Resistant Palmer Amaranth Management Field Day at Shickley
Nebraska Extension will be hosting a Resistant Palmer Amaranth Management Field Day Tuesday, July 12, near Shickley to demonstrate control options in corn. Keynote speaker will be Jason Norsworthy, professor and endowed chair of Weed Science at the Unversity of Arkansas. Norsworth has documented eight herbicide-resistant weeds in Arkansas, including glyphosate-resistant Palmer amaranth.
Palmer amaranth, a member of the pigweed (Amaranthaceae) family, is one of the most troublesome weeds in Nebraska corn fields. Palmer amaranth resistant to atrazine and HPPD-inhibiting herbicides (Callisto, Laudis, Impact) in south central Nebraska is of particular concern because of the proximity to intense seed corn production, which is heavily reliant on these herbicides for weed control. Greenhouse dose-response studies have confirmed resistance in plants where atrazine and HPPD inhibitors were applied post-emergence.
The field day will include field experiments demonstrating how to control resistant Palmer amaranth in field and seed corn production fields in Nebraska. The event, which is co-sponsored by Nebraska Extension and the Nebraska Corn Board, begins with registration, rolls and coffee at 8:30 a.m. following by the program at 9 a.m. Field tours start at 9:25. The free lunch will be at noon.
On-Site Weed Management Demonstrations
- Tank mixing atrazine with Callisto or Balance PRO at different rates for control of Palmer amaranth
- Tank mixing Atrazine with Callisto, Laudis, or Armezone applied post-emergence for control of Palmer amaranth
- Herbicide programs for resistant Palmer amaranth control in seed corn
- Management of Palmer amaranth in Roundup Ready Corn and in Liberty Link Corn
- DiFlexx and DiFlexx DUO for control of resistant Palmer amaranth
- Armezon PRO for control of resistant Palmer amaranth
- Understanding effect of tillage/herbicides on Palmer amaranth emergence
- Overlapping residual herbicides for Palmer amaranth control in field corn
More Info & Registration
From Geneva, go south on Hwy 81 for 7 miles, turn west onto Hwy 74 and travel 12 miles; then turn north on Road 2 for three miles. Turn west on Road Q for 0.1 mile. The field day site is on the north side of Road Q.