Występowanie i struktura płciowa jasnej i ciemnej formy motyli Cydalima perspectalis Walker w Polsce w latach 2020–2022

Abstract

Cydalima perspectalis moths come in two colour forms – light and dark (melanic). Research carried out in 2020–2022 in Rzeszów, Warsaw and Wrocław examined the share of melanic form of imago coloration in the total population of moths of the spring and first summer generation on boxwood (Buxus sempervirens L.). Due to uncertainty of occurrence, the appearance of the second summer-autumngeneration was not assessed. The research was carried out in field entomological chambers. The most melanic form of moths were found in Rzeszów and Wrocław (southern Poland). In the spring moth generation, the share of the dark-coloured forms ranged from 0 to 11.6% in all localities. It was found that melanic-coloured individuals were more common in the summer generation of moths. Their share in the general population at that time ranged from 1.3 to 15.1%. During the years of research, depending on the locality, sometimes females dominated and sometimes males dominated. There was no clear dominance of one sex.