In Ukraine, the horse-chestnut leaf-miner (Cameraria ohridella Deschka & Dimic, 1986) was first discovered in 2002 in the Lviv region. Currently, the species is widespread in Ukraine and its range continues to expand. The consequence of the life activity of the miner lies in severe damage to the leaves and premature defoliation, negatively affecting the accumulation of reserves of nutrients necessary to maintain the vitality of plants in the winter and restore growth in the spring. The article provides data on the first detection and further spread of the invasive pest of horse-chestnuts C. ohridella in the world and on the territory of Ukraine. The phytosanitary condition of horse-chestnut trees (Aesculus hippocastanum L.) in the conditions of urban plantations in Makariv town, Buchansky district, Kyiv region in 2022 was studied. The data of the seasonal dynamics of the number of the pest, tracked with the help of pheromone monitoring, are given. In the course of route surveys of horse chestnut plantations, the phytosanitary condition of the trees on both sides of the road in the city of Makariv along Dmitriy Rostovsky Street and on the territory of the Makariv Lyceum No. 1 was assessed according to the following criterias: damage to the crown, the degree of damage to the leaf plates, and the overall vitality of the trees. The condition of each tree was assessed with a certain number of points according to the appropriate methods. According to the conducted surveys, it was found that the trees that were located on the isolated territory of the Lyceum suffered less damage from the phytophagus during the month and had significantly higher vitality and decorativeness, compared to the horse-chestnuts that grew along the road. Phytophage pheromone monitoring showed that the number of C. ohridella recorded in traps on both sides of the roadway on Dmitry Rostovsky Street significantly exceeded the number of insects caught on the territory of the educational institution. A clear inverse relationship between the number of insects caught and meteorological conditions was established: during heavy rains with high air humidity, the flight of the chestnut miner almost completely stopped, and the number of insects in the traps was close to zero, and vice versa
Aesculus hippocastanum; state of plantations; phytosanitary assessment; Cameraria ohridella; pheromones; monitoring; abiotic and anthropogenic influence
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