Segment II Herbicide

Segment II Herbicide

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Product Overview

Segment II Herbicide is a post-emergent formula that effectively kills troublesome weeds in ornamentals, naturalized areas on golf courses, and residential and commercial landscapes. Its active ingredient Sethoxydim provides superior broad-spectrum control of annual and perennial weeds such as barnyardgrass, crabgrass, Cupgrass, Fescue, foxtail, goosegrass, Johnsongrass, lovegrass, panicum, ryegrass, wild oats, bahiagrass, bermudagrass, bentgrass, and more. The active ingredient quickly penetrates plant tissues and rapidly provide systemic activity so that it can start working immediately. It features a flexible formulation so you can combine it with other compatible herbicides and adjuvants for more extensive treatment. It rainfast within an hour so the effectiveness will not be reduced in case of rain. Available in a 2.5-gallon jug.

Features and Specs

Active Ingredient Sethoxydim 18.0%
Target pests Barnyardgrass, Broadleaf signalgrass, Crabgrass, Cupgrass, Fescue, Foxtail, Goosegrass, Johnsongrass, Junglerice, Lovegrass, Orchardgrass, Panicum, Ryegrass, Wild oats, Witchgrass, Bahiagrass, Bentgrass, Bermudagrass, Johnsongrass
For use in Ornamentals, turfgrass, and professional vegetation management
Application Applications (aerial, broadcast, band or spot spray) can be made to actively growing grass weeds
Maximum rate per application:
Grasses up to 6 in. height - 1.5 pints per acr
Grasses up to 12 in. height - 2.5 pints per acre
Pet safe Yes, if used as directed on Label
Formulation Professional Product
Group 1 Herbicide
VT (Restricted To Licensed Applicators Only)
Special Features Rainfast within an hour
Flexible formulation and tank mixes easily
Shipping Weight 24.00 lbs
Manufacturer BASF (Mfg. Number: 59014427)
EPA Registration 7969-398



Annual Grassy Weeds:

Barnyardgrass, Broadleaf signalgrass, Brome (downy), Crabgrass (large), Crabgrass (smooth), Cupgrass (wooly), Fescue (tall, seedling), Foxtail (giant), Foxtail (green), Foxtail (yellow), Goosegrass, Johnsongrass (seedling), Junglerice, Lovegrass, Orchardgrass (seedling), Panicum (browntop), Panicum (fall), Panicum (Texas), Ryegrass (annual), Sandbur (field), Shattercane/Wildcane, Sprangletop (red), Stiltgrass (Japanese), Volunteer barley, Volunteer oats, Volunteer rye, Volunteer wheat, Wild oats, Wild proso millet, Witchgrass.

Perennial Grassy Weeds:

Bahiagrass, Bentgrass, Bermudagrass, Johnsongrass (rhizome), Quackgrass, Velvetgrass (creeping), Velvetgrass (German), Wirestem muhly.



Christmas tree and conifer nurseries and plantations, Commercial and residential landscapes, Container and field-grown nursery production, Drug and medicinal crops, Industrial landscapes, Perennial peanuts (non-food), Potting soil and topsoil, Forestry, reforestation and tree nurseries and plantations


Naturalized areas on golf courses and Residential and commercial landscapes

Professional Vegetation Management:

Airports, Electrical transformer stations, Exteriors of public buildings, Industrial areas, Nonagricultural fencerows and hedgerows, Paved areas, Pipeline pumping stations, Recreation areas, Rights-of-way, Seedhead and growth suppression on roadsides, Sewage disposal areas, Storage yards, Timberland sites, Wildflowers in naturalized areas.


Restrictions and Limitations:

  • DO NOT use treated vegetation as pasture, hay, feed or forage.
  • Avoid direct or indirect contact with any desired grass crop unless otherwise recommended on the Segment II label.
  • DO NOT apply Segment II with another pesticide where one component of the tank mix is incompatible with additives, surfactants or oil adjuvants.
  • DO NOT use recirculating sprayers to apply Segment II.
  • DO NOT apply to grasses or ornamental crops under stress such as stress due to lack of moisture, hail damage, flooding, herbicide injury, mechanical injury, or widely fluctuating temperatures, as unsatisfactory control and injury may result.
  • DO NOT apply through any type of irrigation equipment.
  • Avoid using Segment II with adjuvants at temperatures above 90degrees Fahrenheit and relative humidity is at or above 60%, or any time the temperature exceeds 100 degrees Fahrenheit, as injury may result.
  • Only use Segment II on centipedegrass and fine fescue. Application to other turfgrass species will result in unacceptable injury or plant death.

Mode of Action:

Sethoxydim, the active ingredient in Segment II, is a graminicide which inhibits the enzyme acetyl CoA carboxylase (ACCase), resulting in cessation of fatty acid synthesis which is essential for new growth. Segment II rapidly enters the targeted grass weed through the foliage and translocates throughout the plant. Whole plant death occurs over approximately 3 weeks. Sethoxydim is classified in Group 1 by the Weed Science Society of America (WSSA) and Group A by the Herbicide Resistance Action Committee (HRAC).

Resistance Management:

Weed resistance to ACCase-inhibiting herbicides (Group 1), is known to occur, and populations of resistant biotypes are known to exist. Resistance management practices include:

  • Following labeled application rate and weed growth stage recommendations
  • Avoiding multiple repeat applications of herbicides with the same mode of action
  • Using tank mixes and sequential application with other effective herbicides possessing different modes of action

Application Instructions:

Applications (aerial, broadcast, band or spot spray) can be made to actively growing grass weeds at the rates and growth stages listed in the label unless instructed differently in Crop-specific Information. The most effective control will result from making postemergence applications of Segment II early, when grass weeds are small. Delaying application permits weeds to exceed the maximum size stated and will prevent complete control.

DO NOT apply when conditions favor drift from the target area or wind speed is greater than 10 mph.

Ground Application (Broadcast):

Apply with properly calibrated ground equipment in sufficient water per acre to provide uniform spray distribution (between 5 to 50 gallons spray solution per acre or 1 to 10 pints per 1,000 square feet). Apply Segment II using 30 to 60 psi. If weed or crop foliage is dense, use a minimum of 20 gallons of water and 60 psi.

Spot or Small Area Application:

Segment II can be applied using tank-type sprayers, backpack sprayers, high-volume equipment with handguns, or other suitable nozzle arrangements. Prepare a solution of
Segment II in water according to Table 3 or Table 4 on the label.

DO NOT make spot treatments in addition to broadcast treatment.

Mixing Instructions for Backpack and Pump-up Type Sprayers:

  • Fill a clean spray tank 1/2 full with clean water
  • Add required amount of Segment II
  • Cap sprayer and agitate to ensure adequate mixing
  • Uncap sprayer and add appropriate amount of adjuvant (COC or MSO) or additive
  • Cap sprayer and agitate again to ensure adequate mixing
  • Finish filling tank to the desired level

Apply spray mixture directly on sporadically occurring susceptible weeds. For best results apply on a spray-to-wet basis. Follow up applications may be made if necessary.

Environmental Hazards:

This is toxic to aquatic organisms. For terrestrial uses, DO NOT apply directly to water, or to areas where surface water is present, or to intertidal areas below the mean high water mark. DO NOT contaminate water when disposing of equipment washwater or rinsate.

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