Control strategies for common dandelion (Taraxacum officinale) in no-tillage cropping systems.

摘要

Common dandelion (Taraxacum officinale) has developed into a troublesome agronomic weed for no-tillage maize and soyabean producers in Michigan and throughout the north central region of USA. Field experiments were conducted on established populations of common dandelion in 2001-02 and 2002-03 to evaluate the effect of preplant and sequential herbicide applications on established populations of common dandelion. Preplant treatments of glyphosate or 2,4-D ester were applied early autumn, late autumn, early spring, and late spring. For both glyphosate and 2,4-D ester, the autumn applications were more effective than the spring applications. Glyphosate at 840 g a.i./ha was more effective than 2,4-D ester at 1120 g a.i./ha at each application timing. A single application of glyphosate or 2,4-D ester applied either in the autumn or spring did not provide season-long control of common dandelion. Sequential treatments of glyphosate following preplant applications of either glyphosate or 2,4-D ester provided season-long control of common dandelion..