Fulton County, KY 2011. Notice how the weed is been chopped (layed over) and sprayed (no leaves) and is still growing. Photo from next to farmer’s grain facility
Fayette County outlier = Came in switchgrass seed.
Fulton County, KY 2011
Not high enough rate of water.Fulton County, KY 2011
Flexstar is the one that provided the best control of the PPO’s in our plots and Ignite did very well, as well.
Palmer Pigweed 2012
ScriptThis slideset is to help farmers be able to identifyand effectively control Palmer pigweed. It isresistant to glyphosate, so we are having to findalternative methods of control. The followingwill walk you through the process of Need,Identification, and Control.
History of Palmer Amaranth• Found in Lauderdale County, TN in 2006• Across West TN in 2008• Couldn’t kill certain Pigweeds in Fulton County in 2008• Confirmed Resistance in 2009 in Fulton County• Outbreak in 2010• Began Intense Focus in 2011
Enter question text...Can You Identify These Pigweeds? 1 2 31. Photo 12. Photo 33. Photo 2 33% 33% 33% 1 3 2 o o o ot ot ot Ph Ph Ph
Waterhemp & Palmer Amaranth Distribution in KY (Co. Agent Survey 2010) Waterhemp Palmer Amaranth Waterhemp & Palmer AmaranthLast Updated 11-23-2010
Waterhemp & Palmer Amaranth Distribution in KY (Co. Agent Survey 2011) Waterhemp Palmer Amaranth Waterhemp & Palmer AmaranthLast Updated 12-5-11
Soil-Residual Herbicides For Palmer AmaranthSoil Residual Herbicide Site of Activity P.AmaranthAuthority Assist PPO + ALS ─Authority First / Sonic PPO + ALS XAuthority MTZ PPO + PS II XBoundary PS II + Cell Div . XEnvive PPO +ALS + ALS XGangster PPO + ALS ─Prefix PPO + Cell Div. XSpartan Charge PPO + PPO ─Treflan Microtubule XValor SX PPO XValor XLT PPO & ALS X
Postemergence Soybean Herbicides for Waterhemp & Palmer AmaranthPost Site of Activity P. AmaranthHerbicideUltra Blazer PPO ─Cobra PPO ─Flexstar PPO XFlexstar GT PPO + EPSP X GlutamineIgnite X Synthetase
KIH 485 (pyroxasulfone) Initial Discovery & MARKETING IN US Development (2012 ?) • BASF (Zidua)• KUMIAI Chemical Industry Co, Ltd • FMC (Anthem)• IHARA Chemical Industry Co.,Ltd • VALENT (Fierce)
GR Pigweed Summary• Pre Emergence Options • Boundary (1.5 pts) • Envive (2.5 ozs) • Prefix (1 qts) • Valor (3 ozs) • Authority MTZ (18 ozs) • Valor XLT ( 3 ozs)
GR Pigweed Summary• Post Options: • 1 to 3” Palmer amaranth • Flexstar (1.5 pts) • Cobra (12 ozs) • Blazer (1.5 pts)
Pre Partially Activated and Post a Few Days Late Steckel 2010
Pre Washed Away and Post a Few Days Late Steckel 2010
The Difference of 2 Days!Flexstar on 6” Palmer Flexstar on 3” Palmer Steckel 2010
What about Ignite?• Ignite (glufosinate) is a viable alternative• Needs to be applied during middle of the day• Use minimum of 15 gallons of water• New for this year – – Sequential Application – 22-36 oz fb 22-29 oz
PPO’s Ignite• 1-3 tall Palmer • 1-6 tall Palmer• Multiple applications • MUST USE 15gal/Ac! may be necessary • Try to apply in the• Sequential applications middle of the day prohibited • Can use sequential application