CO;2 ISSN: 0046-225X

Abstract

A field experiment was conducted over 3 yr to assess the effects of transgenic field corn expressing stacked lepidopteran-active Bacillus thuringiensis (Bt)-derived VIP3A and Cry1Ab proteins on nontarget arthropods. Effects were compared with an isogenic conventional corn hybrid treated with a foliar insecticide and an isogenic control without insecticides. Plant inspections, pitfall traps, sticky cards, and emergence traps determined the abundance and diversity of plant, aerial, and surface-dwelling communities. More than 500,000 arthropods were enumerated, representing 203 taxonomic groups in 112 families and 13 orders. In terms of abundance, 70% of the arthropods were saprovores, 13% were herbivorous insects, 14% were predators, and 3% were parasitoids. Overall biodiversity and community-level responses were not significantly affected by expression of the stacked VIP3A and Cry1Ab proteins. Densities of most nontarget taxa exposed to the Bt hybrid showed no differences compared with the isogenic control. However, significant changes in certain taxa did occur in the Bt plots, which were indirectly related to plant-mediated factors, prey density responses, and the absence of plant injury. Arthropod communities in the insecticide-treated plots displayed both negative and positive changes in the abundances of individual taxa. Together, effects observed in the Bt plots were significantly less than the community disturbances caused by insecticide applications. Changes in nontarget communities in plots previously exposed to insecticides and the Bt hybrid did not carryover to the following growing season. Major arthropods as bioindicators, routes of exposures, and food web interactions relative to the observed effects are discussed.

Keywords

Bacillus thuringiensis corn, nontarget effects, VIP3A, Cry1Ab, principal response curves

Funding

Funding source
  • Maryland Agriculture Experiment Station
  • Syngenta
Funding country
  • United States
Funding type
  • government
  • industry: same

Links to outside analysis of this resource

Please contact us if you know of an independent summary or analysis of this resource.

Cite this study

MLA

Dively GP. "Impact of transgenic VIP3A × Cry1Ab lepidopteran-resistant field corn on the nontarget arthropod community." Environmental Entomology 34.5 (2005): 1267-1291. Web. 25 Jul. 2017.

APA

Dively GP. (2005). Impact of transgenic VIP3A × Cry1Ab lepidopteran-resistant field corn on the nontarget arthropod community. Environmental Entomology, 34(5), 1267-1291. doi:10.1603/0046-225X(2005)034[1267:IOTVCL]2.0.CO;2

Please verify citations before use, citations are automatically generated based on information stored within the GENERA database and therefore may or may not be correct.