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United States Department of Agriculture

Agricultural Research Service

Title: Evaluation of Resistance of Sugarbeets to Seedling Disease Caused by Aphanomyces Cochlioides: a Disease Scoring System and Discrimination Between Resistant and Susceptible Varieities in a Rolled Towel System

item Halloin, John

Submitted to: Annual Beet Sugar Development Foundation Research Report
Publication Type: Experiment Station
Publication Acceptance Date: May 21, 1998
Publication Date: N/A

Technical Abstract: The fungus Aphanomyces cochlioides causes serious crop losses in sugarbeets due to seedling disease. Reliable methods are needed to evaluate resistances of varieties to the disease. A method was developed in which seedlings are inoculated with spores of the fungus and then incubated in a growth chamber. Seedlings of a susceptible variety treated in this manner showed more disease after 4 or 5 days than did those of a resistant variety. This method will provide a useful assay for evaluating host resistance to this seedling disease, thereby helping breeders to develop varieties with better disease resistance.

Last Modified: 4/22/2015
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