Varieties of Solanum tuberosum, subsp. andigena, as a source of resistance to common scab

1962 ◽  
Vol 2 (7) ◽  
pp. 242
Author(s):  
RJ Conroy ◽  
RJ Jessup

High resistance to potato scab of two varieties of the tetraploid Solanum tuberosum subspecies andigena has been demonstrated in a replicated trial at Spring Hill in the central tablelands of New South Wales. The use of scab resistant varieties of this subspecies in a breeding programme would present less difficulty than the use of diploid or triploid species.


Author(s):  
E. Punithalingam

Abstract A description is provided for Phacidiopycnis tl jberivora. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Solanum tuberosum, Alnus, Beta, Escallonia, Eucalyptus, Hoya, Humulus, Medicago, Olearia, Ribes, Syringa, Vaccinium and probably several other plants. DISEASE: Stem-end hard rot or progressive dry rot, or corky rot of potatoes (11, 671; Foster & Macleod, 1932). Symptoms are variable; on mature tubers lesions vary in size from pin heads to those involving the whole tuber. With the progress of infection lesions become sunken, circular with a well defined margin. When immature tubers become infected they become mummified (Foster & Macleod, 1932). GEOGRAPHICAL DISTRIBUTION: Asia (India); Australasia and Oceania (Australia, New South Wales, New Zealand); Europe (UK); North America (Canada, Alberta, Vancouver, British Columbia; USA, Washington). TRANSMISSION: No specific studies reported. Probably by conidia discharged during alternating dry and wet conditions; penetration of tubers through wounds and abrasions.





2009 ◽  
Author(s):  
F. Von Mueller


2009 ◽  
Author(s):  
Louisa Anne Meredith


2009 ◽  
Author(s):  
Roderick Flanagan




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