alternate mode of action Is Key in managing
Glyphosate-resistant Pigweed
The list of resistant weeds continues to grow. Recent reports of glyphosate-resistant
Palmer pigweed in North Carolina and Georgia cotton fields have researchers again
emphasizing the importance of herbicide rotation, forcing growers to rethink
their weed management strategies.
an ounce of Prevention is Worth a Pound of Cure
Researchers and growers agree: the future of Roundup Ready® (RR™) crops
depends on proactively managing glyphosate resistance. Preventing the spread
of glyphosate-resistant pigweed and other troublesome weeds means utilizing
residual herbicides with different modes of action and saving glyphosate for
in-crop use — where it is suited best.
For optimum control of resistant pigweed, Sequence® herbicide applied early over
the top of cotton has an ideal fit. Sequence offers two powerful modes of action
and long-lasting residual control of problem weeds.
SeQuenCe BeneFITS:
• Controls more than 170
weeds in conventional
and RR cotton
• Dual mode of action with
contact and residual activity
• Down-to-the-roots burndown
• Flexible application timing
allows growers freedom
and choices
• Designed for no-till and
reduced-till cropping systems
• Excellent weed resistance
management tool
anDY KenDIG
Weed scientist | University of Missouri
“I’m stressing that growers do whatever they can to incorporate alternative modes
of action into their cotton weed control programs. The other magic word is a residual
herbicide. Glyphosate-susceptible Palmer amaranth is difficult enough to control,
so growers should be using residual alternatives. One of our best treatments—and
I’m saying this with substantial data behind it—has been a Dual MAGNUM® plus
glyphosate treatment, such as Sequence, applied over the top of cotton.”
m I K e PaT T e r S o n
Weed scientist | Auburn University
“Growers are not going to be able to use straight glyphosate forever because it
will encourage the development of resistant weeds. It’s a matter of time before
resistant pigweed species become a significant problem and over-the-top Dual
MAGNUM with glyphosate, such as Sequence, is going to be a very valuable tool
in managing herbicide resistance.”
Tom mueller
Weed scientist | University of Tennessee
“Glyphosate is always going to be used; it’s a foundation. It’s what we are applying
in addition that matters now. a Sequence treatment has an opportunity to help
a lot of people.”
Glyphosate-resistant
Palmer Pigweed
The Potential to Cause Intense Damage
Proven Success with Sequence
With RR cotton accounting for more than 60 percent of the cotton acreage in the
United States, glyphosate-resistant weeds have the potential to inflict tremendous
crop damage. According to researchers, the development of resistant pigweed is
especially alarming, since pigweed germinates throughout the year and competes
aggressively with cotton plants for water, nitrogen and sunlight.
Relying solely on glyphosate applications and neglecting to use early-season herbicides
with alternative modes of action can severely impact a grower’s bottom line. Sequence
gives growers a head start against early-season weeds, thereby saving time and money,
and helping preserve glyphosate as a valuable in-crop tool.
Growers who have used it praise Sequence
for its performance in the field. Applying
Sequence early can reduce plant stress and
extend the length of control, preventing
the spread of glyphosate-resistant
pigweed. Post-emergent applications
of Envoke, and post-directed treatments
of Suprend® or Caparol® help complete
a proven, superior weed resistance
management program.
Q u e n ti n D i x o n
Grower | Alapaha, Ga.
“I used Sequence on 100 percent of my acres last year, but I decided to go with
another program this season. As it turns out, I spent less money last year using
Sequence and Envoke® than I did this season because I had to keep going back
into the field this season and spray for weeds that kept coming through. Sequence
has the residual that Roundup® does not. I’ll probably go back to using Sequence on
all my acres again next year; I’ve learned my lesson.”
Ben Guthrie
Grower | Newellton, La.
“Sequence kept weeds down a lot
better than just Roundup alone. Its
performance was so evident that we
could ride by the field and see where our
Sequence applicator had unintentionally
turned off in the field.”
Palmer Amaranth Control**
21-35 DAA
PERCENT CONTROL
100
80
95.8
60
63
40
20
0
Sequence 2.5 pt./A
Touchdown Total 1.4 pt./A
SOURCE: Syngenta and University Trial Results 2004-2005.
** Average results of three trials conducted in LA, NC and TN.
W. P. B r o w n I V
Grower | Schalter, Miss.
“The biggest benefit with Sequence is if
you put it out and it starts raining and
you don’t have time to get back in the
field—you’re covered with Sequence.
We really like Sequence. We use it
as an insurance policy.”
B o b D a vis o n
Grower | Boston, Ga.
“This season Sequence held my cotton
longer than I have ever had a field stay
clean. When we actually rolled in with
the hoods, it was a no brainer that one
hooding was going to lay the field by.”
For more information, visit the Syngenta Crop Protection Web site at www.syngentacropprotection.com or FarmAssist at www.cotton.farmassist.com.
©2005 Syngenta. Syngenta Crop Protection, Inc. Greensboro, NC 27409. Important: Always read and follow directions before buying and using these products.
Sequence®, Suprend®, Envoke®, Caparol®, Dual MAGNUM® and the Syngenta logo are trademarks of a Syngenta Group Company.
Roundup Ready® is a registered trademark of Monsanto Technology LLC. RR™ is a trademark of Monsanto Technology LLC.
Roundup® is a registered product of Monsanto Technology LLC.
GS 405.51405 12/05
SCP 120-00027-A