ISHS Acta Horticulturae 589: X International Asparagus Symposium
COMPARATIVE EVALUATION OF RESISTANCE OF ASPARAGUS OFFICINALIS L. CULTIVARS AND BREEDING LINES TO FUSARIUM STEM AND CROWN ROT |
| Authors: | T. Sonoda, K. Tairako, A. Uragami |
| Keywords: | disease, seedling, inoculation, infested field, Fusarium proliferatum |
| Abstract:
Stem and crown rot is a major disease of asparagus caused by Fusarium proliferatum. The resistances of 5 cultivars and 11 breeding lines of Asparagus officinalis L. to stem and crown rot were evaluated. In a temperature-controlled greenhouse, 3-week-old seedlings were planted into F. proliferatum-inoculated pots. After 3 weeks, disease severity was scored among the cultivars and lines. The disease indices of ‘Gijnlim’ and ‘No.9708’ were significantly lower than those of the others. ‘No.9708’ is a hybrid between ‘UC157’ and ‘Gijnlim’ bred at the Fukushima Agricultural Experiment Station. Three-month-old seedlings of ‘Mary Washington 500 W’, ‘UC157’, ‘Gijnlim’, ‘No.9708’, and ‘No.9837’ were also planted in a field contaminated with F. proliferatum. After 8 months, disease severity in each cultivar and line was similar to the results of the greenhouse experiment. ‘Gijnlim’, ‘No.9837’, and ‘No.9708’ had low disease indices. ‘No.9837’ is a clone of selected plant from ‘Mary Washington 500 W’ for resistance to Phomopsis stem blight. | |
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