Testing the resistance of potato varieties to common scab
1980
Bjor, T. | Roer, L. (Agricultural Univ. of Norway, Aas (Norway). Dept. of Farm Crops)
Resistance to common scab was tested by growing potatoes in dry sand or soil in 3 l pots placed on irrigated subsoil. Inoculated coarse sand (0.5-0.005 Petri dish culture of Streptomyces scabies per pot) proved more reliable than naturally infested soil. The incidence of scab on the seed tubers did not significantly affect the results. Tests in the greenhouse were most reliable, although those in open air also often gave satisfactory results. For screening purposes satisfactory results can be obtained by using only two or three pots per variety. Thirty-six tyrosinase positive isolates of Streptomyces from potato and carrot from different parts of Norway were tested on four potato varieties and some of the isolates were tested on carrot. Large differences in aggressiveness were found, but no difference in virulence could be demonstrated, i.e. the same varieties were the most resistant to all isolates
Show more [+] Less [-]Bibliographic information
This bibliographic record has been provided by European Union
