Search Results for: Bt11
Assessing the impact of Cry1Ab-expressing corn pollen on monarch butterfly larvae in field studies
Abstract: Survival and growth of monarch larvae, Danaus plexippus (L.), after exposure to either Cry1Ab-expressing pollen from three Bacillus thuringiensis (Bt) corn (Zea mays L.) events differing in toxin expression or to the insecticide, λ-cyhalothrin, were examined in field studies. First instars exposed to low doses (≈22 grains per cm2) of event-176 pollen gained 18% …
Bt toxin is released in root exudates from 12 transgenic corn hybrids representing three transformation events
Abstract: The anti-lepidopteran toxin (Cry1Ab protein) encoded by truncated genes from Bacillus thuringiensis was released in the root exudates from all hybrids of Bt corn studied and which represented three transformation events (Bt11, MON810, and 176). In vitro and in situ studies indicated that the toxin released in root exudates accumulates in soil, as it …
Cross-fertilization between genetically modified and non-genetically modified maize crops in Uruguay
Abstract: The cultivation of genetically modified (GM) Bt maize (Zea mays L.) events MON810 and Bt11 is permitted in Uruguay. Local regulations specify that 10% of the crop should be a non-GM cultivar as refuge area for biodiversity, and the distance from other non-GM maize crops should be more than 250 m in order to …
Survival of experimental cohorts of monarch larvae following exposure to transgenic Bt corn pollen and anthers
Text: Recent data on the effects of transgenic Bacillus thuringiensis (Bt) corn pollen on larvae of the monarch butterfly and the black swallowtail, Papilio polyxenes, two butterfly species that occur on plants within and adjacent to cornfields in the midwestern United States, have been used by the U.S. Environmental Protection Agency (EPA) in a reassessment …
Environmental and ecological aspects of first generation genetically modified crops regarding their impacts in a European maize producer country
Abstract: The success of the first generation of genetically modified (GM) crops for plant protection purposes in the US has not been followed by similar progress in Europe, where cultivation represents only 3‰ of the overall worldwide GM cultivation area. As for insect resistant GM plants, protection against numerous important maize pests is yet unresolved …
Prevalence of genetically modified rice, maize, and soy in Saudi food products
Abstract: Qualitative and quantitative DNA-based methods were applied to detect genetically modified foods in samples from markets in the Kingdom of Saudi Arabia. Two hundred samples were collected from Al-Qassim, Riyadh, and Mahdina in 2009 and 2010. GMOScreen 35S and NOS test kits for the detection of genetically modified organism varieties in samples were used. …
Ecological effects of genetically modified maize with insect resistance and/or herbicide tolerance
Abstract: This review evaluates scientific studies published in peer-review journals during the last 3-4 years that considered ecological effects of insect resistant (Bt) and herbicide tolerant maize. The majority of the scientific studies deal with ecological effects of maize containing the Cry1Ab toxin. In contrast, very few studies are available that considered other Cry toxins …
