Common dandelion (Taraxacum officinale) control with postemergence herbicides in no-tillage glufosinate-resistant corn.

摘要

Common dandelion (Taraxacum officinale) has developed into a troublesome agronomic weed for no-tillage maize producers. A postemergence herbicide application is often required to reduce common dandelion competition. Field experiments were conducted in 2002 and 2003 to evaluate 22 postemergence herbicide treatments for efficacy on established populations of common dandelion in no-tillage maize. All herbicides were applied to five- to six-collar maize at registered rates with typical adjuvants. At 28 days after treatment (DAT) the most effective treatments included glufosinate and mesotrione providing approximately 76% control of common dandelion. All other herbicide treatments provided less than 40% common dandelion control 28 DAT. Common dandelion control was evaluated 56 DAT when regrowth of treated plants was observed for some herbicide treatments. AT 56 DAT, dicamba + diflufenzopyr was the most effective treatment, providing 83% control of common dandelion. In 2002, all herbicide treatments, with the exception of flumiclorac, resulted in maize yields greater than the nontreated control..