RELATIVE SUSCEPTIBILITY OF SELECTED CULTIVARS OF POTATO TO PRATYLENCHUS-PENETRANS

  • 1 January 1976
    • journal article
    • research article
    • Vol. 8  (3) , 239-242
Abstract
P. penetrans suppressed the tuber yields of potato [Solanum tuberosum] cultivars ''Katahdin'', ''Kennebec'' and ''Superior'', but did not affect yields of ''Russet Burbank''. In comparison with noninfested controls, all initial nematode densities (Pi) of P. penetrans (Pi = 38, 81, 164, 211/100 cm3 of soil) suppressed yields of ''Superior''; a moderate Pi (81/100 cm3 soil) suppressed yields of ''Kennebec''; and on ''Katahdin'', a moderate Pi enhanced yields, but higher Pi''s caused a marked loss. In general, yields were related to the tolerance of the cultivars to nematode colonization. Highest nematode densities were found in the roots of ''Russet Burbank''; the next highest, in succeeding order, were found in roots of ''Kennebec'', ''Katahdin'' and ''Superior''. Symptoms of nematode invasion were confined to losses of tuber yield and root weight.

This publication has 0 references indexed in Scilit: