Fifty years of atrazine in Iowa: Benefits, impacts, and current status

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2010-12-01
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Fawcett, Richard
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Proceedings of the Integrated Crop Management Conference
Iowa State University Conferences and Symposia

The Iowa State University Integrated Crop Management Conference is Iowa's premier crop production education event. No other program in Iowa brings together the diverse range of topics, slate of expert presenters and results of the latest University research.

The ICM Conference offers workshops focusing on the latest in crop production technology. Experts from Iowa and surrounding states will provide research updates and results in soil fertility, soil and water management, crop production and pest management.

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Atrazine was first registered for use in the U.S. in 1958. It quickly became the preferred herbicide of corn growers, controlling both grasses and broadleaf weeds and being used either as a postemergence or preemergence application, unlike the primary alternative herbicide of the time, 2,4-D (Muller 2008). Over 50 years later, atrazine is still an important weed management tool for corn growers, and was the most widely used herbicide until recently when only glyphosate was used on more acres.

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