Description of Brown Patch (Rhizoctonia solani):
Brown patch fungus is a turf fungus which appears in a rough, circle-shaped patch that ranges from 6 inches to many feet in diameter. The patches are yellow, tan, or brown and the effected leaves are typically standing upright. The chief distinguishing feature of Rhizoctonia brown patch appears during periods of warm, humid weather, when dark, purplish “smoke rings” half an inch to two inches wide may border the diseased areas.The “smoke rings” are more pronounced in the early morning, usually fading by the middle of the day. “Smoke rings” are more commonly seen on close-cut grass.
CertainLabel™
Brown Patch Optimized Control Options Finder
Legend:
Control
Suppression
No Control
According to the manufacturer approved labels: The following 8 fungicides, applied at the listed application rates, will control Brown Patch.
Broadcast Treatment
per
Label Rate:
2 - 4 lbs per 1,000 sqft
Cost Effectiveness:
Covers 2500 - 5000 square feet
at a cost of
$3.89 - $7.79 per 1,000 sqft
at a cost of
$3.89 - $7.79 per 1,000 sqft
Blanket Treatment
Application Interval:
Late Spring / Early Summer
14 - 28 days
14 - 28 days
per
Label Rate:
1 - 2 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 16000 - 32000 square feet
at a cost of
$1.25 - $2.50 per 1,000 sqft
at a cost of
$1.25 - $2.50 per 1,000 sqft
Instructions:
Begin applications in May or June before disease is present. Tank mix with a registered contact fungicide labeled for brown patch control at the label rate. Under conditions of high temperatures and high humidity, use the higher rates of Quali-Pro Propiconazole 14.3 and shorter application intervals.
Blanket Treatment
Application Interval:
14 days
per
Label Rate:
1.2 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 13333 square feet
at a cost of
$3.00 per 1,000 sqft
at a cost of
$3.00 per 1,000 sqft
Instructions:
Begin applications when conditions are favorable for disease development and before disease symptoms are apparent. If disease is present, mix Eagle 20EW with an EPA registered contact fungicide, such as Fore® T/O fungicide.
Under conditions of high temperature and humidity, use the shorter spray interval.
Note: This rate is for residential turfgrass.
Broadcast Treatment
Application Interval:
14 - 28 days
per
Label Rate:
2 - 4 lbs per 1,000 sqft
Cost Effectiveness:
Covers 7500 - 15000 square feet
at a cost of
$5.34 - $10.68 per 1,000 sqft
at a cost of
$5.34 - $10.68 per 1,000 sqft
Instructions:
Apply when conditions are favorable for disease development.
Blanket Treatment
Application Interval:
14 days
per
Label Rate:
2 - 4 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 8000 - 16000 square feet
at a cost of
$3.22 - $6.44 per 1,000 sqft
at a cost of
$3.22 - $6.44 per 1,000 sqft
Instructions:
Apply when disease first appears and continue at 14 day intervals. Rotations and/or tank mix combinations with Cchlorothalonil, iprodione, or mancozeb (Protect™), can be utilized.
Broadcast Treatment
Application Interval:
14 days
per
Label Rate:
4 lbs per 1,000 sqft
Cost Effectiveness:
Covers 5000 square feet
at a cost of
$9.65 per 1,000 sqft
at a cost of
$9.65 per 1,000 sqft
Instructions:
Begin applications when conditions are favorable for disease development and
before disease symptoms are apparent.
Broadcast Treatment
Application Interval:
14 - 28 days
per
Label Rate:
3 lbs per 1,000 sqft
Cost Effectiveness:
Covers 5000 square feet
at a cost of
$11.99 per 1,000 sqft
at a cost of
$11.99 per 1,000 sqft
Instructions:
Apply when conditions are favorable for disease development.
Broadcast Treatment
Application Interval:
14 days
per
Label Rate:
6 - 9 lbs per 1,000 sqft
Cost Effectiveness:
Covers 3333 - 5000 square feet
at a cost of
$14.39 - $21.58 per 1,000 sqft
at a cost of
$14.39 - $21.58 per 1,000 sqft
Instructions:
For prevention, apply in fall before turf has stopped all growth activity. Apply second application in early Spring when soil temperatures reach 55-60°F or when disease first appears. For curative action, apply when disease first appears in early spring and continue at 14 day intervals.