Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

In Wisconsin, 75 Percent of Economic Benefit of Bt Corn Goes to Farmers Who Don’t Plant It

08.10.2010
Widespread planting of genetically modified Bt corn throughout the Upper Midwest has suppressed populations of the European corn borer, a major insect pest of corn, with the majority of the economic benefits going to growers who do not plant Bt corn, reports a multistate team of scientists in the Oct. 8 edition of the journal Science.

In Wisconsin, 75 percent of the $325 million cumulative economic benefit linked to Bt corn’s pest suppression between 1996-2009 went to non-Bt corn growers. Wisconsin currently has about 3.9 million corn acres, with approximately half in Bt corn.

“This study is the first to estimate the value of area-wide pest suppression from transgenic crops and the subsequent benefit to growers of non-transgenic crops. In this case, the value of the indirect yield benefits for non-Bt corn acres exceeded the net value of direct benefits to Bt corn acres,” says co-author Paul Mitchell, a University of Wisconsin-Madison agricultural economist who conducted the economic analysis for the study.

Bt corn is genetically modified (GM) to contain a protein from the soil bacterium Bacillus thuringiensis (Bt) that kills insect pests. According to the team’s calculations, the total economic benefit of Bt corn’s pest suppression across Wisconsin, Minnesota, Illinois, Iowa and Nebraska between 1996-2009 adds up to about $6.9 billion. When the team broke the numbers out by Bt and non-Bt fields, they were initially surprised to find that 62 percent of Bt corn’s economic benefit — about $4.3 billion — went to non-Bt corn fields.
On second thought, however, the finding made sense. The primary benefit of Bt corn comes in the form of reduced yield losses, a benefit that Bt corn growers pay for in the form of Bt technology fees. As a result of Bt corn’s area-wide pest suppression, however, growers who plant non-Bt corn in their fields also experience yield savings without the cost of Bt technology fees, and thus receive more than half of the benefits from growing Bt corn in the region.

European corn borer moths cannot distinguish between Bt and non-Bt corn, so females lay eggs in both kinds of fields, explains University of Minnesota entomologist William Hutchison, the study’s chief author. Once eggs hatch in Bt corn, young borer larvae feed and die within 24 to 48 hours.

Because it is effective at controlling corn borers and other pests, Bt corn has been adopted on about 63 percent of all U.S. corn acres. As a result, corn borer numbers have also declined in neighboring non-Bt fields by 28 percent to 73 percent in Minnesota, Illinois and Wisconsin, depending on historical pest abundance and the level of Bt-corn adoption. The study also documents similar declines of the pest in Iowa and Nebraska. This is the first study to show a direct association between Bt corn use and an area-wide reduction in corn borer abundance.

The authors note that their analysis does not consider benefits for other important Midwestern crops affected by European corn borer, such as sweet corn, potatoes and green beans. “Additionally, environmental benefits from corn borer suppression are likely occurring, such as less insecticide use, but these benefits have yet to be documented,” says Hutchinson.

The authors were able to document the suppression of European corn borer in Minnesota, Illinois and Wisconsin because state entomologists have monitored pest populations for more than 45 years in those states. Pest suppression and similar benefits to adopters and non-adopters alike may be occurring as a result of the widespread use of transgenic insect-resistant crops in other parts of the U.S. and the world, but those benefits cannot be documented without adequate data.

Finally, the authors emphasize that sustaining the economic and environmental benefits of Bt corn and other transgenic crops for adopters and non-adopters alike depends on the continued stewardship of these technologies. Farmers, industry and regulators need to remain committed to planting non-Bt corn refuges to minimize the risk that corn borers will develop resistance to Bt corn. The Science study shows that Bt corn is more valuable to society than originally realized, which makes maintaining its effectiveness even more important.

Paul Mitchell | Newswise Science News
Further information:
http://www.wisc.edu

More articles from Agricultural and Forestry Science:

nachricht Raiding the rape field
23.05.2018 | Julius-Maximilians-Universität Würzburg

nachricht New technique reveals details of forest fire recovery
17.05.2018 | DOE/Brookhaven National Laboratory

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

 
Latest News

In focus: Climate adapted plants

25.05.2018 | Event News

Flow probes from the 3D printer

25.05.2018 | Machine Engineering

Less is more? Gene switch for healthy aging found

25.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>