March 30, 2007

Crop protection chemical companies announced the release of two new active ingredients for the 2007 growing season. However, new herbicide offerings continue to be dominated by generics and new or revised active ingredient combinations. Several companies have signed licensing agreements to share compounds and target more specific markets. Following is a list of new herbicides. Please contact me if I have inadvertently omitted a new product, and I'll prepare a followup article for CropWatch.

Herbicides with New Active Ingredients

Axial (pinoxaden). Registered for postemergence annual grass control in wheat and barley. Mode of action is lipid synthesis inhibition (like Select, Poast Plus, Assure, etc). An adjuvant called Adigor has been developed specifically for use with Axial. Marketed by Syngenta.

Huskie (pyrasulfotole). Registered for postemergence broadleaf weed control in wheat and barley. Mode of action is HPPD-inhibitor (like Callisto, Impact). Contains a safener. Marketed by Bayer CropSciences.

New Herbicide Formulations

Autumn (iodosulfuron). Registered for fall burndown application prior to planting corn. Controls many broadleaf weeds. Mode of action is ALS-inhibitor. Contains a safener. Iodosulfuron is also an active ingredient in Equip. Marketed by Bayer CropSciences.

Eradicane (EPTC). Registered for preplant incorporated application prior to corn. Controls many grasses and some broadleaf weeds. Mode of action is seedling growth inhibitor. Contains a safener. This is comparable to the "Eradicane" product marketed years ago. It is now being marketed by Gowan.

Remedy Ultra (triclopyr ester). Registered for control of woody plants and broadleaf weeds in rangeland, permanent grass pasture, and CRP. Mode of action is growth regulator. Triclopyr is also an active ingredient in Remedy, Redeem and Garlon. Marketed by Dow AgroSciences.

Silverado (mesosulfuron-methyl). Registered for postemergence wild oat control in wheat. Mode of action is ALS-inhibitor. Mesosulfuron is also an active ingredient in Osprey and Olympus FLEX. Marketed by Bayer CropSciences 

New or Revised Combination Herbicides 

Authority First (sulfentrazone, 62.1% + cloransulum-methyl, 7.9%). A combination of the active ingredients found in Authority and First Rate. Registered for preemergence and preplant in soybeans. Controls many broadleaf weeds and suppresses some grasses. Modes of action are PPO-inhibitor and ALS-inhibitor. Marketed by FMC.

CleanWave (aminopyralid [0.085 lb/gal] + fluroxypyr [1.2 lb/gal]). A combination of the active ingredients found in Milestone and Starane. Registered for postemergence broadleaf weed control in wheat. Mode of action of both active ingredients is growth regulators. Marketed by Dow AgroSciences.

ClearMax (imazamox [1.0 lb/gal] + MCPA ester [3.7 lb/gal]). A combination of the active ingredients found in Raptor and MCPA. Registered for postemergence broadleaf weed control in ClearField wheat. Modes of action are ALS-inhibitor and growth regulator. Marketed by BASF.

ForeFront (2,4-D ammonium salt [2.67 lb/gal] + aminopyralid [0.33 lb/gal]). A combination of active ingredients from 2,4-D and Milestone. Registered for postemergence broadleaf weed control in permanent grass pasture and CRP. Mode of action of both active ingredients is growth regulator. Marketed by Dow AgroSciences.

Imperium (EPTC [5.6 lb/gal] + acetochlor [1.4 lb/gal]). A combination of active ingredients found in Eradicane and Surpass. Registered for preplant incorporated application prior to corn. Mode of action of both ingredients is seedling growth inhibitor. Contains a safener. Marketed by Gowan.

PreFix (S-metolachlor + fomesafen). A co-pack of Dual II Magnum and Reflex. Registered for preemergence weed control in soybeans. Modes of action are seedling growth inhibitor and PPO inhibitor. Marketed by Syngenta.

Sonic (sulfentrazone, 62.1% + cloransulum-methyl, 7.9%). A combination of the active ingredients found in Authority and First Rate. Registered for preemergence and preplant in soybeans. Controls many broadleaf weeds and suppresses some grasses. Modes of action are PPO-inhibitor and ALS-inhibitor. Marketed by Dow AgroSciences.

Starane NXT (fluroxypyr ester [0.583 lb/gal] + bromoxynil [2.33 lb/gal]). A combination of active ingredients found in Starane and Buctril. Registered for postemergence broadleaf weed control in wheat, oats, and barley. Modes of action are growth regulator and photosynthesis inhibitor. Marketed by Dow AgroSciences.

Status (dicamba, 44.0% + diflufenzopyr, 17.1%). Registered for postemergence control of broadleaf weeds in corn. BASF added a safener (isoxadifen-ethyl) to the active ingredients found in Distinct. The safener has been shown to reduce the risk of lodging or green snap in corn after Stutus application. Mode of action of both herbicides is growth regulator. Marketed by BASF.

New Generic Herbicides (Non-Glyphosate)

BreakFree (acetochlor). Registered for preplant and preemergence use in corn. Controls many annual grasses and small-seeded broadleaf weeds. Mode of action is seedling growth inhibitor. Contains the safener dichlormid. Comparable to TopNotch. Marketed by DuPont.

BreakFree ATZ (acetochlor [3 lb/gal] + atrazine [2.25 lb/gal]). Registered for preplant and preemergence use in corn. Controls many annual grasses and broadleaf weeds. Modes of action are seedling growth inhibitor and photosynthesis inhibitor. Contains the safener dichlormid. Comparable to Keystone. Marketed by DuPont.

BreakFree ATZ Lite (acetochlor [4 lb/gal] + atrazine [1.5 lb/gal]). Registered for preplant and preemergence use in corn. Controls many annual grasses and broadleaf weeds. Modes of action are seedling growth inhibitor and photosynthesis inhibitor. Contains the safener dichlormid. Comparable to Keystone LA. Marketed by DuPont.

Propel (dimethenamid-P). Registered for use in corn, grain sorghum, soybean, dry bean, sugarbeet, and potato. Controls many annual grasses and some broadleaf weeds. Mode of action is seedling growth inhibitor. Comparable to Outlook. Marketed by Rosen's.

Propel ATZ (dimethenamid-P [1.7 lb/gal] + atrazine [3.3 lb/gal]). Registered for use in corn or grain sorghum. Controls many annual grasses and broadleaf weeds. Modes of action are seedling growth inhibitor and photosynthesis inhibitor. Comparable to Guardsman Max. Marketed by Rosen's.

Propel ATZ Lite (dimethenamid-P [2.25 lb/gal] + atrazine [2.75 lb/gal]). Registered for use in corn or grain sorghum. Controls many annual grasses and broadleaf weeds. Modes of action are seedling growth inhibitor and photosynthesis inhibitor. Comparable to Guardsman Max Lite. Marketed by Rosen's.

Mark Bernards
Extension Weeds Specialist — Irrigated Production