Star Thistle Killer
$53.49
For selective control of broadleaf weeds in rangeland and permanent grass pastures
Use to control susceptible broadleaf weeds on established forage grasses in permanent ranchette grass pastures.
- Best results on most weeds are obtained when weeds are small and actively growing (see specific information below).
- There are no grazing restrictions following this product’s applications when used at labeled rates.
Application Rates: Apply this product at a rate of ¼ fluid ounces per 1000 sq ft. in 2 gallons of water when weeds are young and actively growing.
Advisory: In California, the maximum application rate is 2/3 pint per acre (0.24 fl. oz. per 1000 sq ft.) per annual use season.
Read entire label for specific directions for use.
Additional Information
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Frequently Asked Questions
What is Star Thistle Killer?
It is a very potent herbicide based on the active ingredient Clopyralid. It is the same active ingredient as Dow’s Transline® It is used as a pre and post emergence material.
What can I use Star Thistle Killer on?
It is registered only in California to use on ranchette pastures and non-crop areas. There are no grazing restrictions on the use of this product.
At what rate do I use Star Thistle Killer?
Apply ¼ fluid ounce (1.5 tsp) in 2 gallons of water per 1000 sq. ft. In other words ½ pint bottle will treat 24,000 sq ft. (1/2 of an acre). Assume the bottle cost $45.00. Your cost to treat 1000 sq. ft. of star thistle is about $1.40.
What other weeds does Star Thistle Killer control?
It controls knapweed, canada thistle, musk thistle, and many other broadleaf weeds.
Does it control any weeds that aren’t listed on the label?
Yes. Clover, alfalfa, cocklebur, dandelion, curly dock, groundsel, horseweed, jimsonweed, locoweed, mesquite, kudzu, nightshade, ragweed, sicklepod, sowthistle, sunflower, other thistles, vetch and others.
Does Star Thistle Killer require a permit?
No it can be sold over the counter to homeowners without a permit.
When should I use Star Thistle Killer to control thistles?
The best time is when the plants are in the early rosette to mid bloom. Do not wait until the thistles have fully bloom and hardened. The best time in California is between January and March.
What precautions should I follow?
Avoid drift. Do not use on pastures that contain alfalfa or clovers, as they will be killed. Grasses are tolerant. Do not apply over water. Do not enter the treated area until the spray has dried.
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