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.
The distinction influences how the pathogen survives or endures during periods without a compatible host, particularly when the sexual phase is present. The pathogen then undergoes sexual reproduction to produce ascospores inside asci before enclosing them in perithecia.