Visually, brown patch is circular patches (a few inches to a few feet in diameter) of dead, brown grass sometimes outlined by a purple ring. This disease appears during high humidity and high temperatures. The grass will pull out easily after infection, though the lawn will recover within 2-3 weeks. Brown patch can occur on all grass-types.
The leaf of the grass will exhibit gray irregular lesions with a thin tan/brown outline. In the morning while dew is still present, a film of mycelium (web-like in appearance) can be seen on the turf.
High humidity and temperatures are the key contributors to this turf disease. If brown patch or other funguses tend to infect your lawn, try changing your watering routine first. Instead of frequent, everyday watering's try to water once or twice a week for 15-20 minutes per zone. This will allow water to get deep into the soil to promote root growth, but it will not keep the leaf of the grass wet for prolonged periods.
Fungicides are not usually warranted, though if you need a technician to come out and review the condition of your lawn, feel free to contact us at 419-536-4344.