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A field method for evaluating frost injury to lucerne

Published online by Cambridge University Press:  27 March 2009

D. G. Stout ,
J. Hall ,
Barbara Brooke  and
T. Moore
D. G. Stout
Affiliation:
Agriculture Canada, Research Station, 3015 Ord Road, Kamloops, B.C. V2B SA9
J. Hall
Affiliation:
Agriculture Canada, Research Station, 6660 N.W. Marine Drive, Vancouver, B.C. V6T 1X2
Barbara Brooke
Affiliation:
Agriculture Canada, Research Station, 3015 Ord Road, Kamloops, B.C. V2B SA9
T. Moore
Affiliation:
B.C.M.A. & F., 162 Oriole Road, Kamloops, B.C. V2C 4N7
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Summary

Following a winter with low temperatures during a period with no snow cover, lucerne (alfalfa; Medicago sativa L.) plants were dug from the field and various root and crown lesions were identified and rated according to severity. The plants were then put into pots of soil and grown for 6 weeks to determine if they would live or die. The relationship between lesions present at the time of digging and survival was then studied to see if the lesions could be used to predict survival. Injuries to several characteristics were found to be associated with plant death: bud vigour, leaf vigour, resistance of root bark to peeling, resistance of root to squeezing, root interior colour and, depending on site, the presence of fungi on the root surface. A model combining injury ratings for three characteristics (bud vigour, root colour, and root resistance to peeling) was developed and survival probabilities based on this model are presented. Use of this model will allow for an early evaluation of low-temperature injury without having to wait for aerial growth to occur.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 111 , Issue 1 , August 1988 , pp. 171 - 177
Copyright
Copyright © Cambridge University Press 1988

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