2011年12月5日星期一

Distinct and Status Bring New Features to Dicamba Herbicide

By: R.R. Hahn and P. J. Stachowski
Dicamba, a synthetic plant auxin or plant growth regulator (Site of Action Group 4 Herbicide), is the active ingredient in a product that most of us came to know as Banvel, a common field corn herbicide. Although this herbicide has been around for more than 40 years, it has undergone several changes that have resulted in new products. Banvel, the dimethylamine salt of dicamba, had a reputation for spray and/or vapor drift that could injure sensitive crops. This was of particular concern in the Midwest where corn and soybeans are often grown in adjacent fields. In an effort to minimize the effects of this off-target movement, the diglycolamine salt was introduced as Clarity for use on field corn. In addition, the sodium salt of dicamba has appeared in the pre-mixes NorthStar (with primisulfuron, the active ingredient in Beacon), Yukon (with halosulfuron, the active ingredient in Permit), Distinct (with diflufenzopyr), and most recently Status (with diflufenzopyr and isoxadifen).


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