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Knotweed Weed Killer

Polygonum spp. Herbicide

Description of Knotweed (Polygonum spp.):
Knotweed, including Japanese and Bohemian knotweed, is shrub-like plant that grows 3 to 9 feet tall and spreads via rhizomes that can reach up to 15 feet away from the mother plant. It also reproduces by seed. It's prevalent in moist and partially shaded habitats.
According to the manufacturer approved labels: The following 12 weed killers, applied at the listed application rates, will control Knotweed.
Pre-Emergent
Post-Emergent
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Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Broadcast Treatment
Label Rate:
2.86 lbs per 1,000 sqft
Cost Effectiveness:
Covers 5000 square feet
at a cost of
$4.80 per 1,000 sqft
Safe On
Annual Ryegrass, Bahiagrass, Bermudagrass, Buffalograss, Centipedegrass, Chewings Fescue, Fine Fescue, Hard Fescue, Kentucky Bluegrass, Kikuyu Grass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
Safe Rate:
2.86 lbs per 1,000 sqft
CertainLabel™ Calculator for Scotts Turf Builder Weed and Feed & these grass types
Pre-Emergent
Post-Emergent
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Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Broadcast Treatment
Label Rate:
5 lbs per 1,000 sqft
Cost Effectiveness:
Covers 4000 square feet
at a cost of
$6.87 per 1,000 sqft
Safe On
Bahiagrass, Bermudagrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, and Tall Fescue
Safe Rate:
5 lbs per 1,000 sqft
CertainLabel™ Calculator for Scotts Turf Builder Triple Action & these grass types
Pre-Emergent
Post-Emergent
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Spot Treatment
Label Rate:
0.75 - 1.8 fluid ounces per gallon
Cost Effectiveness:
Makes 11.111 - 26.667 gallons
at a cost of
$1.21 - $2.91 per gallon
Blanket Treatment
Label Rate:
0.73 - 1.84 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 10890 - 27225 square feet
at a cost of
$1.19 - $2.97 per 1,000 sqft
Safe On
Annual Bluegrass, Annual Ryegrass, Bentgrass, Colonial Bentgrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, and Tall Fescue
Safe Rate:
1.1 - 1.8 fluid ounces per gallon
or
1.1 - 1.84 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for SpeedZone & these grass types
Bermudagrass, Buffalograss, and Zoysiagrass
Safe Rate:
0.75 - 1.5 fluid ounces per gallon
or
0.73 - 1.47 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for SpeedZone & these grass types
Pre-Emergent
Post-Emergent
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Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Broadcast Treatment
Label Rate:
2.86 lbs per 1,000 sqft
Cost Effectiveness:
Covers 5000 square feet
at a cost of
$4.37 per 1,000 sqft
Safe On
Annual Ryegrass, Bahiagrass, Bermudagrass, Buffalograss, Centipedegrass, Chewings Fescue, Fine Fescue, Hard Fescue, Kentucky Bluegrass, Kikuyu Grass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
Safe Rate:
2.86 lbs per 1,000 sqft
CertainLabel™ Calculator for Scotts Turf Builder WinterGuard Fall Weed and Feed & these grass types
Pre-Emergent
Post-Emergent
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Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Blanket Treatment
per
Label Rate:
0.185 - 0.83 ounces per 1,000 sqft
Cost Effectiveness:
Covers 96386 - 432432 square feet
at a cost of
$0.15 - $0.70 per 1,000 sqft
Instructions:
To control these weeds, apply Prodiamine 65WDG in late summer, fall, or winter before weed seeds germinate.
Refer to the green safe rates table for the correct rate for your turf-type.
Safe On
Bahiagrass, Bermudagrass, Centipedegrass, Kikuyu Grass, Seashore Paspalum, St. Augustinegrass, Tall Fescue, and Zoysiagrass
Safe Rate:
0.36 - 0.83 ounces per 1,000 sqft
CertainLabel™ Calculator for Prodiamine 65 WDG & these grass types
Buffalograss, Kentucky Bluegrass, and Perennial Ryegrass
Safe Rate:
0.185 - 0.55 ounces per 1,000 sqft
CertainLabel™ Calculator for Prodiamine 65 WDG & these grass types
Bentgrass
Safe Rate:
0.185 - 0.37 ounces per 1,000 sqft
CertainLabel™ Calculator for Prodiamine 65 WDG & Bentgrass
Fine Fescue
Safe Rate:
0.185 - 0.42 ounces per 1,000 sqft
CertainLabel™ Calculator for Prodiamine 65 WDG & Fine Fescue
Pre-Emergent
Post-Emergent
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Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Broadcast Treatment
Label Rate:
3.1 - 7.2 lbs per 1,000 sqft
Cost Effectiveness:
Covers 2500 - 5806 square feet
at a cost of
$5.15 - $11.95 per 1,000 sqft
Safe On
Bahiagrass, Bermudagrass, Centipedegrass, Kikuyu Grass, Seashore Paspalum, St. Augustinegrass, Tall Fescue, and Zoysiagrass
Safe Rate:
1.8 - 7.2 lbs per 1,000 sqft
CertainLabel™ Calculator for Pro Turf Barricade & these grass types
Buffalograss, Kentucky Bluegrass, and Perennial Ryegrass
Safe Rate:
1.8 - 4.8 lbs per 1,000 sqft
CertainLabel™ Calculator for Pro Turf Barricade & these grass types
Fine Fescue and Red Fescue
Safe Rate:
1.8 - 3.6 lbs per 1,000 sqft
CertainLabel™ Calculator for Pro Turf Barricade & these grass types
Bentgrass
Safe Rate:
1.8 - 2.4 lbs per 1,000 sqft
CertainLabel™ Calculator for Pro Turf Barricade & Bentgrass
Pre-Emergent
Post-Emergent
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Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Blanket Treatment
Label Rate:
5.33 - 8 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 4000 - 6004 square feet
at a cost of
$3.08 - $4.62 per 1,000 sqft
Safe On
Annual Ryegrass, Chewings Fescue, Fine Fescue, Hard Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, and Tall Fescue
Safe Rate:
8 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Scotts Liquid Turf Builder Weed & Feed & these grass types
Bahiagrass, Bermudagrass, Carpetgrass, Centipedegrass, Kikuyu Grass, and Zoysiagrass
Safe Rate:
5.33 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Scotts Liquid Turf Builder Weed & Feed & these grass types
Pre-Emergent
Post-Emergent
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Spot Treatment
Label Rate:
0.75 - 2.4 fluid ounces per gallon
Cost Effectiveness:
Makes 6.667 - 21.333 gallons
at a cost of
$1.23 - $3.94 per gallon
Blanket Treatment
Label Rate:
0.75 - 2.4 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 6667 - 21333 square feet
at a cost of
$1.23 - $3.94 per 1,000 sqft
Safe On
Fine Fescue, Perennial Ryegrass, Red Fescue, and Tall Fescue
Safe Rate:
1.5 - 2.4 fluid ounces per gallon
or
1.5 - 2.4 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Bonide Weed Beater Ultra Concentrate & these grass types
Bahiagrass, Buffalograss, and Centipedegrass
Safe Rate:
0.75 - 1.8 fluid ounces per gallon
or
0.75 - 1.1 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Bonide Weed Beater Ultra Concentrate & these grass types
Bermudagrass and Zoysiagrass
Safe Rate:
0.75 - 1.8 fluid ounces per gallon
or
0.75 - 1.8 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Bonide Weed Beater Ultra Concentrate & these grass types
St. Augustinegrass
Safe Rate:
0.75 - 1.8 fluid ounces per gallon
or
0.75 - 1.1 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Bonide Weed Beater Ultra Concentrate & St. Augustinegrass
Pre-Emergent
Post-Emergent
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Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Broadcast Treatment
Label Rate:
2.4 lbs per 1,000 sqft
Cost Effectiveness:
Covers 5000 square feet
at a cost of
$4.94 per 1,000 sqft
Safe On
Annual Ryegrass, Bermudagrass, Buffalograss, Chewings Fescue, Fine Fescue, Hard Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Seashore Paspalum, Tall Fescue, and Zoysiagrass
Safe Rate:
2.4 lbs per 1,000 sqft
CertainLabel™ Calculator for BioAdvanced All-in-One Weed & Feed with Microfeed Action & these grass types
Pre-Emergent
Post-Emergent
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Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Blanket Treatment
Label Rate:
0.16 - 0.32 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 99566 - 199131 square feet
at a cost of
$0.49 - $0.98 per 1,000 sqft
Safe On
No safe on treatments listed. Please, review the label or contact the merchant for more information.
Pre-Emergent
Post-Emergent
| More Info | View Label
Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Blanket Treatment
Label Rate:
1.1 - 1.5 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 213333 - 290909 square feet
at a cost of
$0.42 - $0.58 per 1,000 sqft
Safe On
Bahiagrass, Bermudagrass, Chewings Fescue, Fine Fescue, Hard Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
Safe Rate:
1.1 - 1.5 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Triplet SF & these grass types
Pre-Emergent
Post-Emergent
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Spot Treatment
of
Label Rate:
0.5 - 1% mixture
Cost Effectiveness:
Makes 100 - 200 gallons
at a cost of
$0.25 - $0.51 per gallon
Blanket Treatment
Label Rate:
0.73 - 1.1 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 116160 - 174240 square feet
at a cost of
$0.29 - $0.44 per 1,000 sqft
Safe On
No safe on treatments listed. Please, review the label or contact the merchant for more information.