عنوان مقاله [English]
نویسندگان [English]چکیده [English]
From aerial parts of declining shade trees, a fungus was consistantly recoverd and purified and based on morphological features was identified as Nattrassia mangiferae form 1.The pathogen was isolated from 16 species of plants in 16 families. Pathogenicity of 70 isolates of N. mangiferae was confirmed on10 plant species under naturaland greenhouse conditions.Disease symptoms on the detached stems in the laboratoryappeared in three different types: canker, dense and thin sooty layersof arthrospores. On fresh detached shoots, although the pathogenproduced canker but the progress of the disease was slow with littlesporulation.Minimum , optimum and maximum temperatures for growth onpotato dextrose agar; were 15-20, 30-35, 35-37° C, respectively.Surveying air spora in Shiraz during summer using vaseline coated microscopic slides and Petri plates contaning PDA supplemented with PCNB (100 mg/l) and Benomyl (100 mg/l) withlid off, yielded few spores of N. mangiferae.