1. Environmental Sciences Dep.; Nova Scotia Agricultural College; PO Box 550 21 Cox Rd. Truro NS Canada B2N 5E3
2. Agriculture and Agri-Food Canada; Potato Research Centre; PO Box 20280 Fredericton NB Canada E3B 4Z7
3. Agriculture and Agri-Food Canada; 4016 Southampton Rd. Nappan NS Canada B0L 1C0
4. Agriculture and Agri-Food Canada; Brandon Research Centre; Grand Valley Rd. Brandon MB Canada R7A 5Y3