Biopreparations application in Aesculus hippocastanum plantings

Purpose. To determine the effectiveness of integrated biological protection of urban chestnut (Aésculus Hippocástanum L.) plantations affected by chestnut borer and rust. Methods. Field, laboratory, method of photofixation of the results of the field experiment. Results. The positive effect of treatment with biological products on the phytosanitary condition of chestnut leaves was established, which was confirmed by photographic fixation and analysis of the content of photosynthetic pigments. In unaffected treated leaves, the nitrogen content is almost twice as high as in the leaves of untreated chestnuts, which is an important factor for plant growth and development. Increased absorption of macronutrients (phosphorus, potassium) and trace elements (iron, cobalt, copper, zinc) in untreated trees is a mechanism of adaptation to stress caused by pests and diseases. Conclusions. Thanks to the combination of biological products with fungicidal, insecticidal and acaricidal action, it is possible to effectively reduce and control the phytosanitary condition of urban plantings.