Postemergence (Rescue) Herbicide Options for Control of Glyphosate-Resistant Marestail in Corn and Soybean
May 24, 2017
Several factors have contributed to delayed applications and marestail escapes this spring. Includes recommendations for timely postemergence control in corn and soybean.
New Research Quantifies the Dispersal of Glyphosate Resistance Trait Through Pollen-Mediated Gene Flow
May 18, 2017
The pollen-mediated gene flow was detected 38% to 54% at 0.1 meter distance and 5% to 9% at 50 meters, the highest distance tested in this study.
Status of Herbicide-Resistant Weeds in Nebraska
March 20, 2017
Nine weed species in Nebraska have now evolved resistance to at least one group of herbicides. Six weed species — common ragweed, common waterhemp, marestail, kochia, giant ragweed, and Palmer amaranth — have confirmed resistance to glyphosate. Rotate herbicide sites of action and weed control practice to avoid contributing to this trend.
Glyphosate-Resistant Palmer Amaranth Confirmed in South-Central Nebraska
March 15, 2017
Palmer amaranth (Amaranthus palmeri S. Wats.) is a C4 dioecious species (separate male and female plants) native to the southwestern United States.
When is a Good Time to Scout and Control Glyphosate-Resistant Marestail?
March 8, 2017
Marestail, also known as horseweed or Canada fleabane, is a winter or summer annual weed in Nebraska. Historically, marestail was found in waste area, field edges, along roadsides, and railway tracks; however, no-till crop production systems over the last 20 years favor marestail germination and establishment in agronomic crops in Nebraska.