Which irrigation practice is most effective at reducing disease risk in turf by limiting leaf wetness?

Which irrigation practice is most effective at reducing disease risk in turf by limiting leaf wetness?

• A. Excessive or irregular irrigation increases leaf wetness and disease risk.
• B. Precise, deep watering reduces stress and pest susceptibility.
• C. No irrigation affects disease risk.
• D. Frequent shallow watering increases pest susceptibility.

Answer: (B)

Leaf wetness duration is a major factor in turf disease development because many pathogens need free moisture on leaf surfaces to germinate and infect. Watering deeply and precisely minimizes the time leaves stay wet by avoiding frequent, surface-saturating applications. Deep, targeted watering feeds the roots and supports healthy turf without keeping the foliage damp, which reduces disease risk. It also helps reduce drought stress, which can make turf more susceptible to infections. In contrast, excessive or irregular irrigation keeps leaves wet longer, no irrigation stresses the grass and can weaken defenses, and frequent shallow watering continually coats the leaf surface with moisture, all of which increase disease pressure.

Leaf wetness duration is a major factor in turf disease development because many pathogens need free moisture on leaf surfaces to germinate and infect. Watering deeply and precisely minimizes the time leaves stay wet by avoiding frequent, surface-saturating applications. Deep, targeted watering feeds the roots and supports healthy turf without keeping the foliage damp, which reduces disease risk. It also helps reduce drought stress, which can make turf more susceptible to infections. In contrast, excessive or irregular irrigation keeps leaves wet longer, no irrigation stresses the grass and can weaken defenses, and frequent shallow watering continually coats the leaf surface with moisture, all of which increase disease pressure.