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Giant Ragweed Weed Killer

Ambrosia trifida Herbicide

Description of Ragweed, Giant (Ambrosia trifida):
Giant ragweed is actually a member of the sunflower family. It can reach heights between 3 and 16 feet. It's easily found along fence rows of crops and pastures. Its pollen is one of many causes of late-season hay fever, making it insufferable for those with allergies.
According to the manufacturer approved labels: The following 11 weed killers, applied at the listed application rates, will control Giant Ragweed.
Pre-Emergent
Post-Emergent
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Spot Treatment
Label Rate:
0.476 ounces per gallon
Cost Effectiveness:
Makes 1 gallons
at a cost of
$14.52 per gallon
Blanket Treatment
per
Label Rate:
0.476 ounces per 1,000 sqft
Cost Effectiveness:
Covers 1000 square feet
at a cost of
$14.52 per 1,000 sqft
Safe On
Bahiagrass, Bentgrass, Bermudagrass, Buffalograss, Centipedegrass, Fine Fescue, Kentucky Bluegrass, Kikuyu Grass, Perennial Ryegrass, Seashore Paspalum, St. Augustinegrass, Tall Fescue, and Zoysiagrass
Safe Rate:
0.476 ounces per gallon
or
0.476 ounces per 1,000 sqft
CertainLabel™ Calculator for Sedgehammer 5% Halosulfuron-methyl & these grass types
Pre-Emergent
Post-Emergent
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Spot Treatment
Label Rate:
0.016 - 0.032 ounces per gallon
Cost Effectiveness:
Makes 40.949 - 81.899 gallons
at a cost of
$0.82 - $1.63 per gallon
Blanket Treatment
per
Label Rate:
0.008 - 0.015 ounces per 1,000 sqft
Cost Effectiveness:
Covers 85800 - 171600 square feet
at a cost of
$0.39 - $0.78 per 1,000 sqft
Safe On
Bahiagrass, Bentgrass, Bermudagrass, Buffalograss, Centipedegrass, Fine Fescue, Kentucky Bluegrass, Kikuyu Grass, Perennial Ryegrass, Seashore Paspalum, St. Augustinegrass, Tall Fescue, and Zoysiagrass
Safe Rate:
0.016 - 0.032 ounces per gallon
or
0.008 - 0.015 ounces per 1,000 sqft
CertainLabel™ Calculator for Sedgehammer 75% Halosulfurion-methyl & 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:
0.09 - 0.16 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 199131 - 348480 square feet
at a cost of
$0.28 - $0.48 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
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Spot Treatment
Label Rate:
0.67 fluid ounces per gallon
Cost Effectiveness:
Makes 192 gallons
at a cost of
$0.21 per gallon
Blanket Treatment
Label Rate:
3.2 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 40000 square feet
at a cost of
$1.00 per 1,000 sqft
Safe On
Bentgrass, Carpetgrass, Centipedegrass, and Red Fescue
Safe Rate:
0.33 fluid ounces per gallon
or
1.6 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Triple Threat & these grass types
Pre-Emergent
Post-Emergent
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Spot Treatment
Label Rate:
0.73 - 1.1 fluid ounces per gallon
Cost Effectiveness:
Makes 116.364 - 175.342 gallons
at a cost of
$0.19 - $0.29 per gallon
Blanket Treatment
Label Rate:
0.73 - 1.1 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 116364 - 175342 square feet
at a cost of
$0.19 - $0.29 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
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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:
0.37 - 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
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Spot Treatment
Label Rate:
0.2 ounces per gallon
Cost Effectiveness:
Makes 30 gallons
at a cost of
$1.12 per gallon
Blanket Treatment
per
Label Rate:
0.092 - 0.138 ounces per 1,000 sqft
Cost Effectiveness:
Covers 43560 - 65340 square feet
at a cost of
$0.52 - $0.77 per 1,000 sqft
Safe On
Bermudagrass, St. Augustinegrass, and Zoysiagrass
Safe Rate:
0.069 - 0.275 ounces per 1,000 sqft
CertainLabel™ Calculator for Fahrenheight & these grass types
Pre-Emergent
Post-Emergent
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Spot Treatment
Label Rate:
0.37 fluid ounces per gallon
Cost Effectiveness:
Makes 86.032 gallons
at a cost of
$2.08 per gallon
Blanket Treatment
Label Rate:
0.37 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 86032 square feet
at a cost of
$2.08 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
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Spot Treatment
Label Rate:
0.55 - 0.75 fluid ounces per gallon
Cost Effectiveness:
Makes 170.667 - 232.727 gallons
at a cost of
$0.61 - $0.83 per gallon
Instructions:
See label page 5 and 6 for more detailed information.
Blanket Treatment
Label Rate:
0.55 - 0.75 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 170667 - 232727 square feet
at a cost of
$0.61 - $0.83 per 1,000 sqft
Instructions:
See label page 5 and 6 for more detailed information.
Safe On
Annual Ryegrass, Bahiagrass, Bentgrass, Bermudagrass, Buffalograss, Carpetgrass, Centipedegrass, Fine Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Seashore Paspalum, St. Augustinegrass, Tall Fescue, and Zoysiagrass
Safe Rate:
0.55 - 0.75 fluid ounces per gallon
or
0.55 - 0.75 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Basagran T/O & these grass types
Pre-Emergent
Post-Emergent
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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
No spot treatment rates listed. Please, review the label or contact the merchant for more information.
Blanket Treatment
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
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:
1.1 - 1.47 fluid ounces per 1,000 sqft
CertainLabel™ Calculator for Coastal & these grass types

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