ISSUE 6   June 8, 2006


Last week in the Herbicide Update section, the application of Pursuit Plus was incorrectly listed as PRE in dry bean, dry pea, chickpea, and lentil. Pursuit Plus is labeled only as PPI in labeled crops.



EPA granted federal registration of reflex on dry bean on June 1, 2006. However, labeling from Syngenta is still required and the labeling must be approved by the ND Dept of Ag before Reflex can be legally used in dry bean. It is expected that Syngenta will quickly develop and distribute a one-to two page supplemental label. The label should also be available on on CDMS. This is a major advancement for Reflex because states will not be required to go through the Section 18 process to get approved use.




- Assure II = sunflower registration pending.

- Harmony GT = Use on RR/STS soybean at the full 0.3 oz/A rate. RR/STS soybean has a niche in ND because Harmony GT controls wild buckwheat and common lambsquarters which can escape glyphosate treatments. RR/STS soybean technology may be useful after application of a very long residual SU use in wheat. Harmony GT at 0.33 oz/A provides excellent wild buckwheat, common lambsquarters, redroot pigweed, smartweed, and pre-bolting mustards/volunteer canola control.

- Affinity Tankmix (thifensulfuron + tribenuron 40+10% SG) = called Affinity, niche is use in the Red River Valley to replace Harmony GT/ Extra in small grains. Use this formulation when tank-mixing with POST-grass herbicides in wheat. Formulated as an SG (soluble granule) Total Sol to reduce sprayer contamination and increase activity.

- Affinity BroadSpec = (thifensulfuron + tribenuron 25+25% SG) called BroadSpec, niche is use in small grains in Central and Western ND, to replace Express in small grains, has a lower cost than Affinity, and has the same Total Sol formulation as Affinity Tankmix. Not intended for use with POST grass herbicides because the increased antagonism from the higher tribenuron rate.

- Accent Gold and Basis Gold = discontinued.

- Basis (rimsulfuron + thifensulfuron) = niche is fall applied in corn.

- Steadfast (nicosulfuron + rimsulfuron) = niche is POST with residual weed control in a planned POST program in corn.

- Stout (nicosulfuron + thifensulfuron) = New for 2006. Accent + Harmony GT, niche would be as a POST application following a PRE herbicide in corn.

- Accent (nicosulfuron) = niche is a POST rescue treatment.

- Resolve = (rimsulfuron), niche is PRE or Early POST prior to or with glyphosate in RR corn. Can be used on conventional corn. 1 oz = $6.50. NDSU has very little data on Resolve as a PRE treatment compared to acetochlor, Outlook, or Dual.

- Express = niche is use in Express resistant snfl.

- Cimarron Xtra (metsulfuron + chlorsulfuron at 1:1 ratio). Use for total vegetation control at 0.5 to 2 oz/A in noncropland.

Earlier this year DuPont and Syngenta formed a 50/50 joint venture to facilitate the outlicensing of seed genetics and biotech traits. The two companies also agree to cross-license certain corn and soybean traits that each company will market independently under their own seed brands. The agreement includes rights for Syngenta to market the new Optimum GAT herbicide tolerant trait developed by DuPont. The joint venture, GreenLeaf Genetics LLC, will offer corn and soybean breeding material from both DuPont and Syngenta. Through the cross-license agreements:

• Syngenta receives a global license to the Optimum™ GAT™ trait, a DuPont proprietary glyphosate and ALS chemistry tolerant trait for both soybeans and corn to be marketed in conjunction with its Agrisure™ brand of traits.

• DuPont receives a global license to Syngenta’s insect resistance technology for European corn borer, corn rootworm and broad lepidopteran control as it develops the next generation of insect traits.


- Express Resistant Sunflower = working with Dupont the seed should be registered and available by 2008. In addition to a wide range of broadleaf weed control, it will also control Canada thistle.

Will introduce in 2009 the Optimum GAT gene starting with corn and soybean, then other crops. This gene will confer both glyphosate and ALS resistance. This is the first metabolism based resistance to glyphosate where the glyphosate molecule will be metabolized through an enzyme glyphosate N-acetyltransferase (GAT). The gene, found in a bacteria, was magnified 30,000 times through gene shuffling.


- Aim (carfentrazone) = labeled for preharvest use in dry beans and other crops.

- Spartan 4F (sulfentrazone) = higher cost than the DF formulation. The new 4F label does not include potato and dry bean. ND Section 18 for flax has been approved.


- Owns the right to market and distribute Far-Go, Buckle, Eradicane, and other generic herbicides. Far-Go/Buckle could be applied in wild oat patches via GPS for wild oat resistance management.


- KIH 485 = Experimental corn herbicide. Registration anticipated in 2010. It is compared to the acetanilide chemistry of Harness, Surpass, Lasso, Dual, Outlook, and Define by controlling many annual grasses like foxtail. An edge it has over its competition is much lower use rates (10 times lower), different mode of action for weed resistance management, greater broadleaf weed control (redroot pigweed, common lambsquarters, wild buckwheat, kochia, wild mustard, nightshades, marshelder, and many others. and has season-long residual activity. There is potential for use on soybean and other crops.


- ET (pyraflufen) = similar to Aim in use rate, mode of action, and selectivity. Low cost may cause some grower interest. Helena and Nufarm may be the only distributors in ND. May see ET + 2,4-D/glyphosate/ and other premixes in the future.

Richard Zollinger
NDSU Extension Weed Specialist

NDSU Crop and Pest Report Home buttonTop of Page buttonTable of Contents buttonPrevious buttonNext button