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Cross-Pollination of Nontransgenic Corn Ears with Transgenic Bt Corn: Efficacy Against Lepidopteran Pests and Implications for Resistance Management

The efficacy of nontransgenic sweet corn, Zea mays L., hybrids cross-pollinated by Bacillus thuringiensis (Bt) sweet corn hybrids expressing Cry1Ab toxin was evaluated in both field and laboratory studies in Minnesota in 2000. Non-Bt and Bt hybrids (maternal plants) were cross-pollinated with pollen... Full description

Journal Title: Journal of economic entomology 2011, Vol.104 (5), p.1476-1479
Main Author: Burkness, E. C
Other Authors: O'Rourke, P. K , Hutchison, W. D
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: Lanham, MD: Entomological Society of America
ID: ISSN: 0022-0493
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recordid: cdi_proquest_miscellaneous_954660692
title: Cross-Pollination of Nontransgenic Corn Ears with Transgenic Bt Corn: Efficacy Against Lepidopteran Pests and Implications for Resistance Management
format: Article
creator:
  • Burkness, E. C
  • O'Rourke, P. K
  • Hutchison, W. D
subjects:
  • Animals
  • Bacillus thuringiensis
  • Bacillus thuringiensis - genetics
  • Bacterial Proteins - genetics
  • Bacterial Proteins - metabolism
  • Biological and medical sciences
  • Control
  • Cross-pollination
  • Cry1Ab toxin
  • Endotoxins - genetics
  • Endotoxins - metabolism
  • Fundamental and applied biological sciences. Psychology
  • Generalities
  • Helicoverpa zea
  • Hemolysin Proteins - genetics
  • Hemolysin Proteins - metabolism
  • Insecta
  • Insecticide Resistance
  • Invertebrates
  • Kernels
  • Larva
  • Lepidoptera
  • Minnesota
  • Moths - physiology
  • Ostrinia nubilalis
  • Pest Control, Biological - methods
  • Pests
  • Phytopathology. Animal pests. Plant and forest protection
  • Plants, Genetically Modified - genetics
  • Pollen
  • Pollination
  • Protozoa. Invertebrates
  • RAPID COMMUNICATION
  • resistance management
  • Survival
  • Zea mays
  • Zea mays - genetics
ispartof: Journal of economic entomology, 2011, Vol.104 (5), p.1476-1479
description: The efficacy of nontransgenic sweet corn, Zea mays L., hybrids cross-pollinated by Bacillus thuringiensis (Bt) sweet corn hybrids expressing Cry1Ab toxin was evaluated in both field and laboratory studies in Minnesota in 2000. Non-Bt and Bt hybrids (maternal plants) were cross-pollinated with pollen from both non-Bt and Bt hybrids (paternal plants) to create four crosses. Subsequent crosses were evaluated for efficacy in the field against European corn borer, Ostrinia nubilalis (Hübner), and corn earworm, Helicoverpa zea (Boddie), and in laboratory bioassays against O. nubilalis. Field studies indicated that crosses with maternal Bt plants led to low levels of survival for both O. nubilalis and H. zea compared with the non-Bt × non-Bt cross. However, the cross between non-Bt ears and Bt pollen led to survival rates of 43 and 63% for O. nubilalis and H. zea larvae, respectively. This intermediate level of survival also was reflected in the number of kernels damaged. Laboratory bioassays for O. nubilalis, further confirmed field results with larval survival on kernels from the cross between non-Bt ears and Bt pollen reaching 60% compared with non-Bt crossed with non-Bt. These results suggest that non-Bt refuge plants, when planted in proximity to Bt plants, and cross-pollinated, can result in sublethal exposure of O. nubilalis and H. zea larvae to Bt and may undermine the high-dose / refuge resistance management strategy for corn hybrids expressing Cry1Ab.
language: eng
source:
identifier: ISSN: 0022-0493
fulltext: no_fulltext
issn:
  • 0022-0493
  • 1938-291X
url: Link


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titleCross-Pollination of Nontransgenic Corn Ears with Transgenic Bt Corn: Efficacy Against Lepidopteran Pests and Implications for Resistance Management
creatorBurkness, E. C ; O'Rourke, P. K ; Hutchison, W. D
creatorcontribBurkness, E. C ; O'Rourke, P. K ; Hutchison, W. D
descriptionThe efficacy of nontransgenic sweet corn, Zea mays L., hybrids cross-pollinated by Bacillus thuringiensis (Bt) sweet corn hybrids expressing Cry1Ab toxin was evaluated in both field and laboratory studies in Minnesota in 2000. Non-Bt and Bt hybrids (maternal plants) were cross-pollinated with pollen from both non-Bt and Bt hybrids (paternal plants) to create four crosses. Subsequent crosses were evaluated for efficacy in the field against European corn borer, Ostrinia nubilalis (Hübner), and corn earworm, Helicoverpa zea (Boddie), and in laboratory bioassays against O. nubilalis. Field studies indicated that crosses with maternal Bt plants led to low levels of survival for both O. nubilalis and H. zea compared with the non-Bt × non-Bt cross. However, the cross between non-Bt ears and Bt pollen led to survival rates of 43 and 63% for O. nubilalis and H. zea larvae, respectively. This intermediate level of survival also was reflected in the number of kernels damaged. Laboratory bioassays for O. nubilalis, further confirmed field results with larval survival on kernels from the cross between non-Bt ears and Bt pollen reaching 60% compared with non-Bt crossed with non-Bt. These results suggest that non-Bt refuge plants, when planted in proximity to Bt plants, and cross-pollinated, can result in sublethal exposure of O. nubilalis and H. zea larvae to Bt and may undermine the high-dose / refuge resistance management strategy for corn hybrids expressing Cry1Ab.
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languageeng
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subjectAnimals ; Bacillus thuringiensis ; Bacillus thuringiensis - genetics ; Bacterial Proteins - genetics ; Bacterial Proteins - metabolism ; Biological and medical sciences ; Control ; Cross-pollination ; Cry1Ab toxin ; Endotoxins - genetics ; Endotoxins - metabolism ; Fundamental and applied biological sciences. Psychology ; Generalities ; Helicoverpa zea ; Hemolysin Proteins - genetics ; Hemolysin Proteins - metabolism ; Insecta ; Insecticide Resistance ; Invertebrates ; Kernels ; Larva ; Lepidoptera ; Minnesota ; Moths - physiology ; Ostrinia nubilalis ; Pest Control, Biological - methods ; Pests ; Phytopathology. Animal pests. Plant and forest protection ; Plants, Genetically Modified - genetics ; Pollen ; Pollination ; Protozoa. Invertebrates ; RAPID COMMUNICATION ; resistance management ; Survival ; Zea mays ; Zea mays - genetics
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0Cross-Pollination of Nontransgenic Corn Ears with Transgenic Bt Corn: Efficacy Against Lepidopteran Pests and Implications for Resistance Management
1Journal of economic entomology
addtitleJ Econ Entomol
descriptionThe efficacy of nontransgenic sweet corn, Zea mays L., hybrids cross-pollinated by Bacillus thuringiensis (Bt) sweet corn hybrids expressing Cry1Ab toxin was evaluated in both field and laboratory studies in Minnesota in 2000. Non-Bt and Bt hybrids (maternal plants) were cross-pollinated with pollen from both non-Bt and Bt hybrids (paternal plants) to create four crosses. Subsequent crosses were evaluated for efficacy in the field against European corn borer, Ostrinia nubilalis (Hübner), and corn earworm, Helicoverpa zea (Boddie), and in laboratory bioassays against O. nubilalis. Field studies indicated that crosses with maternal Bt plants led to low levels of survival for both O. nubilalis and H. zea compared with the non-Bt × non-Bt cross. However, the cross between non-Bt ears and Bt pollen led to survival rates of 43 and 63% for O. nubilalis and H. zea larvae, respectively. This intermediate level of survival also was reflected in the number of kernels damaged. Laboratory bioassays for O. nubilalis, further confirmed field results with larval survival on kernels from the cross between non-Bt ears and Bt pollen reaching 60% compared with non-Bt crossed with non-Bt. These results suggest that non-Bt refuge plants, when planted in proximity to Bt plants, and cross-pollinated, can result in sublethal exposure of O. nubilalis and H. zea larvae to Bt and may undermine the high-dose / refuge resistance management strategy for corn hybrids expressing Cry1Ab.
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1Bacillus thuringiensis
2Bacillus thuringiensis - genetics
3Bacterial Proteins - genetics
4Bacterial Proteins - metabolism
5Biological and medical sciences
6Control
7Cross-pollination
8Cry1Ab toxin
9Endotoxins - genetics
10Endotoxins - metabolism
11Fundamental and applied biological sciences. Psychology
12Generalities
13Helicoverpa zea
14Hemolysin Proteins - genetics
15Hemolysin Proteins - metabolism
16Insecta
17Insecticide Resistance
18Invertebrates
19Kernels
20Larva
21Lepidoptera
22Minnesota
23Moths - physiology
24Ostrinia nubilalis
25Pest Control, Biological - methods
26Pests
27Phytopathology. Animal pests. Plant and forest protection
28Plants, Genetically Modified - genetics
29Pollen
30Pollination
31Protozoa. Invertebrates
32RAPID COMMUNICATION
33resistance management
34Survival
35Zea mays
36Zea mays - genetics
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titleCross-Pollination of Nontransgenic Corn Ears with Transgenic Bt Corn: Efficacy Against Lepidopteran Pests and Implications for Resistance Management
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4Bacterial Proteins - metabolism
5Biological and medical sciences
6Control
7Cross-pollination
8Cry1Ab toxin
9Endotoxins - genetics
10Endotoxins - metabolism
11Fundamental and applied biological sciences. Psychology
12Generalities
13Helicoverpa zea
14Hemolysin Proteins - genetics
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17Insecticide Resistance
18Invertebrates
19Kernels
20Larva
21Lepidoptera
22Minnesota
23Moths - physiology
24Ostrinia nubilalis
25Pest Control, Biological - methods
26Pests
27Phytopathology. Animal pests. Plant and forest protection
28Plants, Genetically Modified - genetics
29Pollen
30Pollination
31Protozoa. Invertebrates
32RAPID COMMUNICATION
33resistance management
34Survival
35Zea mays
36Zea mays - genetics
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abstractThe efficacy of nontransgenic sweet corn, Zea mays L., hybrids cross-pollinated by Bacillus thuringiensis (Bt) sweet corn hybrids expressing Cry1Ab toxin was evaluated in both field and laboratory studies in Minnesota in 2000. Non-Bt and Bt hybrids (maternal plants) were cross-pollinated with pollen from both non-Bt and Bt hybrids (paternal plants) to create four crosses. Subsequent crosses were evaluated for efficacy in the field against European corn borer, Ostrinia nubilalis (Hübner), and corn earworm, Helicoverpa zea (Boddie), and in laboratory bioassays against O. nubilalis. Field studies indicated that crosses with maternal Bt plants led to low levels of survival for both O. nubilalis and H. zea compared with the non-Bt × non-Bt cross. However, the cross between non-Bt ears and Bt pollen led to survival rates of 43 and 63% for O. nubilalis and H. zea larvae, respectively. This intermediate level of survival also was reflected in the number of kernels damaged. Laboratory bioassays for O. nubilalis, further confirmed field results with larval survival on kernels from the cross between non-Bt ears and Bt pollen reaching 60% compared with non-Bt crossed with non-Bt. These results suggest that non-Bt refuge plants, when planted in proximity to Bt plants, and cross-pollinated, can result in sublethal exposure of O. nubilalis and H. zea larvae to Bt and may undermine the high-dose / refuge resistance management strategy for corn hybrids expressing Cry1Ab.
copLanham, MD
pubEntomological Society of America
pmid22066174
doi10.1603/EC11081
tpages4