This distinction affects how the pathogen overwinters or survives periods without a susceptible host. If the sexual stage (teleomorph) is present, the pathogen sexually reproduces to form ascospores inside of asci, and subsequently packed into perithecia.
This difference influences how the pathogen hibernates or endures periods without a receptive host. If the sexual stage (teleomorph) is present, the pathogen reproduces sexually to form ascospores within asci and subsequently encloses them in perithecia.