AC Nordica alfalfa

• Published in: Canadian Journal of Plant Science
• Main Authors: Goplen, B. P., Gossen, B. D.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1994
• Subjects: Horticulture; Plant Science; Agronomy and Crop Science; Canada; Peace River
• Online Access: http://dx.doi.org/10.4141/cjps94-030; http://www.nrcresearchpress.com/doi/pdf/10.4141/cjps94-030

AC Nordica alfalfa (Medicago sativa L.) was developed by the Agriculture Canada Research Station at Saskatoon, Saskatchewan. It is similar to Beaver alfalfa in having a broad crown and a tap root with many branches. AC Nordica is 1–2 d earlier in maturity than Beaver. It is shorter than Beaver at 10% bloom, is slightly slower in regrowth following harvest, and displays less spring vigor. However, it excels in winter hardiness, rating similar to Anik and Drylander alfalfa. AC Nordica is highly resistant to bacterial wilt (Clavibacter michiganense subsp. insidiosum [McCulloch] Davis, Gillaspie, Vidaver & Harris), and moderately resistant to snow mold (Coprinus psychromorbidus Redhead & Traquair). AC Nordica is intended as a special-purpose cultivar for the northern prairies, the Peace River area of Alberta, and other high snowfall areas where snow mold (winter crown rot) may occur and where extreme winter hardiness is required. Key words: Alfalfa, Medicago sativa, winter hardiness, winter crown rot, snow mold, cultivar description