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Gray Leaf Spot Fungicide

Cercospora zeae-maydis Fungicide

Description of Gray Leaf Spot (Cercospora zeae-maydis):
Gray leaf spot is somewhat self-descriptive, but it appears as spots that are round to oval and are tan in the middle with a dark brown border. When the humidity is very high, the spots turn gray and are profusely fuzzy with spores. It is often confused with Pythium blight in perennial ryegrass and tall fescue.
According to the manufacturer approved labels: The following 5 fungicides, applied at the listed application rates, will control Gray Leaf Spot.
Preventative
Curative
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Broadcast Treatment
Label Rate:
2 lbs per 1,000 sqft
Cost Effectiveness:
Covers 5000 square feet
at a cost of
$2.20 per 1,000 sqft
Preventative
Curative
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Blanket Treatment
Application Interval:
14 days
Label Rate:
1.2 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 13333 square feet
at a cost of
$2.81 per 1,000 sqft
Instructions:
Apply when conditions are favorable for disease development.
Note: This rate is for residential turfgrass.
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Preventative
Curative
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Broadcast Treatment
Application Interval:
14 - 28 days
Label Rate:
2 - 4 lbs per 1,000 sqft
Cost Effectiveness:
Covers 7500 - 15000 square feet
at a cost of
$6.48 - $12.95 per 1,000 sqft
Instructions:
 Begin applications before disease is present and continue applications while conditions are favorable for disease development.
Preventative
Curative
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Blanket Treatment
Application Interval:
14 days
Label Rate:
1 - 2 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 16000 - 32000 square feet
at a cost of
$1.72 - $3.45 per 1,000 sqft
Instructions:
Apply when conditions are favorable for disease development. If using the 1 fl. oz. per 1000 sq. ft. rate, tank mix with a registered contact fungicide at the label rate.
Preventative
Curative
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Blanket Treatment
Application Interval:
14 days
Label Rate:
4 - 6 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 5333 - 8000 square feet
at a cost of
$7.87 - $11.80 per 1,000 sqft
Instructions:
Apply preventative application before expected period of diseasedevelopment. Continue applications at 14 day intervals.