Navigation Links
Bigger refuges needed to delay pest resistance to biotech corn
Date:6/8/2012

in the U.S. and only one year after this type of Bt corn was first planted on more than 25 million acres.

According to Tabashnik, Cry3Bb1 is effective enough to be economically useful, but not effective enough to meet the so-called high dose standard, the ability to kill at least 99.99 percent of susceptible pests and also nearly all of the hybrid pests that are produced when resistant pests mate with susceptible pests.

"When Bt crops meet the high dose standard, resistant individuals are extremely rare, and smaller refuges work fine, because you might have one resistant insect in a million. In this case, a 20 percent refuge provides enough susceptible individuals to dilute that rare resistance."

But plants with Cry3Bb1 allow survival of 1 to 6 percent of pests, which is expected to quickly select for resistance.

"A single farm can have millions of these beetles," Tabashnik explained. "If 1 to 6 percent survive on Bt corn, you have tens of thousands of potentially resistant insects and the refuge needs to be much bigger."

Tabashnik's research has shown that in Arizona, Bt cotton meets the high dose standard against pink bollworm and the small refuge strategy has prevented resistance for more than a decade.

On the other hand, Tabashnik pointed to a case in Puerto Rico, where adequate refuges were not planted. Within a few years, the pests evolved resistance and devoured the Bt corn plants. The biotechnology companies voluntary stopped selling Bt corn seed there, but five years later, the insects remain resistant to the toxin.

Although biotech companies recently starting selling some varieties of Bt corn that produce combinations of Bt toxins, Tabashnik said, the resistance to one toxin still raises concerns.

"You can think of the multi-Bt toxin approach as a pyramid: The base has to be stable. If one of your building blocks, which is susceptibility to Cry3Bb1, is crumbling, you have a problem.
'/>"/>

Contact: Daniel Stolte
stolte@email.arizona.edu
520-626-4402
University of Arizona
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Bigger gorillas better at attracting mates and raising young
2. Increasing water scarcity in Californias Bay-Delta will necessitate trade-offs; hard decisions needed to balance various environmental risks
3. Urgent research needed to determine most effective follow-up care for lung cancer patients
4. Report addresses challenges in implementing new diagnostic tests where they are needed most
5. European mountain plant population shows delayed response to climate change
6. Researchers attempt to solve problems of antibiotic resistance and bee deaths in one
7. BRG1 mutations confer resistance to hormones in lung cancer
8. Genetic variation in East Asians found to explain resistance to cancer drugs
9. New paper examines poison resistance in snakes around the world
10. Hot on the trail of metabolic diseases and resistance to antibiotics
11. Notre Dame researchers using novel method to combat malaria drug resistance
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Bigger refuges needed to delay pest resistance to biotech corn
(Date:9/19/2014)... evolve for the sake of fairness per se but ... so say Frans de Waal, PhD, and Sarah Brosnan, ... (IA), which is defined as a negative reaction to ... . , Their conclusion comes after the co-authors ... hypothesis that it is the evolution of forestalling partner ...
(Date:9/19/2014)... Conn. , Sept. 19, 2014 Nxt-ID, Inc. (Nasdaq: ... biometric authentication company focused on the growing m-commerce market, updates the ... world champion in the lightweight and light middleweight weight classes, ... Yesterday it was announced that Game of Thrones actor ... Married with Children star Katey Sagal have ...
(Date:9/18/2014)... University researchers have developed a unique method to use ... in rural areas. , The first microbe-powered, self-sustaining ... quick way to clean up waste from large farming ... , Professor Haluk Beyenal and graduate student Timothy ... discuss the system in the online edition of ...
Breaking Biology News(10 mins):Evolution of responses to (un)fairness 2Evolution of responses to (un)fairness 3NXT-ID's Vinny Paz Celebrity Ad Wocket Update: Katey Sagal and Ciaran Hinds Attached to His Upcoming Movie 2NXT-ID's Vinny Paz Celebrity Ad Wocket Update: Katey Sagal and Ciaran Hinds Attached to His Upcoming Movie 3Researchers develop unique waste cleanup for rural areas 2
... the male of the marine whelk, Solenosteira macrospira . He ... hatching even though few of the baby snails are his ... of California, Davis, puts S. macrospira in ... Throw in extensive promiscuity and sibling cannibalism, and the species has ...
... The rhythm of life is driven by the cycles of day ... (roughly) 24-hour beat. In animals, this rhythm emerges from a tiny ... it out of the brain and keep it alive in a ... up or gearing down production of certain proteins at specific times ...
... agile, intelligent and voracious: the raccoon is far from being a ... one as a pet. It is more like an invader that ... According to a study, its expansion across Spain and Europe is ... of native species and people at risk. Originating in North ...
Cached Biology News:Male snails babysit for other dads 2Male snails babysit for other dads 3Metabolism in the brain fluctuates with circadian rhythm 2The raccoon spreads dangerous diseases as it invades Europe 2The raccoon spreads dangerous diseases as it invades Europe 3
(Date:9/18/2014)... 18, 2014 A novel robotic system ... scanner is currently being tested as part of a ... in Boston with the aim of determining if the ... prostate cancer biopsies faster, more accurate, less costly, and ... has the potential to deliver prostate cancer therapies with ...
(Date:9/18/2014)... On Tuesday, Secretary of Energy Ernest ... for National Lab Day on the Hill. The event ... laboratory system. Durbin and Risch also formally launched the ... of the reach of the national labs as leaders ... some of our nation's most pressing challenges. , "The ...
(Date:9/18/2014)... Research and Markets has announced the addition ... In-situ hybridization, Immunohistochemistry) Market - Trends & Forecasts to ... The global companion diagnostics market is expected to grow ... Factors such as rising need for personalized medicine in ... pharmaceutical industry, support from regulatory authorities, and emerging technologies ...
(Date:9/18/2014)... , Sept. 18, 2014  Neogen Corporation (Nasdaq: ... entered into a strategic agreement with Merck Animal Health ... The Igenity Dairy Heifer Program consists ... information on the genetic potential of replacement dairy heifers. ... calf is born, and is an excellent tool in ...
Breaking Biology Technology:Worcester Polytechnic Institute Participates in Clinical Trial for MRI-Compatible Robot Designed to Improve Accuracy of Prostate Cancer Biopsies 2Worcester Polytechnic Institute Participates in Clinical Trial for MRI-Compatible Robot Designed to Improve Accuracy of Prostate Cancer Biopsies 3Worcester Polytechnic Institute Participates in Clinical Trial for MRI-Compatible Robot Designed to Improve Accuracy of Prostate Cancer Biopsies 4Worcester Polytechnic Institute Participates in Clinical Trial for MRI-Compatible Robot Designed to Improve Accuracy of Prostate Cancer Biopsies 5Worcester Polytechnic Institute Participates in Clinical Trial for MRI-Compatible Robot Designed to Improve Accuracy of Prostate Cancer Biopsies 6Lab Day Highlight Labs' Contribution to U.S. Competitiveness and Innovation 2Lab Day Highlight Labs' Contribution to U.S. Competitiveness and Innovation 3Global Companion Diagnostics (Polymerase Chain Reaction, In-situ hybridization, Immunohistochemistry) Market - Trends & Forecasts to 2019 2Global Companion Diagnostics (Polymerase Chain Reaction, In-situ hybridization, Immunohistochemistry) Market - Trends & Forecasts to 2019 3Merck Animal Health to market Neogen's dairy genomic program 2
... Preclinical Study Shows the Investigational RSV-F Virus-like Particle Vaccine ... Feb. 27 Novavax, Inc. (Nasdaq: NVAX ... Respiratory Syncytial Virus ("RSV") vaccine candidate directed against the ... F protein to fuse with cells in the respiratory ...
... MMR Information Systems, Inc. (OTC Bulletin Board: ... MyMedicalRecords, Inc. (collectively, "MMR") provides consumer-controlled Personal ... electronic safe deposit box storage solutions ( ... banking firm Houlihan Smith & Co. to ...
... and the TechConnect Summit are the Largest Events ... and Clean Tech Solutions From Development to Commercialization ... association with the Nano Science and Technology Institute ... Organization (CTSI), today announced that more than 2,700 ...
Cached Biology Technology:NOVAVAX Announces Preclinical Study Results for a Respiratory Syncytial Virus ('RSV') Vaccine Candidate Directed Against the Fusion (F) Protein 2NOVAVAX Announces Preclinical Study Results for a Respiratory Syncytial Virus ('RSV') Vaccine Candidate Directed Against the Fusion (F) Protein 3NOVAVAX Announces Preclinical Study Results for a Respiratory Syncytial Virus ('RSV') Vaccine Candidate Directed Against the Fusion (F) Protein 4MMR Information Systems, Inc. Engages Houlihan Smith 2MMR Information Systems, Inc. Engages Houlihan Smith 3TechConnect World Publishes Conference Agenda Featuring More than 2,700 Presentations Addressing Nano, Bio and Clean Technologies 2TechConnect World Publishes Conference Agenda Featuring More than 2,700 Presentations Addressing Nano, Bio and Clean Technologies 3TechConnect World Publishes Conference Agenda Featuring More than 2,700 Presentations Addressing Nano, Bio and Clean Technologies 4TechConnect World Publishes Conference Agenda Featuring More than 2,700 Presentations Addressing Nano, Bio and Clean Technologies 5
Gloves are 9.25 long, latex, powder free, smooth and ambidextrous....
Request Info...
Request Info...
The BD OptEIA Rat TNF-alpha ELISA Kit is for the quantitative determination of TNF-alpha in rat serum, plasma and cell culture supernatant....
Biology Products: