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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Potato research 33 (1990), S. 201-209 
    ISSN: 1871-4528
    Keywords: Early-dying ; wilt ; maturity ; resistance assessment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Twenty seven clones were trialled in the Negev, Israel, in both the Spring and Autumn planting seasons of 1984 and 1985 and of these clones 18 were also grown in the Spring of 1986. All clones were grown in fumigated soil (designated, Control) which was subsequently kept as disease-free as possible and in soil previously infested withVerticillium dahliae, the causal agent of Verticillium wilt and a component of the potato early-dying syndrome. The clones differed in maturity and showed a range of symptoms in the field. A true assessment of resistance or susceptibility could not be obtained unless allowance was made for the effects of maturity. Only a few clones showed significant resistance. The importance of the results, in relation to screening breeders' clones for resistance, is discussed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Potato research 33 (1990), S. 441-448 
    ISSN: 1871-4528
    Keywords: early dying ; field trials ; cultivars ; resistance ; Solanum tuberosum ; Alternaria solani Ell. & Mart.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Five methods of assessing early blight (Alternaria solani) on potatoes were examined using field trials in Israel in 1986 and 1987. One method (Mean Days) was unrepeatable and therefore unsatisfactory; four others were repeatable and discriminated between the 16 cultivars examined. However, when relationships with natural senescence were examined, two of the methods (Best Score and Mean Percent) were highly correlated with it. Of the two methods that reflected the rate of increase in disease symptoms, the maximum increase in percentage cover observed in a 14 day period (Delta) was found to be more effective than the linear regression coefficient for the relationship between percentage disease cover and number of days from planting (Slope).
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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