Which of the following is NOT a clue to identifying turfgrass diseases?

The type of fertilizers used is not a direct clue for identifying turfgrass diseases. While fertilizers can contribute to overall plant health and vigor, they do not typically provide specific information about the presence or nature of a turfgrass disease. In contrast, symptoms or signs of the problem, the species of turfgrass affected, and weather and site conditions are all critical factors that can help diagnose turfgrass diseases. Symptoms such as discoloration, wilting, or abnormal growth patterns are clear indicators of disease, while knowing the specific species of turfgrass can help narrow down potential diseases that may commonly affect that type. Additionally, weather patterns and site conditions, such as moisture levels or temperature fluctuations, often play key roles in disease development and can aid in identifying the specific issues affecting the turf.