Analiza stężenia pyłku leszczyny w 2013 r. w wybranych miastach Polski

The paper presents the course of hazel pollen season in Bydgoszcz, Drawsko Pomorskie, Lublin, Piotrkow Trybunalski, Sosnowiec, Szczecin, Warszawa and Wroclaw in year 2013. The beginning of pollen season of hazel was delayed and started at the third decade of February in Drawsko Pomorskie, Bydgoszcz, Piotrkow Trybunalski and Szczecin and in the first decade of March in Wroclaw, Sosnowiec, Warszawa and Lublin. The highest daily pollen concentrations of hazel and annual totals were registered in Lublin and Wroclaw.