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Control
Measures for Russian Knapweed
Alias: Centaurea repens
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| Mechanical
Control: |
- None effective
– deep rooted, pulling is not effective.
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Cultural
Control:
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| Chemical
Control: |
- Tordon
Rate: 1
lb. acid equivalent per acre.
Time: Apply in late spring prior to flower stem
elongation or in fall after first frost.
Remarks: Selective treatment at selective rate will not
damage perennial grasses. Use
of a surfactant will increase effectiveness.
Caution: 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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- Roundup
Rate:
3 lbs. acid equivalent per acre.
Time: Apply when most plants are at bud stage.
Remarks: Roundup also kills grass that might compete with
new seedlings. After treatment,
seed with locally adapted grasses.
Caution: Follow label recommendations and precautions.
Do not contaminate water.
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| Rates
for 3-4 Gallon Back Pack Sprayer/Tordon or Roundup: |
- 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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Cooperatively prepared
by the Lander County Conservation district and the Nevada Department of
Agriculture.
9/00
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