2009-08-04 | permalink

Herbicide diversity needed to keep Roundup effective

Using a diverse herbicide application strategy may increase production costs, but a five-year Purdue University study shows the practice will drastically reduce weeds and seeds that are resistant to a popular herbicide. Excess usage of glyphosate-resistant crops has led to weeds, such as marestail, that also are resistant to glyphosate, the herbicide used in Roundup. Bill Johnson, a Purdue associate professor of weed science, said changing management practices can almost eliminate resistant marestail and its viable seeds in the soil.

• University of Purdue, USA: Herbicide diversity needed to keep Roundup effective
• University of Illinois, USA: Understanding how weeds are resistant to herbicides
• University of Arkansas, USA: Herbicide resistant pigweed dominates farmers’ concerns at research field day
• University of Arkansas, USA: Resistant weeds research among rice field day topics