Bt crops benefit natural enemies to control non-target pests
Open accessAbstract
Crops producing insecticidal crystal (Cry) proteins from Bacillus thuringiensis (Bt) control important lepidopteran pests. However, pests such as aphids not susceptible to Cry proteins may require other integrated pest management (IPM) tactics, including biological control. We fed aphids on Bt and non-Bt plants and analyzed the Bt protein residue in aphids and compared the effects of Bt plants and a pyrethroid, lambda-cyhalothrin, on the performance of three natural enemies (predators: Coleomegilla maculata and Eupeodes americanus; parasitoid Aphidius colemani) of the green peach aphid, Myzus persicae. No Bt protein residues in aphids were detected and no significant differences were recorded in the performance of pyrethroid-resistant aphids that fed on Bt broccoli expressing Cry1Ab or Cry1C, or on non-Bt broccoli plants treated or not treated with the pyrethroid. This indicated the aphids were not affected by the Cry proteins or the pyrethroid, thus removing any effect of prey quality. Tri-trophic experiments demonstrated that no C. maculata and E. americanus survived consumption of pyrethroid-treated aphids and that ovipositional behavior of A. colemani was impaired when provided with pyrethroid-treated aphids. In contrast, natural enemies were not affected when fed aphids reared on Bt broccoli, thus demonstrating the safety of these Bt plants for IPM.
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In the second comparison study, adverse effects on natural enemies were observed in the pyrethroid treatment but not in the Bt broccoli treatment.
“Again, adverse effects on the natural enemies were observed in the pyrethroid treatment but not in the case of Bt broccoli.”
From Genetically engineered crops help support conservation biological control (2019) · cites this paper as Tian et al., 2015
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Genetically engineered crops help support conservation biological control
Romeis, J., Naranjo, S. E., Meissle, M., & Shelton, A. M. (2019) · Biological Control · doi:10.1016/j.biocontrol.2018.10.001 · Cited by 231 · see citing works
“Many studies in this crop have been dominated by Macrocentris grandii (Hymenoptera: Braconidae), an exotic parasitoid introduced to the USA for control of O. nubilalis, which is in turn the main target of Bt maize.”
BackgroundInfluentialSelf-citation
- Authors
- Tian, J.-C., Yao, J., Long, L.-P., Romeis, J., & Shelton, A. M.
- Affiliations
- Cornell University (US)
- Agroscope (CH)
- Corresponding author
- Shelton, Anthony M.
- Venue
- Scientific Reports
- Published
- 2015-11-12
- Volume
- 5
- Issue
- 1
- Pages
- 16636-16636
- ISSN
- 2045-2322 (ISSN-L)
- PMC
- PMC4642322
- OpenAlex
- W2402764482
- Cited by
- 41
- References
- 62
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 3 · 2023: 4 · 2022: 6 · 2021: 3 · 2020: 4 · 2019: 4 · 2018: 10 · 2017: 1 · 2016: 2
- FWCI
- 1.88
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Reports (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Funders
- U.S. Department of Agriculture
- National Institute of Food and Agriculture
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Insect Resistance and Genetics
- Life Sciences › Agricultural and Biological Sciences › Insect Science › Insect-Plant Interactions and Control
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Genetically Modified Organisms Research
- Keywords
- Bt crops, Bacillus thuringiensis, Cry proteins, non-target effects, natural enemies, biological control, Myzus persicae, lambda-cyhalothrin, pyrethroid resistance, Coleomegilla maculata, Aphidius colemani, prey quality, oviposition behavior, integrated pest management, broccoli, Cry1Ab, Cry1C
- MeSH terms
- Animals, Aphids, Bacillus thuringiensis, Bacterial Proteins, Host-Parasite Interactions, Pest Control, Biological, Receptors, Cell Surface, Crops, Agricultural, Insect Proteins, Plants, Genetically Modified
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