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General Information

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

Results

Safety for environment
  • negative effect

Field deposition of Bt transgenic corn pollen: lethal effects on the monarch butterfly

Jesse, LCH; Obrycki, JJ
Oecologia. 2000 October. 125(2):241-248

Link to full text (journal may charge for access)

DOI: 10.1007/s004420000502 ISSN: 1432-1939

Abstract

We present the first evidence that transgenic Bacillus thuringiensis (Bt) corn pollen naturally deposited on Asclepias syriaca; common milkweed, in a corn field causes significant mortality of Danaus plexippus L. (Lepidoptera: Danaidae) larvae. Larvae feeding for 48 h on A. syriaca plants naturally dusted with pollen from Bt corn plants suffered significantly higher rates of mortality at 48 h (20±3%) compared to larvae feeding on leaves with no pollen (3±3%), or feeding on leaves with non-Bt pollen (0%). Mortality at 120 h of D. plexippus larvae exposed to 135 pollen grains/cm2 of transgenic pollen for 48 h ranged from 37 to 70%. We found no sub-lethal effects on D. plexippus adults reared from larvae that survived a 48-h exposure to three concentrations of Bt pollen. Based on our quantification of the wind dispersal of this pollen beyond the edges of agricultural fields, we predict that the effects of transgenic pollen on D. plexippus may be observed at least 10 m from transgenic field borders. However, the highest larval mortality will likely occur on A. syriaca plants in corn fields or within 3 m of the edge of a transgenic corn field. We conclude that the ecological effects of transgenic insecticidal crops need to be evaluated more fully before they are planted over extensive areas.

Keywords

Danaus plexippus, Bacillus thuringiensis, Bt corn, Transgenic pollen, Risk assessment

Funding

Funding source
  • State of Iowa
  • Environmental Protection Agency STAR Fellowship
  • Hatch Act
Funding country
  • United States
Funding type
  • government

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Cite this study

MLA

Jesse, LCH, JJ Obrycki. "Field deposition of Bt transgenic corn pollen: lethal effects on the monarch butterfly." Oecologia 125.2 (2000): 241-248. Web. 20 Nov. 2017.

APA

Jesse, LCH., & Obrycki, JJ. (2000). Field deposition of Bt transgenic corn pollen: lethal effects on the monarch butterfly. Oecologia, 125(2), 241-248. doi:10.1007/s004420000502

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.