To the study of formation of phytophagous true bugs (Insecta: Heteroptera) complex on introduced coniferous in Donbass

Abstract

Three species of true bugs: Dichrooscytus gustavi Josifov, 1981 (Miridae), Gonocerus juniperi HerrichSchaeffer, 1839 (Coreidae) and Chlorochroa pinicola (Mulsant & Rey, 1852) (Pentatomidae) was firstly found during the reconnoiter surveillance of specialized phytophagous Hemiptera (Heteroptera) on introduced coniferous in the territory of Donbass for the period 2019–2020. Two species (G. juniperi and C. pinicola) are recorded for the first time for the southeast of Ukraine, D. gustavi - for the first time for Ukraine. The paper presents information on the distribution, biology and ecology of the recorded species. Dichrooscytus gustavi and G. juniperi are trophically associated with junipers (Juniperus spp.), C. pinicola – with pines (Pinus spp.). The expansion of phytophagous species composition on pines in Donbass is a consequence of active forest management activities. In addition to the nearby invaders, which include C. pinicola, an increase in the number of dangerous alien invasive pests such as Leptoglossus occidentalis Heidemann, 1910 (Heteroptera: Coreidae) has recently been observed on pines. The invasion of the sucking-feeders species on junipers into Donbass may be the result of massive import potted crops of this breed from nurseries and independent dispersal of this insects from adjacent territories. An increase of the number of sucking pests - the main vectors of viral and phytoplasmic diseases on pines and junipers can negatively affect the decorative and sanitary condition of coniferous plantations in Donbass. To develop a forecast of harmfulness and a complex of protective measures, it is necessary to control the appearance of new phytophagous species on introduced coniferous and to constantly monitor the state of their populations.