Trade name(s) Aim, QuickSilver, Shark, Stingray
Manufacturer(s) FMC Corp.
Formulation(s) 1.9 and 2 lb/gal emulsifiable concentrates
Remarks Postemergent, contact herbicide for controlling broadleaf weeds.
Water solubility 12 ppm
Storage conditions Stable under normal storage conditions. Store in tightly closed containers.
Acute toxicity LD50 - 5,140 mg/kg
Action in plant Disrupts cell membranes.
Site of action Group 14: protoporphyrinogen oxidase inhibitor
Chemical family Triazinone
Koc 750 mL/g (25 C) for carfentrazone-ethyl
Tim Prather
Revised December 2009
Controlling undesirable plants on rangeland is an important part of an overall range management program. Undesirable plants use space, moisture, and nutrients that could be put to better use producing forage for grazing animals. Poisonous plants are an additional threat to animal health and productivity.
Andrew Hulting
Revised March 2013
Serious weed management issues in pastures are a symptom of a problem with the crop or site. These problems can include grazing methods, fertilization programs, forage species selection, and irrigation or water management.
Ed Peachey
Revised March 2013
TOMATOES, PEPPERS, AND EGGPLANTS—General Weed Management Strategy
Joel Felix
Revised September 2012
Dry bulb and green onions, leeks, shallots, and spring onions
ONIONS—Site Preparation, Stale Seedbeds, and Selective Postemergence Applications
See “Site Preparation,” “Registered Uses of Glyphosate,” and “Registered Uses of Carfentrazone (Aim) Herbicide in Food Crops” in Section N. Vegetable Crops.
ONIONS—Preplant
bensulide (Prefar 4-E)
Ed Peachey
Revised March 2013
GARLIC—General Weed Management Strategy
Garlic requires nearly perfect weed control because it emerges slowly and matures in 10 to 11 months, and its short vertical leaves never form a canopy. Growers, therefore, often control all weedy vegetation immediately before the crop emerges (often in wet weather), applying a selective soil-applied herbicide for winter weed control and adding treatments in spring, depending on specific weed infestations.
Ed Peachey
Revised March 2013
CORN, SWEET—Preplant Incorporated and Preemergence Surface
acetochlor (Harness 20G, Surpass or Cadence)
Rate 0.8 to 3 lb ai/A. Consult appropriate label for rates.
Time Apply preplant or preemergence.
Ed Peachey
Revised March 2013
SITE PREPARATION
soil fumigants
See the current edition of the PNW Plant Disease Management Handbook for application details and approved materials.
glyphosate (several product names)
Rate Consult labels
Joe DeFrancesco
Revised March 2013
Weed control practices in strawberries must be timed to coincide with the crop’s non-reproductive phases, or when minimal herbicide uptake can be expected. Strawberries can be induced into a non-reproductive “summer dormancy” by withholding water and fertilizer after harvest. Beds can be renovated by mowing old leaves, cultivating row middles, and sometimes by applying a herbicide. In mid-August, plants are fertilized and watered to enhance flower bud development. Soil-applied herbicides can be applied at full rates in the fall.
Ed Peachey
Revised March 2013
BLUEBERRIES, GOOSEBERRIES, CURRANTS, AND ELDERBERRIES—Weed and Vegetation Management
Joe DeFrancesco
Revised March 2013
KIWIFRUIT—Weed and Vegetation Management
