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.
New Soybean Herbicides for 2017
March 6, 2017
Information on new soybean herbicides, incuding their modes of action
New Corn Herbicides for 2017
February 24, 2017
Information on new herbicides for corn that will be available for the 2017 crop production season.
2017 Chart for Selection of Herbicides Based on Site of Action
February 2, 2017
Management of glyphosate-resistant weeds is now the greatest challenge for Nebraska crop producers and land managers. The 2017 Herbicide Classification Chart from Take Action Against Weeds is an easy means for identifying herbicide site of action to avoid repeated use of the same action on the same field.
Jhala Receives Early Career Outstanding Weed Scientist Award
February 1, 2017
Amit Jhala, Nebraska Extension weed management specialist and frequent contributor to CropWatch, has been honored with an Early Career Outstanding Weed Scientist Award by the Weed Science Society of America. This award recognizes outstanding contributions made by an early career weed scientist in research, extension, and/or teaching in the US. Jhala joined the University of Nebraska-Lincoln faculty in 2012 and has a split appointment in research and extension in the Department of Agronomy and Horticulture.
Understanding the Roundup Ready 2 Xtend™ Soybean Weed Management System
November 11, 2016
A new soybean cultivar with dicamba-tolerant Roundup Ready 2 Xtend™ soybean is expected to be planted on over 15 million acres in 2017, offering an additional means of managing herbicide-resistant weeds. The weed management system, which was tested the last four years in Nebraska trials, provides for use of Roundup Xtend™ of XtendiMax™ (dicamba).