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Abstract <p>The chestnut leaf miner was found in Vologda, Veliky Novgorod, and in all districts of Leningrad region, with the exception of Podporozhsky and Lodeynopolsky, and was not found in Petrozavodsk in Karelia. In Leningrad region, chestnut damage by <i>Cameraria ohridella</i> caterpillars was highest in its central part from Volkhov to Kirovsk, Vsevolozhsk, St. Petersburg, Zelenogorsk, Oranienbaum, and Sosnovy Bor; in the west, in Gatchina, Volosovo, and Kingisepp; and in the south, in Kirishi and in Luga. In 2024, the maximum damage to chestnut leaves by chestnut leaf miner caterpillars was recorded in Vsevolozhsk (75–100%, 93.4% on average). The lowest damage (0.8–1.3%) to leaves was observed in the north of the region in the Vyborg and Priozersk districts, as well as in the eastern districts of Tikhvin (2.5%) and Boksitogorsk (0.2%) and in Vologda (1.2%) with an average January temperature below −9°C. In the Vyborg and Priozersk districts, the chestnut moth developed in two generations; in the Tikhvin, Boksitogorsk districts and in Vologda, in one generation; and in the remaining districts of the Leningrad Region, in three full generations per year. For the first time, the differences in the biological characteristics of the development of 6th and 7th instar chestnut moth caterpillars, an increase in the size of moth caterpillars in cooler climates, and the main factors in the spread of <i>C. ohridella</i> in Leningrad region were also established.</p>

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Distribution, Harmfulness, and Biological Features of an Invasive Species of the Chestnut Mining Moth (Cameraria ohridella Deschka & Dimic) (Lepidoptera, Gracillariidae) in Leningrad and Surrounding Regions

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • V. G. Kaplin

摘要

Abstract

The chestnut leaf miner was found in Vologda, Veliky Novgorod, and in all districts of Leningrad region, with the exception of Podporozhsky and Lodeynopolsky, and was not found in Petrozavodsk in Karelia. In Leningrad region, chestnut damage by Cameraria ohridella caterpillars was highest in its central part from Volkhov to Kirovsk, Vsevolozhsk, St. Petersburg, Zelenogorsk, Oranienbaum, and Sosnovy Bor; in the west, in Gatchina, Volosovo, and Kingisepp; and in the south, in Kirishi and in Luga. In 2024, the maximum damage to chestnut leaves by chestnut leaf miner caterpillars was recorded in Vsevolozhsk (75–100%, 93.4% on average). The lowest damage (0.8–1.3%) to leaves was observed in the north of the region in the Vyborg and Priozersk districts, as well as in the eastern districts of Tikhvin (2.5%) and Boksitogorsk (0.2%) and in Vologda (1.2%) with an average January temperature below −9°C. In the Vyborg and Priozersk districts, the chestnut moth developed in two generations; in the Tikhvin, Boksitogorsk districts and in Vologda, in one generation; and in the remaining districts of the Leningrad Region, in three full generations per year. For the first time, the differences in the biological characteristics of the development of 6th and 7th instar chestnut moth caterpillars, an increase in the size of moth caterpillars in cooler climates, and the main factors in the spread of C. ohridella in Leningrad region were also established.