Appl Environ Microbiol. 2005 May;71(5):2558-63. New resistance mechanism in Helicoverpa armigera threatens transgenic crops expressing Bacillus thuringiensis Cry1Ac toxin. Environ. Entomol. 34(5): 1211Ð1223 (2005) Long-Term Assessment of the Effects of Transgenic Bt Cotton on the Function of the Natural Enemy Community. Skip to Main Content Sign In Register Advanced Search Online ISSN 1938-2936 Print ISSN 0046-225X Copyright © 2017 Entomological Society of America Connect Resources Explore Oxford University Press is a department of the University of Oxford. Close. Crop Protection 25 (2006) 940–948 Effects of Bt cotton expressing Cry1Ac and Cry2Ab and non-Bt cotton on behavior, survival and development of Trichoplusia ni (Lepidoptera: Noctuidae) ISAAA - 2002 - Evaluation détaillée du coton Bt. OGM_GOUV_QC_CA - Coton Bt. EMBRAPA - Présentation : Évaluation comparative de matériels génétiques dans les pays dits du C 4 , pour une amélioration variét.
University of Hohenheim - AOUT 2009 - Effects of Bt Cotton in India During the First Five Years of Adoption. AgBioForum, 10(1): 44-50. ©2007 Inequality and GM Crops: A Case-Study of Bt Cotton in India. AGBIOFORUM - Bt cotton benefits, costs and impacts in China. Bt Cotton Benefits, Costs, and Impacts in China Jikun Huang, Ruifa Hu, Cuihui Fan, Carl E. Pray, and Scott Rozelle Chinese Academy of Sciences; Rutgers University; University of California, Davis The overall goal of this research is to reexamine findings of earlier efforts that analyzed the effect of Bt cotton adoption in 1999 with two follow-up surveys conducted in 2000 and 2001. Our survey data on yields and econometric analyses indicate that the adoption of Bt cotton continued to increase output per hectare in 2000 and 2001 and that the yield gains extended to all provinces in our sample.
More importantly, Bt cotton farmers also increased their incomes by reducing their use of pesticides and labor inputs. Finally, survey data show that Bt cotton continues to have positive environmental impacts by reducing pesticide use. Key words: biotechnology, cotton, economic impacts, China. Introduction However, China's rural economy is evolving rapidly. Bt Cotton Development and Adoption in China. PLOS - 2009 - Indian Bt cotton varieties do not affect the performance of cotton aphids. Cotton varieties expressing Cry proteins derived from the soil bacterium Bacillus thuringiensis (Bt) are grown worldwide for the management of pest Lepidoptera.
To prevent non-target pest outbreaks and to retain the biological control function provided by predators and parasitoids, the potential risk that Bt crops may pose to non-target arthropods is addressed prior to their commercialization. Aphids play an important role in agricultural systems since they serve as prey or host to a number of predators and parasitoids and their honeydew is an important energy source for several arthropods. To explore possible indirect effects of Bt crops we here examined the impact of Bt cotton on aphids and their honeydew. In climate chambers we assessed the performance of cotton aphids, Aphis gossypii Glover (Hemiptera: Aphididae) when grown on three Indian Bt (Cry1Ac) cotton varieties (MECH 12, MECH 162, MECH 184) and their non-transformed near isolines. Figures Editor: Hany A. Introduction Results. SYNGENTA FOUNDATION - Présentation : L’expérience du Burkina Faso en matière de production du coton génétiquement modifié (coton. 1-Loganathan.
Fok_CGM_PED_preprint. 758.pdf (Objet application/pdf) Crop Protection 25 (2006) 940–948 Effects of Bt cotton expressing Cry1Ac and Cry2Ab and non-Bt cotton on behavior, surviv. CAHIERS AGRICULTURES - 2009 - Le marché des variétés de coton-Bt : analyse de la situation en Chine dans une perspective interna. ARS USDA - 2001 - Bt Cotton - Management of the Tobacco Budworm-Bollworm Complex. GRAIN - JANVIER 2007 - Coton Bt: les faits derrière le battage publicitaire. Cela fait maintenant plus de dix ans que le coton génétiquement modifié Bt est commercialisé. Il a été depuis introduit et testé dans plus de vingt pays. Sa culture est un succès évident pour Monsanto, la principale entreprise de coton Bt. Mais qu'est que cela a signifié pour les agriculteurs? On peut avoir aujourd'hui une vision plus claire de ce qui se passe dans les fermes dans de nombreux pays à travers le monde. Début novembre 2006, l'Institut national de recherche agricole du Burkina Faso a invité un groupe de journalistes, de scientifiques et d'agriculteurs sur un site d'essais de coton Bt dans la ville de Boni.
La démonstration était suffisante pour convaincre un grand nombre d'agriculteurs présents. Un mois plus tôt, dans une autre partie du pays, les champs de coton d'un projet très différent – visant à réduire l'usage des pesticides – étaient aussi présentés, bien que suscitant moins d'attention de la part du gouvernement et des médias. Des capsules à moitié vides. TAMILNADU AGRICULTURAL UNIVERSITY (Inde) - Bt cotton vis-à-vis environmental protection: An Indian PerspectiveBt Cotton in India.
A small number of larval survival and reproduction of Helicoverpa armigera on Bt-cotton is not unexpected Insects on Bt-cotton: desperate reactions Bt Cotton in India -Prospects and problems Bt cotton vis-à-vis environmental protection: An Indian Perspective Top Central Institute for Cotton Research, Regional Station, Coimbatore, India Abstract Cotton the most important commercial crop of India, often referred as the White Gold, consumes more than 45% of the total pesticides used in our country. Ever since three Bt cotton hybrids have been approved for commercial cultivation in India during 2002, there was a sharp increase in area under cultivation of such hybrids from a mere 72,000 ac in 2002-03 to 30,00,000 ha in 2006-07.
Bt cotton hybrids exhibited excellent control of American Boll worm and reduced the use of insecticides leading to create eco-friendly environment without compromising on profitable yield. Introduction The Need for Bt cotton Chronology of Bt Cotton in India Table 1. Table5. UNIVERSITY OF CALIFORNIA - Bt Cotton Data. Bt Cotton Data For cotton growers, there was a lot of pressure from pests before the introduction of Bt cotton in 1996. Due to synthetic pesticide resistance, farmers were losing much of their cotton to tobacco budworms, cotton bollworms, and pink bollworms. In 1995, attacks from these pests reduced U.S. cotton yields by over 4%, or by over a quarter billion dollars worth of cotton. In some states such as Alabama, budworm damage reduced Alabama yields by 29% despite growers applying the highest applications of insecticide in the US. Reduction in Pesticide Control Costs: It is estimated that the average cost reduction in pesticides applied on Bt cotton fields from 1996 to 1998 is between $25 and $65 per acre.
Increased Yield: Bt cotton planted from 1996 to 1998 is estimated to have yielded 5% more on average than if traditional cotton would have been planted. Price Effect: It is estimated that prices are .8¢/lb. lower from increased production due to Bt technology. Decrease in Pest control cost. UNIVERSITE GEMBLOUX - 2006 - Les cotonniers (Gossypium hirsutum L.) génétiquement modifiés, Bt : quel avenir pour la petite agri. 1Depuis 10 ans, la culture de plantes génétiquement modifiées (PGM) ne cesse de s’accroître dans le monde. En 2005, la surface totale plantée en PGM était de 90 millions d’hectares dont un peu plus d’un dixième occupés par les cotonniers transgéniques (ISAAA, 2006).
Arrivée au seuil de 30 % des surfaces cotonnières du globe, la culture des cotonniers (Gossypium hirsutum L.) génétiquement modifiés (CGM) infléchi sa croissance depuis 2004 (James, 2005 a, b). Dans le futur à moyen terme, à l’exception du Brésil, les pays adoptants des CGM ont peu de chance de voir leur surface cotonnière s’accroître significativement (Estur, 2006 ; Fok et al., 2006). Pour augmenter leur part du marché, les sociétés commercialisant les CGM doivent dès lors s’attaquer à des marchés actuellement exempts de semences transgéniques. 2L’introduction de cette semence « high-tech », originellement destinée à l’agriculture intensifiée, est un véritable enjeu pour l’agriculture paysanne africaine. 3.1. 3.2. 3.3.
MUSEUM AGROPOLIS 28/02/06 Coton Bio ou coton Bt : Une solution pour les paysans pauvres ? AIEA2 International Conference “Knowledge, Sustainability and Bio-Resources in the further Development of Agri-food System. CORNELL UNIVERSITY 25/06/06 Seven-year glitch: Cornell warns that Chinese GM cotton farmers are losing money due to 'secondary' Although Chinese cotton growers were among the first farmers worldwide to plant genetically modified (GM) cotton to resist bollworms, the substantial profits they have reaped for several years by saving on pesticides have now been eroded. The reason, as reported by Cornell University researchers at the American Agricultural Economics Association (AAEA) Annual Meeting in Long Beach, Calif., July 25, is that other pests are now attacking the GM cotton.
The GM crop is known as Bt cotton, shorthand for the Bacillus thuringiensis gene inserted into the seeds to produce toxins. But these toxins are lethal only to leaf-eating bollworms. After seven years, populations of other insects -- such as mirids -- have increased so much that farmers are now having to spray their crops up to 20 times a growing season to control them, according to the study of 481 Chinese farmers in five major cotton-producing provinces. Présentation : GM Cotton in Colombia: success and challenges. AgBioForum, 10(1): 44-50. ©2007 Inequality and GM Crops: A Case-Study of Bt Cotton in India.