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Laboratory studies of the effects of reduced prey choice caused by Bt plants on a predatory insect

  • T.H. Schuler (a1), A.J. Clark (a1), S.J. Clark (a2), G.M. Poppy (a3), C.N. Stewart (a4) and I. Denholm (a1)
  • DOI:
  • Published online: 01 March 2007

Crops transformed to express Bacillus thuringiensis (Bt) toxins can cause close to 100% mortality of certain target pest species. This study assessed the effect of target pest reduction on the predatory insect Chrysoperla carnea (Stephens) in the presence of alternative prey. Numbers of lacewings recovered from Bt oilseed rape (cultivar Oscar, event O52) did not differ significantly from numbers of lacewings recovered from conventional oilseed rape in cage experiments with the target pest Plutella xylostella (Linnaeus) and the non-target pest Myzus persicae (Sulzer) when aphid densities were high. However, significantly fewer lacewings were recovered from Bt plants as aphid densities were lowered. Lacewing weights were not affected by plant type.

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A. Dutton , H. Klein , J. Romeis & F. Bigler (2002) Uptake of Bt-toxin by herbivores feeding on transgenic maize and consequences for the predator Chrysoperla carnea. Ecological Entomology 27, 441447.

S.D. Eigenbrode , N.N. Kabalo & K.A. Stoner (1999) Predation, behavior, and attachment by Chrysoperla plorabunda larvae on Brassica oleracea with different surface waxblooms. Entomologia Experimentalis et Applicata 90, 225235.

G. Head , C.R. Brown , M.E. Groth & J.J. Duan (2001) Cry1Ab protein levels in phytophagous insects feeding on transgenic corn: implications for secondary exposure risk assessment. Entomologia Experimentalis et Applicata 99, 3745.

A. Hilbeck , M. Baumgartner , P.M. Fried & F. Bigler (1998) Effects of transgenic Bacillus thuringiensis corn-fed prey on mortality and development time of immature Chrysoperla carnea (Neuroptera: Chrysopidae). Environmental Entomology 27, 480487.

M.S. Meier & A. Hilbeck (2001) Influence of transgenic Bacillus thuringiensis corn-fed prey on prey preference of immature Chrysoperla carnea (Neuroptera: Chrysopidae). Basic and Applied Ecology 2, 3544.

J.J. Obrycki , E.J. Losey , O.R. Taylor & L.C.H. Jesse (2001) Transgenic insecticidal corn: beyond insecticidal toxicity to ecological complexity. Bioscience 51, 353361.

R.P.J. Potting & G.M. Poppy & T.H. Schuler (1999) The role of volatiles from cruciferous plants and pre-flight experience in the foraging behaviour of the specialist parasitoid Cotesia plutellae. Entomologia Experimentalis et Applicata 93, 8795.

A. Raps , J. Kehr , P. Gugerli , W.J. Moar , F. Bigler & A. Hilbeck (2001) Detection of Cry1Ab in phloem sap of Bacillus thuringiensis corn and in the non-target herbivores Rhopalosiphum padi (Homoptera: Aphidae) and Spodoptera littoralis (Lepidoptera: Noctuidae). Molecular Ecology 10, 525533.

T.H. Schuler , I. Denholm , L. Jouanin , S.J. Clark , A.J. Clark & G.M. Poppy (2001) Population-scale laboratory studies of the effect of transgenic plants on non-target insects. Molecular Ecology 10, 18451853.

T.H. Schuler , R.P.J. Potting , I. Denholm , S.J. Clark , A.J. Clark , C.N. Stewart & G.M. Poppy Jr (2003) Tritrophic choice experiments with Bt plants, the diamondback moth (Plutella xylostella) and the parasitoid Cotesia plutellae. Transgenic Research 12, 351361.

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Bulletin of Entomological Research
  • ISSN: 0007-4853
  • EISSN: 1475-2670
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