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

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 re...

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Bibliographic Details
Published in:Bulletin of entomological research 2005-06, Vol.95 (3), p.243-247
Main Authors: Schuler, T.H., Clark, A.J., Clark, S.J., Poppy, G.M., Stewart, C.N., Denholm, I.
Format: Article
Language:English
Subjects:
alternative prey
Animals
Aphids - drug effects
Aquatic insects
Bacillus thuringiensis
Bacterial Proteins - toxicity
Bacterial Toxins - toxicity
biosafety
Brassica napus
Brassica napus - chemistry
Bt oilseed rape
Chrysoperla
Chrysoperla carnea
Cry1Ac toxin
crystal proteins
Cultivars
delta-endotoxins
Eggs
Endotoxins - toxicity
Environmental conditions
Enzyme-Linked Immunosorbent Assay
Experiments
Food Chain
Generalized linear models
Hemolysin Proteins
Insecta - physiology
Insects
Laboratories
Myzus persicae
nontarget organisms
Oilseeds
Pests
Plants, Genetically Modified - chemistry
Plutella xylostella
population density
predator-prey relationships
Predatory Behavior - physiology
predatory insects
Prey
Rape plants
risk assessment
Species Specificity
Toxins
Transgenic plants
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Summary: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.
ISSN:0007-4853
1475-2670
DOI:10.1079/BER2004356