General Information


FOR USE ON: Conifer Trees, Non-Bearing Food Crops, Non-Crop or Non-Planted Areas and Ornamentals.

Envoy Plus Herbicide is a selective postemergence herbicide for control of annual and perennial grasses. Envoy does not control sedges or broadleaf weeds.

Control Symptoms

Treated grass weeds show a reduction in vigor and growth. Early chlorosis/necrosis of younger plant tissue is followed by a progressive collapse of the remaining foliage. Symptoms will generally be observed in 7 to 14 days after application depending on grass species treated and environmental conditions.


Timing of Applications

Apply Envoy Plus postemergence to actively-growing grasses according to rate table recommendations. Applications made to grass plants stressed by insufficient moisture or cold temperatures, or to grass plants exceeding recommended growth stages may result in unsatisfactory control. Do not apply under these conditions.

In arid regions where irrigation is used to supplement limited rainfall, Envoy Plus should be applied as soon as possible after irrigation (within 7 days). In arid regions, a second application of Envoy Plus will generally provide more effective control of perennial grass weeds than a single application. Make second application to actively-growing grass 2 to 3 weeks after emergence of new growth.

Cultivation of treated grasses 7 days prior to or within 7 days after application of Envoy Plus may reduce weed control.


Use of sufficient spray volumes and pressure is essential to ensure complete coverage. Use a minimum of 5 gals and a maximum of 40 gals of spray solution per acre. Under the following conditions a minimum of 10 gals per acre is required: broadleaf herbicide tank-mixes, perennial grasses, volunteer corn, drought or stress conditions, heavy grass pressure or when grasses are at or near maximum height. Failure to use a minimum of 10 gals per acre under these conditions can result in poor coverage and reduced grass control requiring repeat applications. Spray pressures should reflect a minimum of 30 psi and a maximum of 60 psi at the nozzle. Do not use flood nozzles.


Use a minimum of 3 gals of spray solution per acre unless otherwise directed in the label. Increase spray volumes up to 10 gals as grass or crop foliage becomes dense.


When using hand sprayers or high-volume sprayers utilizing hand guns, mix 1/3% to 2/3% (0.44 oz to 0.85 oz per gal) Envoy Plus and treat to wet vegetation, while not allowing runoff of spray solution. For uses requiring crop-oil concentrate, include crop-oil concentrate at 1% (1.3 oz per gal) by volume. For uses requiring non-ionic surfactant, include non-ionic surfactant at 1/4% (0.33 oz per gal) by volume.

NOTE: If Envoy Plus is applied as a spot treatment, care should be taken to not exceed the maximum rate allowed on a “per acre” basis or crop injury may occur.



- Do not apply if rain is expected within 1 hour of application as control may be unsatisfactory.

- Do not apply a postemergence broadleaf herbicide within one day following application of Envoy Plus or reduced grass control may result.

- Do not apply under conditions of stress. Applying Envoy Plus under conditions that do not promote active grass growth will reduce herbicide effectiveness. These conditions include drought, excessive water, extremes in temperature, low humidity and grasses either partially controlled or stunted from prior pesticide applications. Grasses under these kinds of stressful conditions will not absorb and

translocate Envoy Plus effectively, and will be less susceptible to herbicide activity.

- Application on Long Island, New York, is restricted to no more than 32 fl oz of Envoy Plus Herbicide (0.25 lb ai) per acre per season.

Optimal perennial grass control can be obtained if rhizomes or stolons are cut up by preplant tillage practices (discing, plowing, etc.) to stimulate maximum emergence of grass shoots. Cultural practices, such as continuous no-tillage in which the perennial grass rhizomes or stolons are not cut up, result in a very staggered, non-uniform weed emergence. Due to this non-uniform weed emergence, no fewer than two Envoy Plus applications per season per year are recommended at the appropriate weed-growth stage rate under continuous no-till conditions.

Grass crops such as corn, rice, sorghum, small grains or turf, etc. are highly sensitive to Envoy Plus.

Always read and follow the restrictions and limitations for all products whether used alone or in a tank-mix. The most restrictive labeling of any product used applies in tank-mixtures, including all crop rotational and other crop restrictions.

Tank-mixes of Envoy Plus and broadleaf herbicides may result in reduced grass control. If grass regrowth occurs an additional application of Envoy Plus may be necessary.

Do not apply under conditions involving possible drift to food, forage or other plantings that might be damaged or the crops thereof rendered unfit for sale, use or consumption.


- Use a minimum spray volume of 5 gals/A for aerial applications and 15gals/A for ground applications. Apply only to actively-growing grasses when the first grass reaches the recommended weed height as specified by the Recommendations for Annual and Perennial Grasses section of the label.

- Annual grasses that emerge after the Envoy Plus application will not be controlled, and a second application may be necessary.

- The control of perennial grasses may require more than 1 application in non-tilled areas.

- Do not apply to grasses that have tillered, formed seedheads or exceeded recommended growth stage.

- Do not use flood-jet nozzles.

- Do not apply to drought stressed grasses.

- Do not mow area for 2 weeks prior to or after the Envoy Plus application.

Limitations, Restrictions, and Exceptions

Do not plant any crop for 30 days after application unless clethodim is registered for use in that crop.

For repeat applications, make on a minimum of a 14 day interval.

Restricted Entry Interval

24 hours