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Weed Killers can Improve Nutritional Value of Important Food Crop

by VR Sreeraman on July 10, 2009 at 5:13 PM
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 Weed Killers can Improve Nutritional Value of Important Food Crop

In a new study, scientists have obtained first evidence that the use of weed killers in farmers' fields boosts the nutritional value of an important food crop.

The study determined that the application of two common herbicides to several varieties of sweet corn significantly increased the amount of key nutrients termed carotenoids in the corn kernels.

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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 noted.
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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.

Source: ANI
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