Lawn Disease Issues:
Turf diseases – May appear as a brown ring or spot, this may be two spots in a healthy lush lawn. Diseases can appear in your lawn at any time and can appear out of random. The diseases that attack cool season lawns like tall fescue and Kentucky bluegrass are worse during the late spring and summer months. Most of these lawn diseases are intensified when the lawn has excessive moisture from rain or irrigation.
Not every brown spot or brown area in a lawn is caused by a disease. Many things can cause brown areas in the lawn that creates these issues:
Lawn Disease Issues
- Heat
- Drought
- Shade
- Traffic
- Soil issues
- Root zone issues
Damage that resembles disease symptoms may also result from incorrect watering, fertilizing, or mowing practices. Damage from dog urine, chemical fertilizer burn damage, extremely high or low temperatures, competing vegetation, or thatch that is more than 1/2 inch thick.
To prevent lawn diseases, employ cultural practices that promote a dense, vigorous, actively growing grass with good recuperative ability. Good cultural practices include irrigation, fertilization, mowing, soil cultivation, and thatch removal. Cultural practices that help prevent specific diseases.
It can be difficult to determine the difference between a fungal disease and some other problem that is causing your damage to your lawn without proper evaluation.
Here is more information: https://megagrass.com/blogs/guide/common-lawn-diseases
Here is more information: https://jdorganiclandscape.com/2020/01/17/the-best-lawn/