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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 5 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
$11.00 per gallon
Blanket Treatment
per
Label Rate:
0.476 ounces per 1,000 sqft
Cost Effectiveness:
Covers 1000 square feet
at a cost of
$11.00 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
| 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
$1.18 - $1.58 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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