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NEW HERBICIDE
PRODUCT UPDATE
William S. Curran
Assistant Professor
Weed Science
Penn State
There have been a number of
major label changes or new for
mulations that com and soy
bean growers should be aware
of this year.
I have summarized the
important points on each
below. Always be sure to con
sult the label before applying
any of these products.
Cyanazine products (Bladex,
Extrazine, and Cycle) will con
tain new “best management
practice” guidelines for ground
and surface water protection.
The changes are similar to what
atrazine went through in 1993.
The following is an overview of
the major changes.
Rate restrictions;
• a. Do not apply more than
6.5 pounds total cyanazine per
acre per year to any land area.
• b. On highly credible land
(HEL), if plant residues are less
than 30 percent, do not apply
more than 3 pounds total cyana
zine per acre per year.
Setback and buffer zones:
• a. Do not mix, load, rinse,
or wash within 50 feet of any
well unless specific safeguards
are in place (see a label for spe
cific requirements).
• b. Do not apply aerially or
by ground within 66 feet of the
points where field surface
It Pays To Plant With A
ZIMMERMAN’S FARM SERVICE
'A Mile West Off Rt. 501 On School Rd., Bethel, Pa.
717-933-4114
water runoff enters perennial or
intermittent streams and rivers
or within 200 feet around natur
al or impounded lakes or reser
voirs. The setback or buffer
must planted to a crop or seeded
with grass or other suitable crop
on HEL.
Bicep II is a formulation of
Bicep (atrazine plus metolach
lor) that contains a safening
agent to increase com protec
tion. This product may not be
widely marketed in the
Northeast.
Buctril Gel is a gel encapsu
lated formulation of bromoxy
nil (Buctril) that increases user
and environmental safety.
Concert SP is a water disper
able granule containing 12.5
percent chlorimuron (Classic)
plus 12.5 percent thifensulfu
ron (Pinnacle). The DuPont
product will be sold as 2-ounce
soluble packs treating four
acres each. This product is
labeled for use in soybeans.
Dual II is a formulation of
metolachlor that contains a
safening agent to increase com
protection. This product may or
may not be widely marketed in
the Northeast.
Frontier 7.5 L is labeled for
com and should be labeled for
use in soybeans by the 1994
season. Frontier (dimethena
mid) is similar to Dual or Lasso
in weed control activity, but is
used at about 60 percent of the
equivalent metolachlor active
ingredient (Dual) rate. Use
rates for soybeans should be
similar to those used in com.
Guardsman 5E is a new pre-
WHITE PLANTER
■ Air Metering and Finger Pickup
■ Double Frame Models
mixture from Sandoz that con
tains 2.33 pounds dimethena
mid (Frontier) plus 2.67 pounds
atrazine. The use rate is 2.5 to 5
pints per acre. This product is
labeled for use in com.
Harmony Extra 75DF
(thifensulfuron plus tribenu
ron) may be applied early pre
plant (at least 45 days ahead of
planting) to increase knock
down activity in front of com or
soybeans. Harmony Extra
would typically be tank-mixed
with Roundup or other system
ic herbicides for increased
activity on problem perennial
weeds such as wild garlic,
briars, and dock species.
Pentagon 60DG is a 60 per
cent active pan granulated for
mulation of pendimethalin
(Prowl) from American Cyana
mid labeled for use in com and
soybeans.
Sencor DF received a 2(ee)
label for a reduced rate applica
tion for control of common and
mouseear chickweed, red dead
nettle, henbit, and Virginia pep
perweed in established alfalfa.
The rate is 'A to \-'A pounds of
75DF per acre. Sencor is mark
eted by Miles Inc. of Kansas
City, Mo.
Synchrony STS is a water
dispersible granule containing
three parts chlorimuron to one
part thifensulfuron. This DuP
ont product is targeted for use
with STS (sulfonylurea
tolerant) soybean varieties.
■ Vertical Fold
■ Mounted
White
BY WHITE-NEW IDEA
Vanquish 4S is a diglycola
mine salt (DGA) formulation of
dicamba that is now labeled for
use on grass pastures. The
reduced vapor pressure charac
teristics of Vanquish may be
promoted as a means of reduc
ing the vapor drift potential of
dicamba.
Chlorimuron Premixes.
Dupont markets several diffe
rent formulations of soybean
herbicides that contain the
active ingredient chlorimuron
(Classic). These products con
tain either linuron (Lorox) or
metribuzin (Lexone) in addi
tion to the chlorimuron
component.
In order to avoid some of the
confusion, here’s a quick over
view of these chlorimuron pre
mix formulations:
• Canopy 75DG 6:1
metribuzin/chlorimuronused at
4 to 8 ounces/acre 10-month
com and alfalfa.
• Preview 75DG 10:1
metribuzin/chlorimuronused at
Table 1. Recrop restrictions in months for chlorimoron pre
mixes for soils with a pH less than 6.8. Higher pH soils may
require an increased waiting period for safe recrop.
Herbicide Alfalfa Clover Corn Sorghum
Cmm
Preview
Gemini
Lorox Plus
1915
In Stock - READY TO GO!
Precision
HARVESTING
The Model 1915 self-propelled forage harvester
makes it easy to make high-quality forage. The
rugged 26-inch-wide cutterhead uses 12 full-width
knives to deliver a fine, uniform chop for the best
quality feed. And, the Accucut" knife sharpening
system makes it easy to chop at peak efficiency.
Stop in and get the details.
QUALITY USED EQUIPMENT FOR SALE
• NH-1495 Diesel Engine, Hydro, cab, AC. Haybine
• Hesston 1130 Mower Conditioner
• IH 1086 Tractor • NH 791 Spreader
• (4) NH 489 Hay bines • Gehl 99 Blower
• NH 851 Round Baler
• NH 1034 Bale Wagon
• NH 144 Windrow Inverter
5 to 8 ounces/acre.
• Gemini 60DG 12:1
linuron/chlorimuron used at 8
to 16 ounces/acre.
• Lorox Plus 60DG 18:1
linuron/chlorimuron used at 12
to 16 ounces/acre.
Canopy and Preview are bet
ter suited for the finer-textured
soils (>2 percent organic mat
ter) whereas because of the
linuron, Gemini and Lorox Plus
are typically used on the
coarser-textured soil areas.
Linuron is more easily tied up
to clay and organic matter.
Canopy and Preview are slight
ly broader in spectrum than
Gemini or Lorox Plus and prob
ably require less rainfall for
mobilization. However,
because they contain a triazine,
Canopy and Preview may be
weaker on triazine-resistant
weeds, especially lambsquar
ters. In addition, recrop restric
tions can differ slightly with the
four products as shown in the
following table:
10 12 10 12
10 12 10
187 12 10 10
(Turn to Page 25)