Field day to focus on managing herbicide-resistant Palmer amaranth

Growers, crop consultants and educators interested in management of herbicide-resistant Palmer amaranth are encouraged to attend a Nebraska Extension field day, supported by the Nebraska Corn Board, from 8:30 a.m. to 1:30 p.m. July 12 near Shickley.

Palmer amaranth is a member of the pigweed family and is one of the most troublesome weeds in seed cornfields because of its resistance to atrazine and HPPD inhibitors. Greenhouse dose-response studies have confirmed resistance when atrazine and HPPD inhibitors were applied post-emergence. The weed is of particular concern in south-central Nebraska because of its proximity to intense seed corn production, which is heavily reliant on these herbicides.

At the field day, experiments will demonstrate how to control Palmer amaranth in field and seed corn production fields in Nebraska. Keynote speaker Jason Norsworthy, professor and endowed chair of weed science at the University of Arkansas, will share his experiences for management of glyphosate-resistant Palmer amaranth.

Three Certified Crop Adviser credits will be available. There is no cost to attend. However, pre-registration is required before 3 p.m. July 11. To register, visit http://agronomy.unl.edu/weedresistmgt.

Directions to the field day: From Geneva, go south on Highway 81 for seven miles. Turn west onto Highway 74 and drive 12 miles. Turn north on Road 2 and drive three miles. Turn west on Road Q and drive 0.1 mile. The farm field is on the north side of Road Q.

For more information, contact Amit Jhala at 402-472-1534 or amit.jhala@unl.edu.