With properly selected cultivars and timely mowing, fertilization, and irrigation, which disease still has the potential to decimate a lawn on a site that receives ample sunlight?

With properly selected cultivars and timely mowing, fertilization, and irrigation, which disease still has the potential to decimate a lawn on a site that receives ample sunlight?

• A. Pythium blight
• B. Brown patch
• C. Dollar spot
• D. Fairy ring

Answer: (A)

The situation hinges on a disease that canStill overwhelm even a well-maintained lawn when leaf surfaces stay wet in warm conditions. Pythium blight is notorious for causing rapid, widespread dieback because the pathogens thrive on wet, warm leaves and spread quickly via irrigation water and rain splash. Even with properly chosen cultivars and timely mowing, fertilization, and irrigation, an outbreak can decimate turf on a site that receives ample sunlight if leaf wetness persists (for example, from evening irrigation or heavy dew). The practical takeaway is to minimize leaf wetness—water early in the day, ensure good drainage, avoid overhead irrigation at night, and apply preventive fungicides when risk is high—to reduce the chance of a devastating Pythium blight outbreak. The other diseases tend to be less explosive under good cultural practices; they can occur, but they’re not typically associated with sudden, entire-lawn collapse on sunlit sites.

The situation hinges on a disease that canStill overwhelm even a well-maintained lawn when leaf surfaces stay wet in warm conditions. Pythium blight is notorious for causing rapid, widespread dieback because the pathogens thrive on wet, warm leaves and spread quickly via irrigation water and rain splash. Even with properly chosen cultivars and timely mowing, fertilization, and irrigation, an outbreak can decimate turf on a site that receives ample sunlight if leaf wetness persists (for example, from evening irrigation or heavy dew). The practical takeaway is to minimize leaf wetness—water early in the day, ensure good drainage, avoid overhead irrigation at night, and apply preventive fungicides when risk is high—to reduce the chance of a devastating Pythium blight outbreak. The other diseases tend to be less explosive under good cultural practices; they can occur, but they’re not typically associated with sudden, entire-lawn collapse on sunlit sites.