Which pair of cultural practices helps reduce turf disease pressure?

• A. Schedule irrigation to minimize leaf wetness early morning and improve air movement through aeration and mowing.
• B. Increase fertilization and increase mowing height.
• C. Decrease aeration and keep leaves wet.
• D. Water at night and avoid mowing.

Answer: (A)

Reducing turf disease pressure hinges on keeping the leaf surface dry and promoting airflow around the canopy. Many turf pathogens require leaf wetness to infect and spread, so limiting how long leaves stay wet lowers disease risk. Watering in the early morning allows time for the turf to dry during the day. At the same time, improving air movement with aeration and mowing reduces humidity at the leaf surface and speeds evaporation, making conditions less favorable for pathogens. The combination of dry leaf surfaces and better canopy airflow is the most effective way to reduce disease pressure. Watering at night or keeping leaves wet, for example, would promote disease, and excessive fertilization or poor aeration can lead to lush, dense canopies that retain moisture longer.