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Paweł Węgrzynowicz
Research Institute of Horticulture, Apiculture Division, Kazimierska 2, 24-100 Puławy, Poland
Dariusz Gerula
Research Institute of Horticulture, Apiculture Division, Kazimierska 2, 24-100 Puławy, Poland
Małgorzata Bieńkowska
Research Institute of Horticulture, Apiculture Division, Kazimierska 2, 24-100 Puławy, Poland
Beata Panasiuk
Research Institute of Horticulture, Apiculture Division, Kazimierska 2, 24-100 Puławy, Poland