* Blumeriello jaopil overwinters in diseased leaves on the ground. Ascospores are released from apothecia around bloom during wet periods. 60-68 degrees F are favorable for disease development. Symptoms can occur in 5 days after infection. Low, Moderate, and Severe risk. Spectrum Weather Data System & Eisensmith & Jones. Phytopathology 71:728-732. First visible symptoms on 29 May, 2009. • Aug 10-12 (no possible cherry leaf spot infection)