نتایج جستجو برای: bt cotton

تعداد نتایج: 28655  

Journal: :Science 2003
Matin Qaim David Zilberman

Onfarm field trials carried out with Bacillus thuringiensis (Bt) cotton in different states of India show that the technology substantially reduces pest damage and increases yields. The yield gains are much higher than what has been reported for other countries where genetically modified crops were used mostly to replace and enhance chemical pest control. In many developing countries, small-sca...

Journal: :GM crops & food 2012
Anthony M Shelton

Genetically engineered (GE) insect-resistant crops that express proteins from Bacillus thuringiensis (Bt) have been widely adopted in the two field crops currently commercially available, Bt cotton and Bt corn. However, the development and commercialization of Bt vegetables has lagged in comparison, which is unfortunate since vegetables tend to be insecticide-intensive crops due to high pest pr...

Journal: :Science 2007
Michelle Marvier Chanel McCreedy James Regetz Peter Kareiva

Although scores of experiments have examined the ecological consequences of transgenic Bacillus thuringiensis (Bt) crops, debates continue regarding the nontarget impacts of this technology. Quantitative reviews of existing studies are crucial for better gauging risks and improving future risk assessments. To encourage evidence-based risk analyses, we constructed a searchable database for nonta...

2011
Vijesh Krishna Matin Qaim

The primary focus of the study is the changes that occurred in the pesticide-use structure of cotton production sector of India, owing to the diffusion of Bacillus thuringiensis (Bt) technology. Studies from different countries show that transgenic Bt crops can reduce chemical pesticide use with positive economic, environmental, and health effects. However, most of these studies build on cross-...

Journal: :Journal of applied biotechnology & bioengineering 2023

The strains of BT bacterium produce approximately 200 different toxins known as BT-Toxins which are harmful for insects most commonly against cotton bollworms(lepidopteran), butterflies, flies, and moths. So, scientist inserted the gene Bacillus thuringiensis was lepidopteran into crop so that toxin kill pest make resistant. we can get good yield by using simple concept rational plant populatio...

Journal: :Pest management science 2010
Fengyi Liu Zhiping Xu Yu Cheng Zhu Fangneng Huang Yanhua Wang Huiling Li Hua Li Congfen Gao Weijun Zhou Jinliang Shen

BACKGROUND Evolution of resistance threatens the continued success of transgenic crops expressing insecticidal proteins. One of the key factors for successful resistance management is the timely implementation of monitoring programmes to detect early changes of resistance allele frequency in field populations. F(1)/F(2) screen, dose-response bioassays and field survey were used to monitor resis...

Journal: :Journal of economic entomology 2008
Carlos A Blanco Nicholas P Storer Craig A Abel Ryan Jackson Rogers Leonard Juan D Lopez Gregory Payne Blair D Siegfried Terence Spencer Antonio P Terán-Vargas

Transgenic cotton, Gossypium hirsutum L., lines expressing both Cry1F and Cry1Ac insecticidal proteins from Bacillus thuringiensis (Bt) have been commercially available in the United States since 2005. Both Bt proteins are highly effective against tobacco budworm, Heliothis virescens (F.), and other lepidopteran pests of cotton. Although CrylAc has been available in Bt cotton since 1996, the Cr...

Journal: :Journal of invertebrate pathology 2007
Sakuntala Sivasupramaniam Graham P Head Leigh English Yue Jin Li Ty T Vaughn

Transgenic crops producing insecticidal toxins from the bacterium Bacillus thuringiensis (Bt) have been grown in many parts of the world since 1996. In the United States, the Environmental Protection Agency (EPA) has required that industry submit insect resistance management (IRM) plans for each Bt corn and cotton product commercialized. A coalition of stakeholders including the EPA, USDA, acad...

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