| New (Type) | Ingredients | Directions |
Type -
Foliar
User Type -
Novice
Effectiveness -
in season
year after treatment
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Active Ingredient (A.I.):
2,4-D
Common product name:
Many (Aquatic: DMA 4 IVM; 2,4-D Amine 4)
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Rate -
(broadcast) 1 - 2 lb a.e./A
(spot) For a 3.8 lb a.e./gal product. 1 - 2% (0.04 - 0.08 lb a.e./gal)
Timing -
Apply to rosettes in fall or spring or to plants in the bolting stage.
Remarks -
This herbicide offers moderate control when used as the only control method, but can be a useful when paired with other control methods. This herbicide will not provide any residual control of germinating spotted knapweed.
Caution -
Use aquatically labeled product if potential exists for solution to contact surface water. Use of this chemical in areas where soils are permeable, particularly where the water table is shallow, may result in groundwater contamination. Overspray or drift to desirable plants should be avoided, as even minute quantities of the spray may cause severe injury to plants.
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Type -
Foliar
User Type -
Professional
Effectiveness -
in season
year after treatment
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Active Ingredient (A.I.):
aminopyralid
Common product name:
Milestone
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Rate -
(broadcast) 5 - 7 fl oz/A (0.08 - 0.1 lb a.e./A)
(spot) Equivalent to broadcast rates.
Timing -
Applications to rosettes in fall or spring or to plants in the bolting stage are the most effective, but applications can control plants that are in the flower bud stages.
Remarks -
14 fl oz/A can be used as long as less than half of the area is treated. Depending on the volume of solution applied per acre, typical mixtures for spot treatments are 2-8 mL Milestone per gallon of water. This herbicide can provide residual control of germinated spotted knapweed seedlings. Length of residual control is dependent on site specific factors such as amount and timing of precipitation, regrowth of desired plants, and the rate applied.
Caution -
Do not apply directly to water or to areas where surface water is present. Remains in soil for up to one year depending on application rate. Overspray or drift to desirable plants should be avoided, as even minute quantities of the spray may cause severe injury to plants. Do not compost treated plants as herbicide can persist through composting process.
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Type -
Foliar
User Type -
Professional
Effectiveness -
in season
year after treatment
|
Active Ingredient (A.I.):
clopyralid
Common product name:
Transline
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Rate -
(broadcast) 10 - 16 fl oz/A (0.25 - 0.4 lb a.e./A)
(spot) 0.2 - 0.4% (0.005 - 0.01 lb a.e./gal)
Timing -
Applications to rosettes in fall or spring or to plants in the bolting stage are the most effective, but applications can control plants that are in the flower bud stages.
Remarks -
This herbicide can provide residual control of germinated spotted knapweed seedlings. Length of residual control is dependent on site-specific factors such as amount and timing of precipitation, regrowth of desired plants, and the rate applied.
Caution -
Do not apply directly to water or to areas where surface water is present. Use of this chemical in areas where soils are permeable, particularly where the water table is shallow, may result in groundwater contamination. Remains in soil for up to one year depending on application rate. Overspray or drift to desirable plants should be avoided, as even minute quantities of the spray may cause severe injury to plants. Do not compost treated plants as herbicide can persist through composting process.
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Type -
Foliar
User Type -
Professional
Effectiveness -
in season
year after treatment
|
Active Ingredient (A.I.):
dicamba
Common product name:
Banvel; Clarity
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Rate -
(broadcast) 16 - 32 fl oz/A (0.5 - 1 lb a.e./A)
(spot) Equivalent to broadcast rates.
Timing -
Apply to rosettes in fall or spring or to plants in the bolting stage.
Caution -
Do not apply directly to water or to areas where surface water is present. Use of this chemical in areas where soils are permeable, particularly where the water table is shallow, may result in groundwater contamination. Overspray or drift to desirable plants should be avoided, as even minute quantities of the spray may cause severe injury to plants. Rates > 16 fl oz/A (0.5 lb a.e./A) may cause stunting and discoloration of sensitive grasses, such as smooth brome.
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Type -
Foliar
User Type -
Novice
Effectiveness -
in season
year after treatment
|
Active Ingredient (A.I.):
glyphosate
Common product name:
Roundup Pro; many others (Aquatic: Rodeo; AquaNeat)
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Rate -
(broadcast) 0.5 - 1.5 lb a.e./A
(spot) For a 3 lb a.e./gal product. 1 - 2% (0.03 - 0.06 lb a.e./gal)
Timing -
Apply to rosettes in fall or spring or to plants in the bolting stage.
Caution -
Use product labeled for aquatic use if potential exists for solution to contact surface waters. Applications can result in bare ground as glyphosate is not selective. Overspray or drift to desirable plants should be avoided, as even minute quantities of the spray may cause severe injury to plants.
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Type -
Foliar
User Type -
Professional
Effectiveness -
in season
year after treatment
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Active Ingredient (A.I.):
picloram
Common product name:
Tordon K; Trooper 22K
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Rate -
(broadcast) 10 - 32 fl oz/A (0.15 - 0.5 lb a.e./A)
(spot) Equivalent to broadcast rates.
Timing -
Applications to rosettes in fall or spring or to plants in the bolting stage are the most effective, but applications can control plants that are in the flower bud stages.
Remarks -
This herbicide can provide residual control of germinated spotted knapweed seedlings. Length of residual control is dependant on site specific factors such as amount and timing of precipitation, regrowth of desired plants, and the rate applied.
Caution -
Do not apply directly to water or to areas where surface water is present. Use of this chemical in areas where soils are permeable, particularly where the water table is shallow, may result in groundwater contamination. Remains in the soil for over one year depending on application rate and has the potential to contaminate surface runoff water during this timeframe. Maintenance of a vegetative buffer strip is recommended between the areas picloram is applied and surface water features. Overspray or drift to desirable plants should be avoided as even minute quantities of the spray may cause severe injury to plants. Do not compost treated plants as herbicide can persist through composting process.
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Type -
Foliar
User Type -
Professional
Effectiveness -
in season
year after treatment
|
Active Ingredient (A.I.):
aminocyclopyrachlor + chlorsulfuron
Common product name:
Perspective
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Rate -
(broadcast) 4.75 - 5.5 oz/A (aminocyclopyrachlor: 1.9 - 2.15 oz a.i./A + chlorsulfuron: 0.75 - 0.87 oz a.i./A)
(spot) 0.2 - 0.3 oz/gal (aminocyclopyrachlor: 0.08 - 0.12 oz a.i./A + chlorsulfuron: 0.03 - 0.05 oz a.i./A)
Timing -
Apply to rosettes in fall or spring or to plants in the bolting stage.
Caution -
Do not apply directly to water or to areas where surface water is present. Avoid using Perspective in areas where soils are permeable, particularly where the water table is shallow as groundwater contamination may result. Perspective remains in the soil for months depending on application rate and has the potential to contaminate surface runoff water, especially on poorly draining soils or areas with shallow groundwater. Maintenance of a vegetative buffer strip is recommended between the areas Perspective is applied and surface water features. Overspray or drift to desirable plants should be avoided, as even minute quantities of the spray may cause severe injury to plants. Do not compost treated plants as herbicide can persist through composting process.
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Type -
Foliar
User Type -
Professional
Effectiveness -
in season
year after treatment
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Active Ingredient (A.I.):
aminocyclopyrachlor + metsulfuron
Common product name:
Streamline
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Rate -
(broadcast) 4.75 - 5.5 oz/A (aminocyclopyrachlor: 1.9 - 2.15 oz a.i./A + metsulfuron: 0.6 - 0.87 oz a.i./A)
(spot) 0.2 - 0.4 oz/gal (aminocyclopyrachlor: 0.08 - 0.16 oz a.i./gal + metsulfuron: 0.03 - 0.05 oz a.i./gal)
Timing -
Apply to rosettes in fall or spring or to plants in the bolting stage.
Caution -
Do not apply directly to water or to areas where surface water is present. Avoid using Streamline in areas where soils are permeable, particularly where the water table is shallow as groundwater contamination may result. Streamline remains in the soil for months depending on application rate and has the potential to contaminate surface runoff water, especially on poorly draining soils or areas with shallow groundwater. Maintenance of a vegetative buffer strip is recommended between the areas Streamline is applied and surface water features. Overspray or drift to desirable plants should be avoided, as even minute quantities of the spray may cause severe injury to plants. Do not compost treated plants as herbicide can persist through composting process.
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Type -
Foliar
User Type -
Professional
Effectiveness -
in season
year after treatment
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Active Ingredient (A.I.):
dicamba + 2,4-D
Common product name:
Outlaw; Weedmaster
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Rate -
(broadcast) 64 - 96 fl oz/A (dicamba: 0.5 - 0.8 lb a.e./A + 2,4-D: 0.7 - 1.1 lb a.e./A)
(spot) 0.8% (dicamba: 0.009 lb a.e./gal + 2,4-D: 0.011 lb a.e./gal)
Timing -
Apply to rosettes in fall or spring or to plants in the bolting stage.
Caution -
Do not apply directly to water or to areas where surface water is present. Use of this chemical in areas where soils are permeable, particularly where the water table is shallow, may result in groundwater contamination. Overspray or drift to desirable plants should be avoided, as even minute quantities of the spray may cause severe injury to plants. Rates > 16oz/A (0.5 lb a.e./A) may cause stunting and discoloration of sensitive grasses, such as smooth brome.
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Type -
Foliar
User Type -
Professional
Effectiveness -
in season
year after treatment
|
Active Ingredient (A.I.):
dicamba + diflufenzopyr
Common product name:
Overdrive
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Rate -
(broadcast) 6-8 fl oz/A (dicamba: 0.02-0.03 lb a.e./A + diflufenzopyr 0.01 - 0.012 fl oz a.e./A)
(spot) Equivalent to broadcast rates.
Timing -
Apply to rosettes in fall or spring or to plants in the bolting stage.
Caution -
Do not apply directly to water or to areas where surface water is present. Use of this chemical in areas where soils are permeable, particularly where the water table is shallow, may result in groundwater contamination. Overspray or drift to desirable plants should be avoided, as even minute quantities of the spray may cause severe injury to plants. Rates > 16 fl oz/A (0.5 lb a.e./A) may cause stunting and discoloration of sensitive grasses, such as smooth brome.
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Type -
Foliar
User Type -
Professional
Effectiveness -
in season
year after treatment
|
Active Ingredient (A.I.):
imazapyr
Common product name:
Arsenal; Stalker (Aquatic: Habitat; Imazapyr 2sl)
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Rate -
(broadcast) 64 - 96 fl oz/A (1.0 - 1.5 lb a.e./A)
(spot) 0.5 - 1% (0.01 - 0.02 lb a.e./gal)
Timing -
Apply to rosettes in fall or spring or to plants in the bolting stage.
Caution -
Use product labeled for aquatic use if potential exists for solution to contact surface waters. Applications can result in bare ground as imazapyr is not selective and can remain in the soil for several months to over a year depending on application rate. Overspray or drift to desirable plants should be avoided, as even minute quantities of the spray may cause severe injury to plants.
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