Sentences with phrase «bollworm in»

The emergence of resistant pink bollworm in India provided the researchers an opportunity to test the hypothesis that insects in the field would evolve resistance to Bt toxin by the same genetic mechanism found previously in the lab.

Not exact matches

Seven years after China's farmers began planting genetically engineered cotton — tailored specifically to resist bollworm infestation without chemical sprays — they are using just as much pesticide as they did before, researchers reported in July.

«Perhaps the most compelling evidence that refuges work comes from the pink bollworm, which evolved resistance rapidly to Bt cotton in India, but not in the U.S.,» Tabashnik said.

The bollworm, commonly found in Australia, attacks more crops and develops much more resistance to pesticides than the earworm.

«On top of the impact already felt in South America, recent estimates that 65 per cent of the USA's agricultural output is at risk of being affected by the bollworm demonstrates that this work has the potential to instigate changes to research priorities that will have direct ramifications for the people of America, through the food on their tables and the clothes on their backs,» Dr Anderson said.

In 2009, researchers in Arizona tested transgenic pink bollworm moths, which threaten cotton fieldIn 2009, researchers in Arizona tested transgenic pink bollworm moths, which threaten cotton fieldin Arizona tested transgenic pink bollworm moths, which threaten cotton fields.

Their findings, reported in the May 19 issue of the journal PLOS ONE, shed light on how the global caterpillar pest called pink bollworm overcomes biotech cotton, which was designed to make an insect - killing bacterial protein called Bt toxin.

In the U.S., pink bollworm populations have not evolved resistance to Bt toxins in the wilIn the U.S., pink bollworm populations have not evolved resistance to Bt toxins in the wilin the wild.

However, resistant pink bollworm populations have emerged in India, which grows the most Bt cotton of any country in the world.

Scientists from the UA and the U.S. Department of Agriculture worked closely with cotton growers in Arizona to develop and implement resistance management strategies such as providing «refuges» of standard cotton plants that do not produce Bt proteins and releasing sterile pink bollworm moths.

Farmers in the U.S., but not in India, adopted tactics designed to slow evolution of resistance in pink bollworm.

He said that by collaborating with Indian scientists, «we discovered that the same cadherin gene is associated with the resistance in India, but the mutations are different and much more numerous than the ones we found in lab - selected pink bollworm from Arizona.»

As a result, pink bollworm has been all but eradicated in the southwestern U.S. Suppression of this pest with Bt cotton is the cornerstone of an integrated pest management program that has allowed Arizona cotton growers to reduce broad spectrum insecticide use by 80 percent, saving them over $ 10 million annually.

«We wanted to see if field - resistant pink bollworm from India harbored these same changes in the cadherin gene,» Fabrick said.

The researchers learned that the astonishing diversity of cadherin in pink bollworm from India is caused by alternative splicing, a novel mechanism of resistance that allows a single DNA sequence to code for many variants of a protein.

Adding the Bt genes gives the cotton a built - in pesticide against the cotton bollworm, a scourge that can decimate crops.

Based on laboratory experiments aimed at determining the molecular mechanisms involved, scientists knew that pink bollworm could evolve resistance against the Bt toxin, but they had to go all the way to India to observe this happening in the field.

In addition to Fabrick and Tabashnik, the following authors collaborated on the study: Jeyakumar Ponnuraj from the National Institute of Plant Health Management in Hyderabad, India, who studied pink bollworm resistance as a visiting scholar in Tabashnik's lab; Amar Singh and Raj Tanwar of the National Centre for Integrated Pest Management at the Indian Agricultural Research Institute in New Delhi; and Gopalan Unnithan, Alex Yelich, Xianchun Li and Yves Carrière from the UA Department of EntomologIn addition to Fabrick and Tabashnik, the following authors collaborated on the study: Jeyakumar Ponnuraj from the National Institute of Plant Health Management in Hyderabad, India, who studied pink bollworm resistance as a visiting scholar in Tabashnik's lab; Amar Singh and Raj Tanwar of the National Centre for Integrated Pest Management at the Indian Agricultural Research Institute in New Delhi; and Gopalan Unnithan, Alex Yelich, Xianchun Li and Yves Carrière from the UA Department of Entomologin Hyderabad, India, who studied pink bollworm resistance as a visiting scholar in Tabashnik's lab; Amar Singh and Raj Tanwar of the National Centre for Integrated Pest Management at the Indian Agricultural Research Institute in New Delhi; and Gopalan Unnithan, Alex Yelich, Xianchun Li and Yves Carrière from the UA Department of Entomologin Tabashnik's lab; Amar Singh and Raj Tanwar of the National Centre for Integrated Pest Management at the Indian Agricultural Research Institute in New Delhi; and Gopalan Unnithan, Alex Yelich, Xianchun Li and Yves Carrière from the UA Department of Entomologin New Delhi; and Gopalan Unnithan, Alex Yelich, Xianchun Li and Yves Carrière from the UA Department of Entomology.

By sequencing the DNA of resistant pink bollworm collected from the field in India — which grows the most Bt cotton of any country in the world — the team found that the insects produce remarkably diverse disrupted variants of cadherin.

ICIPE is now testing the push - pull method in rice cultivation, and against the cotton bollworm, both features that bode good news for millions of Asia's small farmers.

Part of the problem in bollworms developing resistance to the Bt toxin is over-cultivation of the GM crop, in the sense of planting too much of it close together and not providing so - called «refuge» space between fields and farms.

This particular study did not examine whether the bollworms survived because they developed a resistance the toxin or because the toxin present in the cotton was insufficient to kill them.

Looking at two varieties of Bt cotton in commercial use, containing both single and double genes intended to be toxin to the bollworms, the scientists found that the pests were able to survive.

Back in March of this year, however, Monsanto admitted that pink bollworms had developed resistance to Bt cotton in the Indian state of Gujarat, in plots where the single gene variety (Bollgard I) of the GM crop was planted.

One of the pests, the cotton bollworm, is widespread in Africa, Asia and Europe and causes damage to over 100 crops, including corn, cotton, tomato and soybean.