Lyrics Turn out the lights, the partys over They say that all good things must end Lets call it a night the partys over And tomorrow starts the same old thing again Turn out the lights, the partys over They say that all good things must end Lets call it a night the partys over And tomorrow starts the same old thing again ? ?
WATERHEMP & PALMER AMARANTH BIOLOGY CREATE CHALLENGES FOR SOYBEAN GROWERS Prolific seed producers. Seed scattered with combines. Dioecious (male & female plants). Pollen flow contributes to dispersal. Multiple events of plant emergence throughout the season. Palmer grows rapidly and difficult to control: 3 tall with Flexstar 5 to 6 tall for Ignite in LL soybean.
TYPES OF HERBICIDE RESISTANCE IN MAJOR PIGWEED SPECIES IN THE US MODE/SITE OF ACTION SMOOTH PIGWEED WATERHEMP SPP PALMER AMARANTH ALSXXX GLYCINE-XX PS IIXXX DNA--X ALS + GLYCINE-XX ALS + PS IIXX- ALS + PPO-X- ALS + PS II + PPO-X- ALS + PPO + GLYCINE-X- Most of these confirmed based on criteria in International Survey of Herbicide Resistant Weeds (11-07-09) X = Resistance has been documented.
HERBICIDE OPTIONS FOR WATERHEMP CONTROL IN SOYBEAN Authority Assist Authority First / Sonic Authority MTZ Boundary Envive Gangster Linex Prefix Spartan Valor Sx / Encompass Valor XLT Cobra Flexstar Reflex Ultra Blazer SOIL APPLIEDPOSTEMERGENCE
HERBICIDE OPTIONS FOR WATERHEMP CONTROL IN SOYBEANS Authority Assist Authority First / Sonic Authority MTZ Boundary Envive Gangster SOIL APPLIED POSTEMERGENCE Cobra Flexstar Linen Prefix Spartan Valor Sx / Encompass Valor XLT Reflex Ultra Blazer
HERBICIDE OPTIONS FOR PALMER AMARANTH CONTROL IN SOYBEANS Authority First/Sonic Authority MTZ Valor Sx / Encompass Valor XLT SOIL APPLIED POSTEMERGENCE Dual Intrro Prefix Prowl Sencor Treflan > Ignite in LL soybeans > Cobra Flexstar Ultra Blazer
Burndown Control of Marestail 2,4-D ester Sharpen Optill Ignite
UK Weed Sci Corn yield reduced 42 to 60 % due to interference from volunteer corn plants (Source Univ. of Illinois) 1 Volunteer Corn Clump/8 ft 2 Reduces Soybean Yield 25% Source: Becket & Stoller 1988 VOLUNTEER CORN IS A WEED
Herbicide Options for Controlling Unwanted Corn Plants Prior to Planting Field Corn Herbicide Approx. Cost/A Previous Corn Hybrid Conventional Hybrid Roundup Ready Liberty Link Clearfield IMI-Corn Glyphosate$ 4 - 15/A++X Paraquat + Photo System II Inhibitor (e.g.. Atrazine, Linex, Metribuzin) $ 11 - 22/A++++ Select MAX *$9/A+++++ + = Recommended ++ = Highly recommended X = No control UK Weed Sci * SELECT MAX Replant no sooner than 6 days after application
Soybean Herbicides Labeled For Controlling Volunteer Corn Postemergence HerbicideCost/A*Max Corn Height Arrow (4-6 oz/A$ 4.50 – 7.0/A4 to 12 Assure II (4 to 8 oz/A)$ 4.50 – 8.75/A18 to 30 Fusion (4 to 6 oz/A)$ 5.25 - 7.75/A24 Poast (0.75 pt/A)$ 6.75/A20 Select Max,etc (6 / 9 / 12 oz/A)$ 6.25- 12.50/A(12) (24) (36) ** Glyphosate (0.56 to 10.75 lbae/A)$ 2.50 - 7.75/A 12 to 20 ** Sequence (2.5 pt/A)$?/A18 * * Will not Control Glyphosate -Tolerant Volunteer Corn. * Price does not include cost of application or adjuvants UK Weed Sci