A Challenge To Agriculture
(Continued from Pago 10)
other members of the ALS
class. However, it’s like rolling
dice if you roll it long
enough, it’s simply a matter of
time before you get “snake
eyes” or cross resistance
develops.
Preventive programs require
more management and possibly
accepting some change in the
way weed control programs are
conducted. Programs for pre
venting herbicide resistance
should address several areas:
• Rotate herbicide modes of
action
• Use shorter residual
products
• Use tank-mixtures or
sequential mixes with different
modes of action
Table 2. Plan Tank-mix Strategy. This table provides examples of lieibicide piograms foi coni and then
potential for preventing resistance For example program 1 (Bicep - Prowl i includes thiee different herbicides ian anne
Dual and Prowll with three different inodes ot action fPSI Shoot and Root inlnbitoisi Howeiei foi TR
lambsquarters only one of the threa herbicides is eft ecu ve i Prowl i for pigweed all three aie effective and lot giant
[oxtail two (Dual and Prowl iof the three are effective Ir> to select programs where more than one herbicide class is
effective especially for weeds like pigweed
Weeds
TR Lambsquarters
Pigweed
Giant foxtail
6SI
GSI Feed Bins
We assemble, deliver and
set up bins on your farm.
• Weather tight die-formed roof
• Stronger engineered sidewalls
• Ground controlled fill caps
• Galvanized roll-formed legs
• Engineered leg braced systems
• Fast flowing hopper bottom
Feed Deliv6!
tlejCrlO Sy s t ems
Flex-Flo feed delivery systems are known world wide for their reliability and long
lasting performance. Using flexible augers for feed transfers has proven to be
the clear leader for two decades. Designed for easy installation and trouble free
operation. Flex-Flo can drastically cut your time, labor and management costs.
Herbicide Resistance:
• Use nonchemical methods
of control such as cultivation.
The emphasis or at least
starting place for resistance
management should be identifi
cation of herbicide class (Table
1). The annual rotation of these
classes may be key to prevent
ing resistance. Tank-mix part
ners from different classes that
arc effective on problem weeds
will also help (see Table 2).
However, effective tank
mixtures from more than one
class are not available for all
weeds and no resistance man
agement strategy can stand
alone.
Multiple tactics that include
herbicide rotation, effective
Program 1
Bicep + Prowl
o*o-1 = 1
1-I*l =3
o+l/1 =2
tank mixtures, and nonchemi
cal methods of weed manage
ment will be most successful.
Although many producers
may select the “business as
usual” philosophy and hope
that technology keeps up, the
discovery and development of
effective new heibicide classesT
and families does not appear
right around the comer, and
some effective older products
could face additional restric
tions or even removal from cer
tain markets.
Most weed scientists agree
that if we don’t plan and man
age for resistance today, we
will surely lose the value of
some effective herbicide pro
ducts or families and be faced
with fewer more expensive
options in the future.
Program 2
Harness Ktra Bam el post
Broadstnke+ Dual
I+o= 1
1+ 1 =2
o+l = 1
Corn Talk, Lancaster Farming, Saturday, March 18, 1995—Page
Pi ogram 3
o+o+l
1 1+ 1
1-o+o= 1
ms^wniEiUD}'
Westfield
4”-6”-7”-8”-10” Diamet
For Permanent or Semi-'
• At your grain bins or
• In drying set-ups
• Around the dairy bam
• In (eedlots
• At feedmills or elevatoi
Westfield offers the large:
choice of Augers in the
industry. Choose the exai
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job. Select from 6,7, 8
10 inch diameters, in len)
from 26 to 71 feet. Select
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Don’t Restrict
Atrazine Use
GREENSBORO,
N.C.—During the NCGA
Leadership program, the
1994-1995 class participated in
a comprehensive seminar on
the future of the status of
atrazine.
Since that time, the Environ
mental Protection Ageny
(EPA) has announced plans to
conduct a special review of
atrazine, simazine and cyana
zine. In this review process, the
EPA will review the informa
tion regarding the technical
and scientific aspects of these
products.
Corn growers have the
opportunity to contribute to the
review process by voluntarily
commenting on the product
use and economic impact on
fanners. NCGA members who
are interested in commenting
may write the EPA before
March 23.
If you write to the EPA, you
may wish to include a descrip
tion of how atrazine label
changes and best management
practices (BMPs) have
impacted water quality in your
farming operation. Other
points which could be men
tioned include:
•Economics and effective-
Westfield Grain Augers
ness
•Broad spectrum weed
control
•Grass control
•Conservation tillage
application
•A tank mix partner.
Further restrictions on atra
zine would create a hardship
on com growers without safe,
economically viable alterna
tives. Additional restrictions
on atrazine could also have an
impact on the use of more than
20 products currently on the
market, including: Aatrex®,
Extrazine®!!, Sutazine®,
Shotgun™, Bicep®, Marks
man®, Surpass® 100, Bullet®,
Laddok®, Buctril®+Atrazine,
Lariat®, Guardsman®,
Hamess®Xtra.
Letters to the EPA should
be addressed as follows: Pub
lic Response and Program Re
sources Branch (OPP-30000-
60), Field Operations Division
(7506 C), Office of Pesticide
Programs, Environmental Pro
tection Agency, 401 M. St.
SW, Washington, DC 20460.
It is important to make sure
OPP-30000-60 is written on
both the letter and the
envelope.
Hourti Mon thru Fri 7 - 5
Sat 7:30 - 11s30
231