A basic cultural control to reduce turf disease pressure includes which of the following?

• A. Increasing leaf wetness by frequent irrigation
• B. Proper irrigation, balanced fertility, good drainage, appropriate mowing height, and avoiding leaf wetness
• C. Over-fertilization and high nitrogen
• D. Mowing as low as possible

Answer: (B)

Cultural practices that limit leaf wetness and plant stress reduce turf disease pressure. The most reliable way to keep turf healthier is to shape the environment so pathogens have less opportunity to infect. Proper irrigation minimizes the duration of leaf wetness, avoiding soggy leaves that harbor fungi. Balanced fertility prevents excessive, lush growth that can create dense, vulnerable tissue. Good drainage stops water from pooling and keeps the surface drier, while an appropriate mowing height reduces plant stress and helps the canopy dry more quickly. Together, these measures address moisture, vigor, and canopy structure—all key factors that influence disease development.

That’s why the option listing proper irrigation, balanced fertility, good drainage, appropriate mowing height, and avoiding leaf wetness is the best fit. Increasing leaf wetness, over-fertilization with high nitrogen, or mowing very low all tend to increase disease risk by creating wetter conditions, excess tissue, or stressed plants.