Phyllosphere and phylloplane fungi of qat in Sana'a, Yemen Arab Republic.

Eighty six species belonging to thirty one genera were collected from the qat phyllosphere (30 genera and 78 species) and phylloplane (20 genera and 64 species) of 24 varieties tested. In the phyllosphere the most frequent genera were Cladosporium, Aspergillus and Alternaria followed by Penicillium, Drechslera, Fusarium, Curvularia, Phoma and Chaetomium. From the preceding genera the most prevalent species were C. herbarum, C. macrocarpum, A. niger, A. flavus, A. alternata, A. phragmospora, P. citrinum, P. notatum, D. spicifera, D. halodes, D. hawaiiensis, F. oxysporum, F. moniliforme, C. lunata, P. humicola, P. herbarum and C. globosum. In the phylloplane the order of genera frequency was more or less the same, while the most common species were C. herbarum, C. sphaerospermum, A. niger, A. flavus, A. alternata and A. tenuissima.