[Infection of blackflies (Simuliidae) with microsporidians in the Ob and Irtysh reservoirs].

Of 6 species of black flies from 6 water bodies microsporidians P. simulii, P. debaisieuxi and Th. varians are reported only in four species, B. maculata, Sch. pusilla, S. morsitans and S. argyreatum. Peculiarities in the infection of black flies larvae with microsporidians in various types of water bodies within a season were established. Under experimental conditions P. simulii and P. debaisieuxi cause mortality of larvae (68 to 87%) and decrease in the emergence of imago (5 to 19.6%).