Causal agents of corn (Zea mays) fungal leaves diseases in Primorsky Region.
Maize leaf mycobiota structure in Primorsky territory was studied during 1991-99. Twenty fungal species from 4 classes were found. Loculoascomycetes and Teliomycetes were represented by one species, Hyphomycetes by 12 species and Coelomycetes by 6 species. Four species, namely Mycosphaerella zeae, Bipolaris sacchari, Curvularia clavata and C. ovoidea, are reported on maize for the first time in Russia. By frequency of occurrence, one species, i.e. Exserohilum turcicum [Setosphaeria turcica], is principal (with 100% frequency of occurrence); 4 species, i.e. M. zeae, Bipolaris maydis [Cochliobolus heterostrophus], B. zeicola [Cochliobolus carbonum] and Epicoccum nigrum, are additional (26.8-34.1%), while the others are accidental (2.4-22.0%). E. turcicum is also a dominant species (with 51.6% degree of domination), followed by B. maydis (14.5%) and B. zeicola (11.7%).