General: This disease probably causes the most damage on lawn grasses. Many people wonder why their lawn was affected when their neighbor’s lawn was not. The factors relating to a heavy outbreak of this disease are many: too much thatch, a dull mower blade, scalping or excess mowing after the grass has gotten too tall. The main factor, howoever, is the variety of grass in your lawn. Some are very resistant and others, like Kentucky Bluegrass, are not.
Causes: The spores of this fungus cause infection of the grass plant. Spores act like seeds. They are easily spread to healthy plants by wind, water, and equipment. Wet, cool temperatures, high humidity, and cloudy days allow spores to begin to grow and the disease can infect the grass blades and stems.
What to do: Proper lawn management is important to helping control the Leaf Spot disease. Water your lawn in the morning hours to allow ample drying time before evening. Water deeply just one to two times per week. Mow frequently, at least once per week, or more if weather conditions require.
Depending on how severe the disease is and the type of grass in your lawn, it may take up to two months for your lawn to recover. Fungicide applications are recommended when this disease is active. Please call our office or speak to your specialist for recommendations and/or a price quote.