Structure of population Harmonia axiridis (Pallas, 1773) by the southwestern part of the Sumy region

DOI: https://doi.org/10.7124/FEEO.v36.1707
Keywords: Harmonia axyridis (Pallas, 1773), color variants, occurrence in the population, Sumy region

Abstract

Aim. The occurrence of color variants of Harmonia axyridis (Pallas, 1773) based on the color of the imago elytra in the territory of the village of Vorozhba and the village of Kurgan, Sumy district, Sumy region, was studied. Methods. Collection of adults in the spring-autumn period of 2023–2024. carried out manually according to the route method of visual inspection of plants, walls and windows of non-residential and residential premises, fences, etc. The distribution of color variants of Harmonia axyridis (Pallas, 1773) was carried out according to Tan's classification. Results. On the territory of both villages, the presence of 3 variants of the color of the species was established: succinea, spectabilis, сonspicua. The most common were imagos of the succinea variant, the least common – of the conspicua variant. In the succinea group, 18 color variants and 3 subforms were identified: novemdecimsignat, frigida та succinea/siccoma. Conclusions. In the local populations of Harmonia axyridis (Pallas, 1773) in the territory of the village of Vorozhba and Kurgan, the phenotypic polymorphism of the species is confirmed by the color variants of the imago elytra. The ratio of color variants of succinia, spectabilis, conspicua, in particular, depending on the season, is determined by their various biological features.

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