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Printer Friendly Print First evidence that weed killers improve nutritional value of a key food crop

First evidence that weed killers improve nutritional value of a key food crop

July 09, 2009

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 study scheduled for publication in the July 22 issue of ACS' Journal of Agricultural and Food Chemistry, a bi-weekly publication.

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.

American Chemical Society



Related Sweet Corn Current Events and Sweet Corn News Articles
Purdue study suggests warmer temperatures could lead to a boom in corn pests
Climate change could provide the warmer weather pests prefer, leading to an increase in populations that feed on corn and other crops, according to a new study.

Study a step toward disease-resistant crops, sustainability
A five-year study that could help increase disease resistance, stress tolerance and plant yields is under way at Purdue University.

Can hemp help the everglades?
Within Southern Florida, soil and water conditions indicate potential for leaching from the use of atrazine-based herbicides in corn crops. Scientists from USDA-Agricultural Research Service (ARS) and University of Florida conducted studies to evaluate the specific groundwater risk from atrazine use by focusing on a specific cover crop that seems to have the potential to greatly reduce that risk. The crop is called sunn hemp. It's a tall, herbaceous annual that grows rapidly to a height of 6 to 7 feet.
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