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What’s
New for Agronomic Weed Control 2001 (3/12/01) Industry News BASF acquired American Cyanamid crop protection business in mid-year 2000. All former Cyanamid products including, Prowl, Pursuit, Scepter, Raptor, Lightning, Steel, Extreme, Backdraft, Counter, etc. now will be marketed and serviced by BASF. Syngenta
is the merger of the ag divisions of Novartis and Zeneca and was
established November 2000. All
of the herbicide products and services from the two former companies now
will be under Syngenta except the acetochlor products (see Dow Agro.) Dow
AgroSciences has acquired acetochlor from Zeneca because of the
recent merger. TopNotch, FulTime, and Surpass
will be controlled by Dow Agro.
This line of herbicides will likely expand over the next few years. Glyphosate
products. A number of new
glyphosate containing products will be available in 2001 and over the next
several years. Monsanto, the
maker of Roundup, is marketing some of these new products while other
products are from other companies. (Monsanto’s
Roundup patent expired in late September 2000.)
Be cautious, different formulations are available and NOT ALL
glyphosate products are labeled for use over Roundup Ready crops. CORN
LabeledBicep Magnum TR 4.59L and Broadstrike + Dual 7.67E (Syngenta/Novartis) will be discontinued with remaining supplies available over the next few seasons. Python and Hornet (Dow Agro.) will remain available. Degree
3.8CS (Monsanto) contains the same active ingredient as Harness
but is a new encapsulated formulation of acetochlor designed to extend
soil-residual control of annual grass species.
(Degree may not control pigweed and lambsquarters as well as
Harness due to the changed formulation).
Degree will be positioned to compete with Dual II Magnum and Top
Notch in the conservation tillage and early preplant market.
Monsanto claims the release of acetochlor from the encapsulation is
triggered primarily by soil temperature.
As the soil temperature warms up, the product becomes available to
control weeds, while under cold conditions, it remains unavailable. Define
60DF (Aventis/Bayer) is the single active ingredient of
flufenacet (which is contained in Axiom and Domain).
Define is similar to Dual, Micro-Tech, Harness, Frontier, etc., and
provides preemergence control of many annual grasses.
It provides only partial control of some common annual broadleaves
and yellow nutsedge, so tank-mixing or other control measures will be
necessary. Common use rates
for Pa. soils will be 14-18 oz/A. Degree
Xtra 4.04EC (Monsanto) is a premix of Degree (encapsulated
acetochlor) and atrazine. It
will provide preemergence control of annual grasses and broadleaves. Hornet
(Dow AgroSciences) will be reformulated as Hornet 68.5WDG instead of Hornet 85.6WG.
The new use rates for Hornet WDG will be 2 to 6 oz/A.
Be aware of which product you use since both will likely be
available until old formulation stocks are depleted. Outlook
6EC (BASF) contains dimethenamid-p which is the more active
isomer of dimethenamid (Frontier, Guardsman, and LeadOff).
Since it is more active, the use rates will be lower by
approximately 55%. For
example, 28 fl. oz. of Frontier would be equivalent to about 16 fl. oz. of
Outlook. Outlook controls the same weed spectrum as Frontier; providing
good control of annual grasses, some broadleaves and nutsedge. Pendimax
3.3EC (Dow AgroSciences) contains pendimethalin, the same
active ingredient in Prowl. Its
label and uses are very similar to that of Prowl.
Pendimax can also be used in soybean. ReadyMaster
ATZ 4L (Monsanto) is a premix of glyphosate and atrazine for
postemergence application to Roundup Ready corn.
The formulation contains 2 lb ai/gal. each of glyphosate and
atrazine. Use rates will
range from 1.5 to 2 qt/A. Expect other ReadyMaster products containing Harness in the
upcoming years for use in Roundup Ready corn. Steadfast
75DF (DuPont) is a premix of nicosulfuron (Accent) and rimsulfuron
(Matrix). It is similar to Basis Gold but does not contain atrazine.
Steadfast will be applied early post at 0.75 oz/A to corn before 12
inches tall and will control many common annual broadleaves and grasses.
It is weak on lambsquarters, velvetleaf, cocklebur, crabgrass, and
nutsedge, so use tank-mix options or other strategies to control these
weeds. Include necessary adjuvants and be cautious of OP insecticide
interactions. PendingBalance
75WDG, Balance Pro 4L (Aventis), and Epic (Bayer) are not
yet labeled East of Ohio. US-EPA
and State Depts. of Agriculture are still reviewing these products for use
in Pennsylvania and other areas of the northeast. – Balance labeled
5/01/01 Callisto
(ZA 1296) (Syngenta/Zeneca) is an experimental broadleaf
herbicide with the chemical name of mesotrione.
It is in the callistemone herbicide family and has a mode of action
that targets the HPPD enzyme and thus “bleaches” the weeds (similar to
Balance). Callisto has
activity on many annual and some perennial broadleaves and large
crabgrass. It can be applied
either pre or postemergence and has a low use rate (about 3 oz/A).
It will likely be sold as a single active ingredient and in a
premix with a pre-grass herbicide. Limited
quantities may be available for the 2001 season, pending registration. SOYBEAN
LabeledDomain,
Boundary, Backdraft, Extreme, etc. are some of the pre and post
pre-mix products available to capture some of the Roundup Ready soybean
market. Additional pre-mix
products will continue to come. CORN and SOYBEAN
LabeledRoundup Ultra MAX 5L (Monsanto) has been added to the Roundup product line. Ultra Max is a more concentrated (5 lb ai/gal) isopropylamine glyphosate product but is essentially the same as Roundup Ultra 4L. Be cautious of use rates, for example 32 fl oz of Ultra = 26 fl oz of Ultra Max. It can be used over Roundup Ready crops, or as a burndown or spot treatment in many other crops. Touchdown
IQ 4L (Syngenta) is a new formulation of glyphosate.
Touchdown IQ contains the active ingredient diammonium glyphosate
plus special adjuvants (termed IQ Technology).
Like Roundup Ultra, Touchdown IQ is a broadspectrum herbicide and
can be applied over Roundup Ready soybeans and corn.
It also can be used as a burndown or spot treatment in many other
crops. The common use rate
will be 1 qt/A. The old
Touchdown 5 (sulfosate) product may still be available until supplies are
depleted. OTHER PRODUCT NOTES
Gramoxone Max 3L (Syngenta) is a more concentrated formulation of Gramoxone. The use of Gramoxone Max will remain the same as Gramoxone Extra 2.5L. Both will be available this season, so be cautious of use rates. Harmony
GT 75DF (DuPont) contains thifensulfuron and will replace
Pinnacle. It is currently
labeled for small grains and fallow and will eventually be labeled for use
in corn and soybean as an inexpensive tank-mix partner.
It has good activity on lambsquarters (including triazine
resistant), pigweed, smartweed, velvetleaf, and chickweed. Pinnacle
25DF (DuPont) can now be applied to 2 to 6 leaf corn (up to 12
inches tall). Pinnacle provides excellent control of lambsquarters and
pigweed (including triazine resistant).
In “Clarity-sensitive areas”, it can be a good alternative. Canopy XL, Harmony Extra, Finesse, Express, Basis, Axiom, Dual and other products will soon be labeled for fall applications in no-till systems. Fall applications of these products target winter annuals and can promote cleaner seedbeds for spring planting of corn or soybean. Refer to the product labels for additional information and restrictions. Hoelon,
Achieve, Maverick, and Finesse
have annual ryegrass
control listed on their labels for use in wheat. PSU research has not fully investigated the effectiveness on
these herbicides on annual ryegrass control and crop safety.
If these products are used be cautious of all use restrictions.
Only wheat can be planted for a period of 1 year following Maverick
application, while only STS soybeans can be planted after 6 months
following a Finesse application. Axiom and Dual may soon have a label for annual ryegrass control in wheat,
as well. Roundup
Ready alfalfa and Clearfield
(IMI) wheat are
still under development. Roundup
Ready alfalfa will allow over-the-top applications of Roundup (glyphosate)
and is still a few years from market.
Clearfield wheat will allow applications of Raptor and will likely
be available within two years. |
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