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Control
Measures for Yellow Starthistle
Alias:
Centaurea solstitialis
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| Mechanical
Control: |
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Small
infestations may be controlled by hand pulling. Remove as much of the root as possible.
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Repeated tillage
that severs the roots below the surface is effective.
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| Cultural
Control: |
- After mechanical
or chemical control, establish desirable vegetation to occupy the
vacant space and to compete with Yellow Starthistle seedlings.
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- Tordon
Rate: 0.25-lbs
active ingredient per acre.
Time: Apply in Spring in rosette through bud
stage.
Remarks: Treatment at suggested rate will not damage
perennial grasses. Use of
surfactant will increase effectiveness.
Caution: Tordon is a restricted use pesticide and must
be applied by or supervised by a certified applicator. Follow label recommendations
and precautions. Do not contaminate
water.
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Tordon & 2, 4-D
Rate: 1
pint Tordon plus one quart 2, 4-D per acre.
Time: Apply during true flowering and repeat
annually.
Remarks: Use of a surfactant will increase effectiveness.
Caution: Apply to non-cropland only. Tordon is a restricted use pesticide. Must be applied by or supervised by a certified
applicator.
Follow label recommendations and precautions. Do not contaminate
water.
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| Rates
for 3-4 Gallon Back Pack Sprayer/Tordon & 2, 4-D: |
- Add 6-8
ounces* of herbicide to 3-4 gallons of water in the sprayer.
Add a couple ounces* of Surfactant, and stir.
NOTE: Be sure always to follow label rates as percent
of active ingredients may vary.
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*NOTE:
8 oz. = ½ pint or 1 cup
1 oz. = 2 tablespoons or 1/8 cup |
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Cooperatively prepared
by the Lander County Conservation District and the Nevada Department
of Agriculture.
08/07
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