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Transgenic crops expressing Bacillus thuringiensis toxins and biological control
Because Bt-transgenic varieties can lead to substantial reductions in insecticide use in some crops, they can contribute to integrated pest management systems with a strong biological control component.
Bacterial community structures in honeybee intestines and their response to two insecticidal proteins.
- D. Babendreier, D. Joller, J. Romeis, F. Bigler, F. Widmer
- Biology, MedicineFEMS microbiology ecology
- 1 March 2007
Neither Bt-maize pollen nor high concentrations of Cry1Ab significantly affected bacterial communities in honeybee intestines, and total bacterial community structures may not be a sensitive indicator for providing evidence for the impact of insecticidal proteins on honeybees at sublethal levels.
Assessment of risk of insect-resistant transgenic crops to nontarget arthropods
An international initiative is developing a scientifically rigorous approach to evaluate the potential risks to nontarget arthropods posed by insect-resistant, genetically modified (IRGM) crops to provide guidance to regulatory agencies that are currently developing their own NTA risk assessment guidelines for IRGM crops.
Nectar and pollen feeding by insect herbivores and implications for multitrophic interactions.
This work addresses this largely ignored aspect of multitrophic level interactions and concludes that nectar and pollen feeding by adult herbivores can have a strong impact on plant-herbivore interactions.
Pollen consumption in honey bee larvae: a step forward in the risk assessment of transgenic plants
The data indicate that the contribution of the protein by directly feeding larvae with pollen is less than 5% in relation to the total amount of protein necessary for complete larval development, which is taken into account when establishing dose regimes to assess the risk that transgenic plants pose for honey bee larvae.
Assessing the risks of insect resistant transgenic plants on entomophagous arthropods Bt-maize expressing Cry1Ab as a case study
A framework for risk assessment is proposed to evaluate the effects of insect resistant plants onentomophagous arthropods and a procedure on how to perform tests and give evidence that Bt-maizeposes no risk to this predator is proposed.
Bacillus thuringiensis toxin (Cry1Ab) has no direct effect on larvae of the green lacewing Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae).
Insect pests of pigeonpea and their management.
The biology and ecology of the three most important groups of pests: flower- and pod-feeding Lepidoptera, pod-sucking Hemiptera, and seed-feeding Diptera and Hymenoptera are summarized.
Biological Activity of Cry1Ab Toxin Expressed by Bt Maize Following Ingestion by Herbivorous Arthropods and Exposure of the Predator Chrysoperla carnea
Investigation of the uptake of Cry1Ab toxin by larvae of the green lacewing after consuming two Bt maize-fed herbivores showed that the biological activity of the Cry1 Ab toxin is maintained after ingestion by both herbivore species.
Ecological impacts of genetically modified crops: ten years of field research and commercial cultivation.
- O. Sanvido, J. Romeis, F. Bigler
- Geography, MedicineAdvances in biochemical engineering/biotechnology
The present review highlights the effects of GM crop cultivation on the environment considering the impacts caused by cultivation practices of modern agricultural systems and focuses on the currently commercially available GM crops that could be relevant for agriculture in Western and Central Europe.