Which of the following is part of MSU's necrotic ring spot management regime?

• A. Light daily irrigation
• B. Monthly applications of a slow-release N fertilizer
• C. Deep sprinkler irrigation
• D. Fungicide rotations

Answer: (A)

Keeping the turf from drought stress through consistent, light moisture is a key cultural approach for necrotic ring spot. The fungus that causes this disease tends to take advantage of stressed roots, so providing just enough water daily helps keep the roots and crowns healthy and the turf dense, reducing susceptibility and symptom development. Deep or heavy irrigation can create waterlogged conditions and prolonged leaf wetness that favor other problems, while too much nitrogen can promote weak, lush growth that doesn't resist stress as well. Fungicide rotations are a chemical control step, but the regime highlighted here focuses on moisture management to sustain vigor and prevent stress that enables the disease.