Bt toxin

Bt toxin

Any of a number of pesticidal toxins—e.g., CryAb1—produced by the soil bacterium Bacillus thurigiensis, which are lethal to corn earworms, Colorado potato bugs and others; genetically engineered crops which produce Bt toxins may eventually become affected by Bt-resistant insects.
Mentioned in ?
References in periodicals archive ?
Various research investigations on commercial Bt cotton varieties have shown that the Bt toxin expressed in the cotton plants are toxic to the target insects, whereas it has no direct impact on non-target insects (O'Callaghan et al.
Further Ghelardiexplained that the Bt toxin may persists in human guts, lungs and other organs.
Bt toxin is released into soil through root exudates and the recycling of crop residues [3-4].
The crystal and spores formed after sporulation were centrifuged at 16,000 rpm for 15 min at 4C temperature to extract required Bt toxin (Crecchio and Stotzky, 2001; Hernandez et al.
All three are immune to the Bt toxin that controls other insects in corn and cotton, so growers often spray "broadspectrum" insecticides, which kill not only stink bugs, but also beneficial insects.
Let's take com that's genetically engineered for insect resistance with this BT toxin in the U.
The first varieties of this Bt maize have now failed spectacularly, as vast areas of farmland have been engulfed by insect pests that have developed resistance to the Bt toxin.
This Bt toxin caused microcytic hypochromic anemia in mice, "even at the lowest tested dose of 27 mg/Kg" in the Mezzomo-led Brazilian study.
Per acre cotton yield has failed to show any progress despite the international companies are regularly conducting trials in Pakistan creating doubts about the efficacy of the GM crop due to having substandard expression of Bt toxin which is a recipe of self disaster," remarked a cotton expert associated with the country's cotton research and development sector.
The study looked at a small sample of Canadian women and determined that of those who were pregnant at the time of the survey, 93 percent of them had traces of Bt toxin in their blood, and 80 percent of their umbilical cords contained the chemical.
A common story, still repeated by Shiva, is that GM corn with Bt toxin kills Monarch butterflies.