Abstract
The article presents data on the detection of mould fungi in the system of Aesculus hippocastanum – Cameraria ohridella which is an invasive pest of chestnuts. Entomological and mycological studies were conducted using standard methods . The study determined the species composition, occurrence index and quantitative indicators of the micromycetes present in the leaf tissues of Aesculus hippocastanum and Cameraria ohridella caterpillars. 135 samples of the caterpillars of three generations of the insects, the mines and the healthy plant leaves collected at the permanent observation points in Saratov city (Astrakhanskaya St., Bolshaya Sadovaya St., Naberezhnaya Kosmonavtov St.) were analysed. 18 species of the fungi of the genera Alternaria, Aspergillus, Cladosporium, Fusarium, Penicillium and Rhizopus were identified. Numerical indicators of fungi ranged from 102 to 105 CFU/g. There was an increase in the quantitative indicators and species diversity of micromycetes during the vegetation period. Aspergillus was the dominant genus of fungi in the first generation of insects, Alternaria dominated in the second generation, and Cladosporium dominated in the third generation. Thus, Ochrid myner can be a natural reservoir of various fungi, including phytopathogenic ones.
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