pathogenicity of alternaria species isolated from chamaecyparis lawsonia in vitro

Chamaecyparis lawsonia, which brings beauty in parks and green space,is attacked by a variety of pathogenic agents specially fungi. in this study, somechamaecyparis lawsonia available in parks that had disease symptoms weresampled. after sample collection, in order to isolate fungal pathogens, cuts ofthe infected plant tissues were placed on pda (potato dextrose agar) and laterwere put on wa (water agar) for identifying. then test of pathogenicity of theseisolates on chamaecyparis lawsonia was done inside the box with plasticstopper. to do this, cuts of colonies of 4 day fungi obtained on pda mediumwere put on leaves. the final evaluation was performed after 10 days. this experimentwas performed in a completely randomized design with 3 replicationsand 7 treatments. the results showed that isolated fungi are in 2 groups asfollowing: alternaria franseriae and alternaria tenuissima. according to theresults, both species were pathogenic on host. totally, a. franseriae showedmore disease severity compared to a. tenuissima on c. lawsonia.