1. Department of Applied Microbiology and Food Science, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK S7N 5A8.
2. Corresponding author. Phone: 306/966-5028. Fax: 306/966-8898. E-mail: ingledew@sask.usask.ca
3. Agriculture and Agri-Food Canada, Semiarid Prairie Agricultural Research Center, P.O. Box 1030, Swift Current SK S9H 3X2