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First Evidence That Weed Killers Improve Nutritional Value Of A Key Food Crop

Date:
July 9, 2009
Source:
American Chemical Society
Summary:
Scientists are reporting for the first time that the use of weed killers in farmers' fields boosts the nutritional value of an important food a crop. Application of two common herbicides to several varieties of sweet corn significantly increased the amount of key nutrients termed carotenoids in the corn kernels, according to a new study.

Use of certain weed killers on corn crops can boost levels of disease-fighting nutrients in corn kernels, researchers report.
Credit: U.S. Department of Agriculture

Scientists are reporting for the first time that the use of weed killers in farmers' fields boosts the nutritional value of an important food a crop. Application of two common herbicides to several varieties of sweet corn significantly increased the amount of key nutrients termed carotenoids in the corn kernels, according to a new study.

In the new study, Dean Kopsell and colleagues note that farmers grow about 240,000 acres of sweet corn in the United States each year, making it an important food crop. Corn is among only a few vegetable crops that are good sources of zeaxanthin carotenoids. Consuming carotenoid-rich vegetables may reduce the risk of age-related macular degeneration (a leading cause of vision loss among older people), heart disease, and cancer, the study notes.

The scientists exposed several varieties of sweet corn plants to the herbicide mesotrione or a combination of mesotrione and atrazine, another commonly used weed killer, and harvested mature corn 45 days later. Herbicide applications made the corn an even-better source of carotenoids, boosting levels in the mature kernels of some varieties by up to 15 percent. It specifically increased levels of lutein and zeaxanthin, the major carotenoids in sweet corn kernels, which studies have linked to a reduced risk of age-related macular degeneration.


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Kopsell et al. Increase in Nutritionally Important Sweet Corn Kernel Carotenoids following Mesotrione and Atrazine Applications. Journal of Agricultural and Food Chemistry, 2009; 090619124509017 DOI: 10.1021/jf9013313

Cite This Page:

American Chemical Society. "First Evidence That Weed Killers Improve Nutritional Value Of A Key Food Crop." ScienceDaily. ScienceDaily, 9 July 2009. <www.sciencedaily.com/releases/2009/07/090708094830.htm>.
American Chemical Society. (2009, July 9). First Evidence That Weed Killers Improve Nutritional Value Of A Key Food Crop. ScienceDaily. Retrieved September 3, 2014 from www.sciencedaily.com/releases/2009/07/090708094830.htm
American Chemical Society. "First Evidence That Weed Killers Improve Nutritional Value Of A Key Food Crop." ScienceDaily. www.sciencedaily.com/releases/2009/07/090708094830.htm (accessed September 3, 2014).

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