Description of Knawel (Scleranthus annuus):
Knawel is a winter annual which, when it first germinates, may go unnoticed because of its grasslike features. It closely resembles parsley-piert and lawn burrweed. It is a freely branched plant with spreading stems. Leaves, clasping the stem, are opposite, linear, less than 1 mm wide, and sharp-pointed. The very inconspicuous flowers are clustered in the leaf axils. They are small, green, lacking petals, and somewhat spiny to the touch.
CertainLabel™
Knawel Optimized Control Options Finder
Legend:
Control
Suppression
No Control
According to the manufacturer approved labels: The following 16 weed killers, applied at the listed application rates, will control Knawel.
Spot Treatment
per
Label Rate:
0.085 ounces per gallon
Cost Effectiveness:
Makes 118.125 gallons
at a cost of
$1.07 per gallon
at a cost of
$1.07 per gallon
Blanket Treatment
per
Label Rate:
0.085 ounces per 1,000 sqft
Cost Effectiveness:
Covers 118125 square feet
at a cost of
$1.07 per 1,000 sqft
at a cost of
$1.07 per 1,000 sqft
Safe On
Bermudagrass, Buffalograss, Centipedegrass, St. Augustinegrass, and Zoysiagrass
Safe Rate:
Safe Rate:
0.056 - 0.113 ounces per gallon
or
0.056 - 0.113 ounces per 1,000 sqft
CertainLabel™ Calculator for Celsius WG & these grass types
or
0.056 - 0.113 ounces per 1,000 sqft
Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Broadcast Treatment
per
Label Rate:
2.4 lbs per 1,000 sqft
Cost Effectiveness:
Covers 5000 square feet
at a cost of
$7.23 per 1,000 sqft
at a cost of
$7.23 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:
Safe Rate:
2.4 lbs per 1,000 sqft
CertainLabel™ Calculator for BioAdvanced All-in-One Weed & Feed with Microfeed Action & these grass types
Spot Treatment
per
Label Rate:
2.5 fluid ounces per gallon
Cost Effectiveness:
Makes 9.6 gallons
at a cost of
$2.92 per gallon
at a cost of
$2.92 per gallon
Blanket Treatment
per
Label Rate:
4 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 6000 square feet
at a cost of
$4.66 per 1,000 sqft
at a cost of
$4.66 per 1,000 sqft
Safe On
No safe on treatments listed. Please, review the label or contact the merchant for more information.
Spot Treatment
per
Label Rate:
0.75 - 2.4 fluid ounces per gallon
Cost Effectiveness:
Makes 6.667 - 21.333 gallons
at a cost of
$1.20 - $3.84 per gallon
at a cost of
$1.20 - $3.84 per gallon
Blanket Treatment
per
Label Rate:
0.75 - 2.4 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 6667 - 21333 square feet
at a cost of
$1.20 - $3.84 per 1,000 sqft
at a cost of
$1.20 - $3.84 per 1,000 sqft
Safe On
Fine Fescue, Perennial Ryegrass, Red Fescue, and Tall Fescue
Safe Rate:
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
or
1.5 - 2.4 fluid ounces per 1,000 sqft
Bahiagrass, Buffalograss, and Centipedegrass
Safe Rate:
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
or
0.75 - 1.1 fluid ounces per 1,000 sqft
Bermudagrass and Zoysiagrass
Safe Rate:
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
or
0.75 - 1.8 fluid ounces per 1,000 sqft
St. Augustinegrass
Safe Rate:
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
or
0.75 - 1.1 fluid ounces per 1,000 sqft
Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Blanket Treatment
per
Label Rate:
0.09 - 0.28 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 21818 - 65217 square feet
at a cost of
$1.27 - $3.80 per 1,000 sqft
at a cost of
$1.27 - $3.80 per 1,000 sqft
Safe On
Bahiagrass, Bermudagrass, Buffalograss, Carpetgrass, Centipedegrass, Kikuyu Grass, Seashore Paspalum, St. Augustinegrass, and Zoysiagrass
Safe Rate:
Safe Rate:
0.18 - 0.28 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Dismiss & these grass types
Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, and Tall Fescue
Safe Rate:
Safe Rate:
0.09 - 0.18 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Dismiss & these grass types
Bentgrass
Safe Rate:
Safe Rate:
0.09 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Dismiss & Bentgrass
Spot Treatment
per
Label Rate:
1 - 1.25 fluid ounces per gallon
Cost Effectiveness:
Makes 12.8 - 16 gallons
at a cost of
$1.61 - $2.01 per gallon
at a cost of
$1.61 - $2.01 per gallon
Blanket Treatment
per
Label Rate:
1 - 1.25 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 12800 - 16000 square feet
at a cost of
$1.61 - $2.01 per 1,000 sqft
at a cost of
$1.61 - $2.01 per 1,000 sqft
Safe On
Annual Ryegrass, Bahiagrass, Bermudagrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
Safe Rate:
Safe Rate:
1 - 1.25 fluid ounces per gallon
or
1 - 1.25 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Monterey Spurge Power & these grass types
or
1 - 1.25 fluid ounces per 1,000 sqft
Bentgrass
Safe Rate:
Safe Rate:
1 - 1.25 fluid ounces per gallon
or
1 - 1.25 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Monterey Spurge Power & Bentgrass
or
1 - 1.25 fluid ounces per 1,000 sqft
Spot Treatment
per
Label Rate:
6.4 fluid ounces per gallon
Cost Effectiveness:
Makes 5 gallons
at a cost of
$3.59 per gallon
at a cost of
$3.59 per gallon
Blanket Treatment
per
Label Rate:
6.4 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 5000 square feet
at a cost of
$3.59 per 1,000 sqft
at a cost of
$3.59 per 1,000 sqft
Safe On
Bentgrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
Safe Rate:
Safe Rate:
6.4 fluid ounces per gallon
or
6.4 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for BioAdvanced All in One Lawn Weed and Crabgrass Killer & these grass types
or
6.4 fluid ounces per 1,000 sqft
Spot Treatment
per
Label Rate:
6.25 fluid ounces per gallon
Cost Effectiveness:
Makes 5.12 gallons
at a cost of
$4.38 per gallon
at a cost of
$4.38 per gallon
Blanket Treatment
per
Label Rate:
6.4 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 5000 square feet
at a cost of
$4.48 per 1,000 sqft
at a cost of
$4.48 per 1,000 sqft
Safe On
Annual Ryegrass, Bermudagrass, Buffalograss, Chewings Fescue, Fine Fescue, Hard Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
Safe Rate:
Safe Rate:
6.25 fluid ounces per gallon
or
6.4 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Fertilome Weed-Out with Crabgrass Killer & these grass types
or
6.4 fluid ounces per 1,000 sqft
Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Blanket Treatment
per
Label Rate:
0.09 - 0.28 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 21780 - 65340 square feet
at a cost of
$0.81 - $2.42 per 1,000 sqft
at a cost of
$0.81 - $2.42 per 1,000 sqft
Safe On
Bahiagrass, Bermudagrass, Buffalograss, Carpetgrass, Centipedegrass, Kikuyu Grass, Seashore Paspalum, St. Augustinegrass, and Zoysiagrass
Safe Rate:
Safe Rate:
0.18 - 0.28 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Sulfentrazone 4SC Select & these grass types
Bahiagrass, Bermudagrass, Buffalograss, Carpetgrass, Centipedegrass, Kikuyu Grass, Seashore Paspalum, St. Augustinegrass, and Zoysiagrass
Safe Rate:
Safe Rate:
0.18 - 0.28 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Sulfentrazone 4SC Select & these grass types
Chewings Fescue, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, and Tall Fescue
Safe Rate:
Safe Rate:
0.09 - 0.18 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Sulfentrazone 4SC Select & these grass types
Chewings Fescue, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, and Tall Fescue
Safe Rate:
Safe Rate:
0.09 - 0.18 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Sulfentrazone 4SC Select & these grass types
Bentgrass
Safe Rate:
Safe Rate:
0.09 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Sulfentrazone 4SC Select & Bentgrass
Spot Treatment
per
Label Rate:
0.5 - 1 fluid ounces per gallon
Cost Effectiveness:
Makes 320 - 640 gallons
at a cost of
$0.32 - $0.64 per gallon
at a cost of
$0.32 - $0.64 per gallon
Blanket Treatment
per
Label Rate:
1.1 - 1.5 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 213333 - 290909 square feet
at a cost of
$0.71 - $0.96 per 1,000 sqft
at a cost of
$0.71 - $0.96 per 1,000 sqft
Safe On
Bahiagrass, Bermudagrass, Buffalograss, Centipedegrass, Tall Fescue, and Zoysiagrass
Safe Rate:
Safe Rate:
0.5 - 1 fluid ounces per gallon
or
1.1 - 1.5 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Battleship III & these grass types
or
1.1 - 1.5 fluid ounces per 1,000 sqft
Bentgrass, Chewings Fescue, Kentucky Bluegrass, Perennial Ryegrass, and Red Fescue
Safe Rate:
Safe Rate:
0.5 - 1 fluid ounces per gallon
or
1.1 - 1.5 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Battleship III & these grass types
or
1.1 - 1.5 fluid ounces per 1,000 sqft
Spot Treatment
per
Label Rate:
1.1 - 1.5 fluid ounces per gallon
Cost Effectiveness:
Makes 21.333 - 29.091 gallons
at a cost of
$1.72 - $2.34 per gallon
at a cost of
$1.72 - $2.34 per gallon
Blanket Treatment
per
Label Rate:
1.1 - 1.5 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 21333 - 29091 square feet
at a cost of
$1.72 - $2.34 per 1,000 sqft
at a cost of
$1.72 - $2.34 per 1,000 sqft
Safe On
Annual Ryegrass, Bahiagrass, Bermudagrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
Safe Rate:
Safe Rate:
1.1 - 1.5 fluid ounces per gallon
or
1.1 - 1.5 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for 4-Speed XT & these grass types
or
1.1 - 1.5 fluid ounces per 1,000 sqft
Annual Ryegrass, Bahiagrass, Bermudagrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
Safe Rate:
Safe Rate:
1.1 - 1.5 fluid ounces per gallon
or
1.1 - 1.5 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for 4-Speed XT & these grass types
or
1.1 - 1.5 fluid ounces per 1,000 sqft
Bentgrass
Safe Rate:
Safe Rate:
0.67 fluid ounces per gallon
or
0.67 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for 4-Speed XT & Bentgrass
or
0.67 fluid ounces per 1,000 sqft
Spot Treatment
per
Label Rate:
0.73 - 1.28 fluid ounces per gallon
Cost Effectiveness:
Makes 250 - 438.356 gallons
at a cost of
$0.57 - $1.01 per gallon
at a cost of
$0.57 - $1.01 per gallon
Blanket Treatment
per
Label Rate:
0.73 - 1.28 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 250000 - 438356 square feet
at a cost of
$0.57 - $1.01 per 1,000 sqft
at a cost of
$0.57 - $1.01 per 1,000 sqft
Safe On
Chewings Fescue, Fine Fescue, Hard Fescue, Red Fescue, and Tall Fescue
Safe Rate:
Safe Rate:
0.73 - 1.28 fluid ounces per gallon
or
0.73 - 1.28 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Sure Power Selective & these grass types
or
0.73 - 1.28 fluid ounces per 1,000 sqft
Kentucky Bluegrass and Perennial Ryegrass
Safe Rate:
Safe Rate:
0.73 - 1.28 fluid ounces per gallon
or
0.73 - 1.28 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Sure Power Selective & these grass types
or
0.73 - 1.28 fluid ounces per 1,000 sqft
Spot Treatment
per
Label Rate:
0.91 - 1.29 fluid ounces per gallon
Cost Effectiveness:
Makes 24.806 - 35.165 gallons
at a cost of
$1.41 - $1.99 per gallon
at a cost of
$1.41 - $1.99 per gallon
Blanket Treatment
per
Label Rate:
0.91 - 1.29 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 24806 - 35165 square feet
at a cost of
$1.41 - $1.99 per 1,000 sqft
at a cost of
$1.41 - $1.99 per 1,000 sqft
Safe On
Bahiagrass, Bentgrass, Bermudagrass, Chewings Fescue, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Tall Fescue, and Zoysiagrass
Safe Rate:
Safe Rate:
0.91 - 1.29 fluid ounces per gallon
or
0.91 - 1.29 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Cool Power & these grass types
or
0.91 - 1.29 fluid ounces per 1,000 sqft
Centipedegrass and St. Augustinegrass
Safe Rate:
Safe Rate:
116.48 - 165.12 fluid ounces per gallon
or
0.91 - 1.29 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Cool Power & these grass types
or
0.91 - 1.29 fluid ounces per 1,000 sqft
Spot Treatment
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Blanket Treatment
per
Label Rate:
1.1 - 1.47 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 217800 - 290400 square feet
at a cost of
$1.27 - $1.69 per 1,000 sqft
at a cost of
$1.27 - $1.69 per 1,000 sqft
Instructions:
The lower rate is recommended for spring if spring transition is expected within a month. Higher rates may be used if spring transition is at least 4-6 weeks away or has already occurred and also for fall.
Safe On
Bermudagrass, Centipedegrass, St. Augustinegrass, and Zoysiagrass
Safe Rate:
Safe Rate:
1.1 - 1.47 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Coastal & these grass types
Spot Treatment
per
Label Rate:
0.33 - 0.67 fluid ounces per gallon
Cost Effectiveness:
Makes 47.761 - 96.97 gallons
at a cost of
$0.29 - $0.59 per gallon
at a cost of
$0.29 - $0.59 per gallon
Blanket Treatment
per
Label Rate:
0.73 - 1.47 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 21769 - 43836 square feet
at a cost of
$0.64 - $1.28 per 1,000 sqft
at a cost of
$0.64 - $1.28 per 1,000 sqft
Safe On
No safe on treatments listed. Please, review the label or contact the merchant for more information.
Spot Treatment
per
Label Rate:
0.73 - 1.1 fluid ounces per gallon
Cost Effectiveness:
Makes 29.091 - 43.836 gallons
at a cost of
$1.05 - $1.58 per gallon
at a cost of
$1.05 - $1.58 per gallon
Blanket Treatment
per
Label Rate:
0.73 - 1.1 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 29091 - 43836 square feet
at a cost of
$1.05 - $1.58 per 1,000 sqft
at a cost of
$1.05 - $1.58 per 1,000 sqft
Safe On
Annual Ryegrass, Bahiagrass, Bermudagrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
Safe Rate:
Safe Rate:
0.73 - 1.1 fluid ounces per gallon
or
0.73 - 1.1 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Horsepower & these grass types
or
0.73 - 1.1 fluid ounces per 1,000 sqft
Bentgrass
Safe Rate:
Safe Rate:
0.73 - 1.1 fluid ounces per gallon
or
0.73 - 1.1 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Horsepower & Bentgrass
or
0.73 - 1.1 fluid ounces per 1,000 sqft