Table of Contents

Table 2.5-1. Small-grain herbicides and their characteristics and restrictions.

Trade name5 Common
name		 Manufacturer Family Mode of Action Site of Action Restricted-
use pesticide¹ / Water-quality advisory²		 Worker re-entry³ (hours) Rain-
fast-
ness (hours)
2,4-D 4 lb/gal 2,4-D Several Phenoxy Plant growth regulator Multiple —/— 12–48 1–84
Achieve 40DG / 3.3SC tralkoxydim Syngenta Cyclohexanedione Lipid biosynthesis inhibitor ACCase —/— 12 1
Aim 1.9W / 2EC carfentrazone FMC Triazolinone Cell membrane disrupter (contact) PPO —/— 12 6–8
Axial XL 0.42L pinoxaden Syngenta Phenylpyrazolin Lipid biosynthesis inhibitor ACCase —/— 48 0.5
Bronate 4E (2+2) bromoxynil + MCPA ester Bayer CropScience Nitrile + phenoxy Plant growth regulator D-1 quinone + several —/— 12 —
Buctril 2E bromoxynil Bayer CropScience Nitrile Photosynthesis inhibitor D-1 quinone —/— 12 1
Callisto 4SC mesotrione Syngenta Triketone Pigment inhibitor HPPD —/— 12 1
Clarity 4S / Banvel 4S dicamba BASF/MicroFlo Benzoic acid Plant growth inhibitor Multiple —/— 24 4
Curtail 2.4L clopyralid + 2,4-D Dow AgroSciences Pyridine + phenoxy Plant growth regulator Multiple —/yes 48 6–8
Everest 70WDG flucarbazone Bayer CropScience Sulfonylurea Amino acid biosynthesis ALS synthase —/— 12 1
Finesse 75DF chlorsulfuron + metsulfuron methyl DuPont Sulfonylurea Amino acid biosynthesis inhibitor (protein) ALS synthase —/— 4 —
Finesse Grass and Broadleaf 71.7WG chlorsulfuron + flucarbazone DuPont Sulfonylurea Amino acid biosynthesis inhibitor (protein) ALS synthase —/— 12 1
Gramoxone Inteon 2S paraquat Syngenta Bipyridilium Cell membrane Photosystem I yes/— 12 0.5
Harmony Extra 50DF / TNT Broadleaf 75WDG thifensulfuron + tribenuron DuPont / Gowan Sulfonylurea Amino acid biosynthesis inhibitor (protein) ALS synthase —/— 12 3–6
Harmony SG 50DF / Unity 75WDG thifensulfuron DuPont / Gowan Sulfonylurea Amino acid biosynthesis inhibitor (protein) ALS synthase —/— 4 1
Hoelon 3EC diclofop Bayer CropScience Aryloxyphenoxy-propionates Lipid biosynthesis inhibitor ACCase yes/yes 24 —
Huskie 29.6L pyrasulfotole + bromoxynil Bayer CropScience Pyrazolone + nitrile Cartenoid biosynthesis + photosynthesis inhibitor HPPD + D-1 quinone —/— 12 1
Maverick 75DF sulfosulfuron Monsanto Sulfonylurea Amino acid biosynthesis inhibitor (protein) ALS synthase —/yes 12 —
MCPA 4lb/gal MCPA Several Phenoxy Plant growth regulator Multiple —/— 12–48 —
Olympus Flex 11.25WG (label pending) propoxycarbazone + mesosulfuron Bayer CropScience Sulfonylurea Amino acid biosynthesis inhibitor (protein) ALS synthase —/— 24 —
Orion 2.37L (label pending) floraxulam + MCPA Syngenta Triazolopyrimidine + phenoxy Amino acid biosynthesis inhibitor + PGR ALS + multiple —/— 12 4
Osprey 4.5WDG mesosulfuron Bayer CropScience Sulfonylurea Amino acid biosynthesis inhibitor (protein) ALS synthase —/— 4 4
Peak 57WDG prosulfuron Syngenta Sulfonylurea Amino acid biosynthesis inhibitor (protein) ALS synthase —/— 12 4
PowerFlex 7.5WDG (label pending) pyroxsulam Dow AgroSciences Triazolopyrimidine Amino acid biosynthesis inhibitor ALS —/— 12 4
Prowl H2O 3.8CS pendimethalin BASF Dinitroaniline Seedling growth inhibitor (root) Tublin protein —/— 24 —
Rage D-Tech 6.05EC carfentrazone + 2,4-D ester FMC Triazoline + phenoxy Cell membrane disrupter + PGR PPO + multiple —/— 12 6–8
Roundup 3S / Roundup Weather Max 4.5S / Touchdown Total 4S / Glyphomax XRT 3S / other glyphosates glyphosate Monsanto / Syngenta / Dow Agro / others Amino acid Amino acid biosynthesis derivative EPSP synthase inhibitor (protein) —/— 4–12 1–6
Starane 1.5L fluroxypyr Dow Agro / UAP Pyridine Plant growth regulator Multiple —/— 12 1
Stinger 3S clopyralid Dow AgroSciences Pyridine Plant growth regulator Multiple —/yes 12 6–8
  1. Only licensed applicators may purchase and apply restricted-use pesticides. To become licensed, contact the Pennsylvania Department of Agriculture.
  2. These herbicides have an “Environmental Hazard Warning” on their label and have been detected in water supplies from normal agricultural use. Special precautions apply for their use on coarse-textured soils or where water tables are shallow. See an herbicide label for specific restrictions.
  3. If soil-applied products are injected or incorporated at application time, under certain circumstances the Worker Protection Standard allows workers to enter the treated area if they will have no contact with anything that has been treated. Personal protective equipment is required for early entry to treated areas if contact with treated soil, plants, or water is involved.
  4. See specific product label for more information on rainfastness
  5. Genetic alterations to some of these products are available. See Table 2.2-1b for details.