For reducing gray spot in St. Augustinegrass, what timing recommendation is given?

For reducing gray spot in St. Augustinegrass, what timing recommendation is given?

• A. Irrigate in the early morning to allow drying time
• B. Irrigate late at night
• C. Do not irrigate at all
• D. Irrigate during the hottest part of the day

Answer: (A)

Managing gray spot on St. Augustinegrass comes down to how long the leaf blades stay wet after irrigation. The fungus causing gray spot needs that surface moisture to infect, so you want the grass to dry quickly. Watering in the early morning gives the turf enough moisture for the roots, but the daytime sun and breezes help leaves dry fast, shortening the leaf-wetness window and reducing disease risk. Watering late at night keeps leaves wet all night, creating ideal conditions for gray spot to develop. Not watering at all stresses the plant, and watering during the hottest part of the day isn’t ideal for drying and can still leave leaves wet during humid periods. So, the recommended timing is to irrigate in the early morning to allow drying time.

Managing gray spot on St. Augustinegrass comes down to how long the leaf blades stay wet after irrigation. The fungus causing gray spot needs that surface moisture to infect, so you want the grass to dry quickly. Watering in the early morning gives the turf enough moisture for the roots, but the daytime sun and breezes help leaves dry fast, shortening the leaf-wetness window and reducing disease risk. Watering late at night keeps leaves wet all night, creating ideal conditions for gray spot to develop. Not watering at all stresses the plant, and watering during the hottest part of the day isn’t ideal for drying and can still leave leaves wet during humid periods. So, the recommended timing is to irrigate in the early morning to allow drying time.