Survival and development of a stored-product pest, Sitophilus zeamais (Coleoptera

Curculionidae), and its natural enemy, the parasitoid Lariophagus distinguendus (Hymenoptera: Pteromalidae), on transgenic Bt maize

Lise S. Hansen, Gábor L. Lövei, A. Székács

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Background: The effect of transgenic maize (Zea mays L.) containing a lepidopteran-specific Bt toxin on a stored-product pest, Sitophilus zeamais Motschulsky, and its parasitoid, Lariophagus distinguendus Förster, was examined in the laboratory to test the impact of transgenic maize on stored-product pests and their biological control. Results: Weevils were not harmfully affected by transgenic Bt maize in their development characteristics (development time, body mass), and females emerging from transgenic maize kernels were larger. However, significantly fewer parasitoid females emerged from weevils that developed in transgenic kernels, although parasitoids did not develop more slowly and were not different in size or mass from their conspecifics emerging from hosts in non-transgenic maize kernels. Conclusion: The emergence of female parasitoids was reduced in transgenic Bt maize, and this effect cannot be explained by the known lepidopteran-specific toxicity of Bt Cry1Ab toxin.

Original languageEnglish
Pages (from-to)602-606
Number of pages5
JournalPest Management Science
Volume69
Issue number5
DOIs
Publication statusPublished - May 2013

Fingerprint

Lariophagus distinguendus
Sitophilus zeamais
storage pests
Pteromalidae
natural enemies
Curculionidae
Hymenoptera
genetically modified organisms
Coleoptera
corn
parasitoids
toxins
seeds
Lepidoptera
eclosion
biological control
Zea mays
toxicity

Keywords

  • Biological control
  • Biosafety
  • Bt maize
  • Stored-product pests
  • Transgenic maize
  • Tritrophic interactions

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Insect Science

Cite this

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title = "Survival and development of a stored-product pest, Sitophilus zeamais (Coleoptera: Curculionidae), and its natural enemy, the parasitoid Lariophagus distinguendus (Hymenoptera: Pteromalidae), on transgenic Bt maize",
abstract = "Background: The effect of transgenic maize (Zea mays L.) containing a lepidopteran-specific Bt toxin on a stored-product pest, Sitophilus zeamais Motschulsky, and its parasitoid, Lariophagus distinguendus F{\"o}rster, was examined in the laboratory to test the impact of transgenic maize on stored-product pests and their biological control. Results: Weevils were not harmfully affected by transgenic Bt maize in their development characteristics (development time, body mass), and females emerging from transgenic maize kernels were larger. However, significantly fewer parasitoid females emerged from weevils that developed in transgenic kernels, although parasitoids did not develop more slowly and were not different in size or mass from their conspecifics emerging from hosts in non-transgenic maize kernels. Conclusion: The emergence of female parasitoids was reduced in transgenic Bt maize, and this effect cannot be explained by the known lepidopteran-specific toxicity of Bt Cry1Ab toxin.",
keywords = "Biological control, Biosafety, Bt maize, Stored-product pests, Transgenic maize, Tritrophic interactions",
author = "Hansen, {Lise S.} and L{\"o}vei, {G{\'a}bor L.} and A. Sz{\'e}k{\'a}cs",
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T1 - Survival and development of a stored-product pest, Sitophilus zeamais (Coleoptera

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AU - Hansen, Lise S.

AU - Lövei, Gábor L.

AU - Székács, A.

PY - 2013/5

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N2 - Background: The effect of transgenic maize (Zea mays L.) containing a lepidopteran-specific Bt toxin on a stored-product pest, Sitophilus zeamais Motschulsky, and its parasitoid, Lariophagus distinguendus Förster, was examined in the laboratory to test the impact of transgenic maize on stored-product pests and their biological control. Results: Weevils were not harmfully affected by transgenic Bt maize in their development characteristics (development time, body mass), and females emerging from transgenic maize kernels were larger. However, significantly fewer parasitoid females emerged from weevils that developed in transgenic kernels, although parasitoids did not develop more slowly and were not different in size or mass from their conspecifics emerging from hosts in non-transgenic maize kernels. Conclusion: The emergence of female parasitoids was reduced in transgenic Bt maize, and this effect cannot be explained by the known lepidopteran-specific toxicity of Bt Cry1Ab toxin.

AB - Background: The effect of transgenic maize (Zea mays L.) containing a lepidopteran-specific Bt toxin on a stored-product pest, Sitophilus zeamais Motschulsky, and its parasitoid, Lariophagus distinguendus Förster, was examined in the laboratory to test the impact of transgenic maize on stored-product pests and their biological control. Results: Weevils were not harmfully affected by transgenic Bt maize in their development characteristics (development time, body mass), and females emerging from transgenic maize kernels were larger. However, significantly fewer parasitoid females emerged from weevils that developed in transgenic kernels, although parasitoids did not develop more slowly and were not different in size or mass from their conspecifics emerging from hosts in non-transgenic maize kernels. Conclusion: The emergence of female parasitoids was reduced in transgenic Bt maize, and this effect cannot be explained by the known lepidopteran-specific toxicity of Bt Cry1Ab toxin.

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KW - Biosafety

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