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Puccinia punctiformis Affects Growth and Reproduction of Canada Thistle (Cirsium arvense)

Published online by Cambridge University Press:  12 June 2017

Rosemary F. Thomas
Affiliation:
Dep. Biology, Hood College, Frederick, MD 21701
Thomas J. Tworkoski
Affiliation:
Appalachian Fruit Res. Stn., USDA-ARS, Kearneysville, WV 25430
Richard C. French
Affiliation:
Foreign Disease-Weed Science USDA-ARS, Fort Detrick, Frederick, MD 21702
Gerald R. Leather
Affiliation:
Foreign Disease-Weed Science USDA-ARS, Fort Detrick, Frederick, MD 21702

Abstract

In growth chamber research, infection by Puccinia punctiformis, a rust fungus, reduced flowering and vegetative reproduction in Canada thistle. Disease symptoms were greatest when Canada thistle roots were stored at 5, 10, or 15 C following inoculation. Exposure of roots to different temperatures before inoculation did not affect disease. All Canada thistle clones tested, regardless of gender became diseased although there were differences in susceptibility to P. punctiformis.

Type
Research
Copyright
Copyright © 1994 by the Weed Science Society of America 

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