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 forcibly ejected from the asci at the end of a rainy period following a dry spell, and are dispersed by water or carried by wind to host leaves and flower stalks. When the ascospores reach the host plant, the infection process commences. Typically, one cycle occurs per growing season, taking place in spring, but if moist conditions persist throughout the season, apothecia can form on dead tissue of infected leaves still attached to the plant host.