Proceedings The Second Joint PSU – UNS International Conference on BioScience: Food, Agriculture and the Environment Jun 22 – 24, 2008 Novi Sad, Serbia Edited by Dr. Zorica Nikolić Editor-in-Chief Prof. Dr. Mirjana Milošević Prof. Dr. Miodrag Zlokolica Dr. Svetlana Balešević-Tubić Dr. Mira Pucarević Dr. Mira Kovačević Technical assistants : Ms. Tamara Letić : Mrs. Snežana Rađenović Graphic designer : Mr. Nenad Ratić English editors : Ms. Tamara Letić Year : 2009 Publisher : University of Novi Sad, Serbia Institute of Field and Vegetable Crops, Novi Sad, Serbia Scientific Institute of Veterinary, Novi Sad, Serbia ISBN : 978-86-499-0171-1 Preface