Which cultural practice helps manage powdery mildew?

Which cultural practice helps manage powdery mildew?

• A. Prune trees and shrubs to increase sunlight and air movement
• B. Increase nitrogen fertilization
• C. Over-irrigate
• D. Apply broad-spectrum fungicides as the sole measure

Answer: (A)

Powdery mildew on turf is favored by shaded, humid conditions with poor air movement. Pruning trees and shrubs to increase sunlight and air movement helps dry leaves more quickly and reduces the humidity around the turf canopy, making the environment less hospitable for the fungus. This cultural approach tackles the conditions that allow the disease to develop, which is why it’s the strongest preventive measure among the options. Raising nitrogen can promote lush, dense growth that retains moisture and can worsen mildew problems. Over-irrigation keeps leaves wet for longer periods, directly encouraging the fungus. Relying on broad-spectrum fungicides as the sole measure ignores the environmental controls that suppress the disease and can lead to resistance or inadequate long-term control.

Powdery mildew on turf is favored by shaded, humid conditions with poor air movement. Pruning trees and shrubs to increase sunlight and air movement helps dry leaves more quickly and reduces the humidity around the turf canopy, making the environment less hospitable for the fungus. This cultural approach tackles the conditions that allow the disease to develop, which is why it’s the strongest preventive measure among the options.

Raising nitrogen can promote lush, dense growth that retains moisture and can worsen mildew problems. Over-irrigation keeps leaves wet for longer periods, directly encouraging the fungus. Relying on broad-spectrum fungicides as the sole measure ignores the environmental controls that suppress the disease and can lead to resistance or inadequate long-term control.