Jump to Top

Cornflower Weed Killer

Centaurea cyanus Herbicide

Description of Cornflower (Centaurea cyanus):
Cornflower, aka "bachelor's button," is well known for its color which is described as "cornflower blue." It belongs to the daisy family and can grow from between 1 to 3 feet in height. The leaves are grayish-green and the flowers blue. It blooms from June to September.
According to the manufacturer approved labels: The following 10 weed killers, applied at the listed application rates, will control Cornflower.
Pre-Emergent
Post-Emergent
| More Info | View Label
Spot Treatment
Label Rate:
1 - 1.5 fluid ounces per gallon
Cost Effectiveness:
Makes 21.333 - 32 gallons
at a cost of
$0.53 - $0.79 per gallon
Blanket Treatment
Label Rate:
1.1 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 29040 square feet
at a cost of
$0.58 per 1,000 sqft
Safe On
Annual Ryegrass, Bahiagrass, Bentgrass, Bermudagrass, Buffalograss, Carpetgrass, Centipedegrass, Chewings Fescue, Fine Fescue, Hard Fescue, Kentucky Bluegrass, Kikuyu Grass, Perennial Ryegrass, Red Fescue, St. Augustinegrass, Tall Fescue, and Zoysiagrass
Safe Rate:
1 - 1.5 fluid ounces per gallon
or
1.1 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for 2,4-d Amine & these grass types
Greenworks G-MAX 40V 16'' Cordless Lawn Mower with 4Ah Battery - 25322 mode...
2,819
$
267.88
$299.00
Save 10%
Pre-Emergent
Post-Emergent
| More Info | View Label
Spot Treatment
Label Rate:
1 - 1.25 fluid ounces per gallon
Cost Effectiveness:
Makes 12.8 - 16 gallons
at a cost of
$1.57 - $1.96 per gallon
Blanket Treatment
Label Rate:
1 - 1.25 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 12800 - 16000 square feet
at a cost of
$1.57 - $1.96 per 1,000 sqft
Safe On
Annual Ryegrass, Bahiagrass, Bermudagrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
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
Bentgrass
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
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:
0.37 - 1.47 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 217800 - 871200 square feet
at a cost of
$0.00 per 1,000 sqft
Safe On
Bahiagrass, Bentgrass, Bermudagrass, Buffalograss, Chewings Fescue, Fine Fescue, Hard Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, St. Augustinegrass, Tall Fescue, and Zoysiagrass
Safe Rate:
0.37 - 1.47 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for 2,4-D Amine 4 & these grass types
Pre-Emergent
Post-Emergent
| More Info | View Label
Spot Treatment
Label Rate:
0.18 fluid ounces per gallon
Cost Effectiveness:
Makes 175.251 gallons
at a cost of
$1.02 per gallon
Blanket Treatment
Label Rate:
0.18 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 175251 square feet
at a cost of
$1.02 per 1,000 sqft
Safe On
Bahiagrass, Bentgrass, Bermudagrass, Buffalograss, Centipedegrass, Chewings Fescue, Kentucky Bluegrass, Kikuyu Grass, Perennial Ryegrass, Red Fescue, Seashore Paspalum, St. Augustinegrass, Tall Fescue, and Zoysiagrass
Safe Rate:
0.09 - 0.51 fluid ounces per gallon
or
0.09 - 0.51 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Lontrel & these grass types
Pre-Emergent
Post-Emergent
| More Info | View Label
Spot Treatment
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
Blanket Treatment
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
Safe On
Annual Ryegrass, Bahiagrass, Bermudagrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
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
Annual Ryegrass, Bahiagrass, Bermudagrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
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
Bentgrass
Safe Rate:
0.67 fluid ounces per gallon
or
0.67 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for 4-Speed XT & Bentgrass
Pre-Emergent
Post-Emergent
| More Info | View Label
Spot Treatment
Label Rate:
1.33 fluid ounces per gallon
Cost Effectiveness:
Makes 24.06 gallons
at a cost of
$0.81 per gallon
Blanket Treatment
Label Rate:
0.73 - 1.16 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 27657 - 43560 square feet
at a cost of
$0.45 - $0.70 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
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
Blanket Treatment
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
Safe On
Chewings Fescue, Fine Fescue, Hard Fescue, Red Fescue, and Tall Fescue
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
Kentucky Bluegrass and Perennial Ryegrass
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
Pre-Emergent
Post-Emergent
| More Info | View Label
Spot Treatment
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
Blanket Treatment
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
Safe On
Bahiagrass, Bentgrass, Bermudagrass, Chewings Fescue, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Tall Fescue, and Zoysiagrass
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
Centipedegrass and St. Augustinegrass
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
Pre-Emergent
Post-Emergent
| More Info | View Label
Spot Treatment
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
Blanket Treatment
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
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
Label Rate:
0.73 - 1.1 fluid ounces per gallon
Cost Effectiveness:
Makes 29.091 - 43.836 gallons
at a cost of
$1.13 - $1.70 per gallon
Blanket Treatment
Label Rate:
0.73 - 1.1 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 29091 - 43836 square feet
at a cost of
$1.13 - $1.70 per 1,000 sqft
Safe On
Annual Ryegrass, Bahiagrass, Bermudagrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Tall Fescue, and Zoysiagrass
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
Bentgrass
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

Questions & Comments
Log in or sign up to leave comment   Log In  Sign Up