Species composition of the mycobiota of the Sievers apple tree (Malus sieversii (Ledeb) M. Roem.) in Kazakhstan

The mycobiota of the Sievers apple tree on the territory of the fruit forests of Kazakhstan (Tarbagatai, Ketmen, Karatau, Altyn-Emel, Talassky, Zailiysky and Dzhungarsky Alatau ranges) includes 64 species of fungi from threedivisions. The most widely represented division is Ascomycota – 48 species, and for the genera Cytospora, Aspergillus,Alternaria, the largest number of species is noted (4 species, 3 and 3 species, respectively). The largest group of fungi of21 species causes damage to apple fruits. Fungus species causing apple tree trunk rot and wood rot are considered to bethe most harmful.