EN
Myzus ascalonicus DONCASTER, 1946 is an anholocyclic and polyphagous species. It may infest plants of over 20 families, most frequently Alliaceae, Caryophyllaceae, Compositae, Brassicaceae, Liliaceae and Rosaceae. It is almost worldwide distributed, also in Subantarctic regions. In winter in Poland it can continue developing by infesting greenhouse and house plants. The study was conducted in 2009–2010. The paper defines the length of prereproduction, reproduction and postreproduction stages of wingless M. ascalonicus females developing in winter. Also the total lifespan and fecundity of females was calculated along with demographic parameters of M. ascalonicus population.