Ascospores are forcibly released from the asci at the end of a rain event following a dry period and are splashed by water or carried by wind to host leaves and flower stems. When the ascospores reach the host plant, the infection cycle begins. There is usually one cycle per growing season which takes place during the spring, but if moist conditions continue throughout the growing season, apothecia can form on dead tissue of infected leaves that are still attached to the plant host.
Ascospores are expelled from the asci at the conclusion of a rainy spell following a dry period, and are transported by water or wind to the host's foliage and flower stalks. Upon reaching the host plant, the infection process begins. Usually, one cycle occurs annually during spring, but if moisture is maintained throughout the season, apothecia can develop on dead tissue of infected leaves still connected to the host.