The total mortality of the leaf-miner horse-chestnut pest, Cameraria ohridella, collected in nature, and associated with mycoses were assessed under laboratory conditions stages: for eggs rates 9.78% 61.97% found, respectively; caterpillars, 45.25% 5.59%, pupae 21.22% 100%, respectively. At egg stage, Cladosporus cladosporioides caused mycosis most often (27% all mycoses); at caterpillar stage ...