Stress index and gray leaf spot index

The stress index readings that appear on your PACE Turf Weather Alerts can you give you useful information on the risk to cool-season turf from high temperatures and humidities. Calculated by adding the maximum daily temperature with the minimum daily humidity, a sum of 140 or higher (highlighted in red) indicates a high risk from heat, gray leaf spot and pythium. Green means that the risk of disease or heat-related stress is minimal, and yellow indicates that stressful conditions may…