Navigation Links
Insecticides from genetically modified corn present in adjacent streams
Date:9/27/2010

In a paper published this week in the Proceedings of the National Academy of Sciences, Cary Institute aquatic ecologist Dr. Emma Rosi-Marshall and colleagues report that streams throughout the Midwestern Corn Belt are receiving insecticidal proteins that originate from adjacent genetically modified crops. The protein enters streams through runoff and when corn leaves, stalks, and plant parts are washed into stream channels.

Genetically-modified plants are a mainstay of large-scale agriculture in the American Midwest, where corn is a dominant crop. In 2009, more than 85% of U.S. corn crops were genetically modified to repel pests and/or resist herbicide exposure. Corn engineered to release an insecticide that wards off the European corn borer, commonly referred to as Bt corn, comprised 63% of crops. The tissue of these plants has been modified to express insecticidal proteins, one of which is commonly known as Cry1Ab.

Following an assessment of 217 stream sites in Indiana, the paper's authors found dissolved Cry1Ab proteins from Bt corn present in stream water at nearly a quarter of the sites, including headwater streams. Eighty-six percent of the sampled sites contained corn leaves, husks, stalks, or cobs in their channels; at 13% of these sites corn byproducts contained detectable Cry1Ab proteins. The study was conducted six months after crop harvest, indicating that the insecticidal proteins in crop byproducts can persist in the landscape.

Using these data, U.S. Department of Agriculture land cover data, and GIS modeling, the authors found that all of the stream sites with detectable Cry1Ab insecticidal proteins were located within 500 meters of a corn field. Furthermore, given current agricultural land use patterns, 91% percent of the streams and rivers throughout Iowa, Illinois, and Indiana some 159,000 miles of waterwaysare also located within 500 meters of corn fields.

Rosi-Marshall comments, "Our research adds to the growing body of evidence that corn crop byproducts can be dispersed throughout a stream network, and that the compounds associated with genetically-modified crops, such as insecticidal proteins, can enter nearby water bodies."

After corn crops are harvested, a common agricultural practice is to leave discarded plant material on the fields. This "no-till" form of agriculture minimizes soil erosion, but it also sets the stage for corn byproducts to enter nearby stream channels.

Rosi-Marshall concludes, "The tight linkage between corn fields and streams warrants further research into how corn byproducts, including Cr1Ab insecticidal proteins, potentially impact non-target ecosystems, such as streams and wetlands." These corn byproducts may alter the health of freshwaters. Ultimately, streams that originate in the Corn Belt drain into the Mississippi River and the Great Lakes.


'/>"/>

Contact: Lori M. Quillen
QuillenL@caryinstitute.org
845-677-7600 x233
Cary Institute of Ecosystem Studies
Source:Eurekalert  

Related biology news :

1. NIH funds development of resistance-breaking insecticides to reduce malaria transmission
2. Manatee subspecies genetically confirmed, but diversity challenge looms
3. Scientists find new evidence of genetically modified plants in the wild
4. Scientists find the first evidence of genetically modified plants in the wild
5. Woods noble rot fungus genetically decoded
6. Genetically reprogrammed HSV given systemically shrinks distant sarcomas
7. Genetically modified cell procedure may prove useful in treating kidney failure
8. UT Southwestern researchers use novel sperm stem-cell technique to produce genetically modified rats
9. Genetically engineered crops benefit many farmers, but the technology needs proper management to remain effective
10. Genetically engineered tobacco plant cleans up environmental toxin
11. Genetically-modified mice reveal another mechanism contributing to heart failure
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Insecticides from genetically modified corn present in adjacent streams
(Date:11/29/2016)... -- BioDirection, a privately held medical device company developing ... of concussion and other traumatic brain injury (TBI), announced ... with the U.S. Food and Drug Administration (FDA) to ... the meeting company representatives reviewed plans for clinical development ... of a planned pilot trial. "We ...
(Date:11/22/2016)... -- According to the new market research report "Biometric System ... Voice), Multi-Factor), Component (Hardware and Software), Function (Contact and Non-contact), Application, and ... expected to grow from USD 10.74 Billion in 2015 to reach USD ... 2022. Continue Reading ... ...
(Date:11/17/2016)... Nov. 17, 2016  AIC announces that it has just released a new white ... require high-performance scale-out plus high speed data transfer storage solutions. Photo - ... ... ... Setting up a high performance computing or ...
Breaking Biology News(10 mins):
(Date:12/7/2016)... Dec. 7, 2016  Vyriad Inc. announced today the ... company,s Board of Directors. "We are delighted ... our business and develop our oncolytic viruses as the ... Stephen Russell , MD, PhD, CEO of Vyriad. ... our vision and passion for making a difference for ...
(Date:12/7/2016)... DIEGO , December 7, 2016 ... in the International Journal of Molecular Sciences a team of ... 1 ] have demonstrated that expression of NR2F6 ...  These scientists tested for NR2F6 in patient,s cervical cancer tissue ... their tumors. "This is an interesting study and ...
(Date:12/7/2016)... , ... December 07, 2016 ... ... opening applications to an early access program for SmartBiome -- a novel ... with the simultaneous specific enrichment and detection of hundreds of different genes. ...
(Date:12/6/2016)... ... December 06, 2016 , ... ... largest privately-held contract pharmaceutical development and manufacturing organisation, today announced the ... company combining a leading CRO and the industry’s only Contract Commercial Organization ...
Breaking Biology Technology: