Which cultural management practice is suggested to combat Dollar Spot?

To effectively manage Dollar Spot, avoiding light, frequent watering is a recommended cultural practice. Dollar Spot, caused by the fungus Sclerotinia homeocarpa, thrives in conditions that are both moist and favor a high level of humidity. Light, frequent watering can lead to shallow root systems and creates an environment that is consistently favorable for the development of this disease. When watering practices are adjusted to encourage deeper, less frequent watering, it allows grass to build resilience. By promoting a healthier turf that has deeper roots, the grass can better withstand stress and effectively reduce the likelihood of Dollar Spot establishment.

In contrast, increasing nitrogen fertilization does not directly address the moisture levels that promote Dollar Spot and might even exacerbate the issue by causing overly lush growth. Mowing at a very low height can stress the grass, making it more susceptible to diseases like Dollar Spot. Frequent aeration, while beneficial for overall lawn health, is not a primary means of combatting this particular disease, as it does not directly influence moisture levels or the conditions that encourage the pathogen. Therefore, the key focus on water management as part of cultural practices is crucial in preventing Dollar Spot outbreaks.