Role of entomophages of the classes Coleoptera, Coccinellidae, Diptera and Syrphidae in the population regulation of Acizzia jamatonica (Kuwayama, 1908) in the Central zone of Krasnodar krai

Acizzia jamatonica (Kuwayama, 1908) is one of the most dangerous pests of Albizia julibrissin Durazz., 1772. A high pest population can lead to defoliation and death of the plant, and growing in forested areas makes it impossible to use chemical methods to protect the plant from Acizzia jamatonica (Kuwayama, 1908). the aim of this work was to study the species composition of predatory insects occurring in plantings of Albizia julibrissin Durazz., 1772 and to evaluate their regulatory activity against Acizzia jamatonica (Kuwayama, 1908). the work was carried out in the forest and park areas of Krasnodar, plantings of the farm “Kuban” and FRCBPP in 2022 and 2023 (2nd agroclimatic zone). to study insect biodiversity in the plantations of Albizia julibrissin Durazz., 1772, Malesa traps were installed, and insects were counted by mowing in the crown of trees. in 2022, the phytophagous development began in the first decade of April. the first peak of abundance was observed at the beginning of the first decade of May – 0.72 ex/m². the second peak of abundance was observed at the beginning of the third decade of June – 0.88 ex/m². the maximum number of insects was found at the end of August – 1.08 ex/m². in 2023, the highest population density of Acizzia jamatonica (Kuwayama, 1908) was observed at the end of the third decade of September – 1.24 ex/m². As a result of the study, the species composition of entomophagous insects feeding on Acizzia jamatonica (Kuwayama, 1908) in Albizia julibrissin Durazz., 1772 plantings was determined. Among the family Syrphidae the following were found in Albizia plantings: episyrphus balteatus (De Geer, 1776), Scaeva pyrastri (linnaeus, 1758), Sphaerophoria scripta (linnaeus, 1758), eupeodes corollae (Fabricius, 1794), Paragus albifrons (Fallen, 1817), Platycheirus podagratus (zetterstedt, 1838), Platycheirus peltatus (Meigen, 1822), Melanostoma mellinum (linnaeus, 1758), Syrphus ribesii (linnaeus, 1758), Baccha elongate (Fabricius, 1775), Volucella zonaria (Poda, 1761), Myathropa florea (linnaeus, 1758), eristalis tenax (linnaeus, 1758), eristalis arbustorum (linnaeus, 1758). the most common species were: episyrphus balteatus (De Geer, 1776), Sphaerophoria scripta (linnaeus, 1758). these species represented 33% and 30% of the total number of syrphids in the study areas. Five species of the family Coccinellidae were recorded: harmonia axyridis (Pallas, 1773), Coccinella septempunctata (linnaeus, 1758), Propylea quatuordecimpunctata (linnaeus, 1758), Adalia bipunctata (linnaeus, 1758), hippodamia variegate (Goeze, 1777). the most abundant coccinellid was harmonia axyridis (Pallas, 1773), its share was 60% of the total coccinellid fauna, the second most abundant was Propylea quatuordecimpunctata (linnaeus, 1758) – 25%. ecological relationships were established between Volucella zonaria (Poda, 1761) and the wasp Vespula vulgaris (linnaeus, 1758) with Acizzia jamatonica (Kuwayama, 1908).

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