In the control of brown patch, which factor is important?

• A. Proper fertilization
• B. Proper irrigation
• C. Proper air circulation
• D. All of the above

Answer: (D)

Controlling brown patch hinges on managing environmental and turf conditions that influence the disease. The pathogen thrives when there is leaf wetness, high humidity, and lush, actively growing turf. Proper fertilization helps avoid excessive, succulent growth that can be more susceptible to infection. Proper irrigation reduces the duration of leaf wetness and helps keep moisture levels in check, limiting the favorable conditions the fungus needs. Improving air circulation—through practices like proper mowing height, aeration, and preventing dense canopies—helps the turf dry faster and lowers humidity around the blades. When you combine these cultural practices, you lessen the environment that brown patch relies on, making the disease easier to control. So all three factors—fertilization, irrigation, and air circulation—are important.