Factors affecting the translocation of potato viruses X and Y

Abstract

Studies were made on the effect of various factors in relation to the translocation of Potato viruses X and Y sap inoculation in three potato varieties. Kufri Chandramukhi proved best followed by Kufri Jyoti and Kufri Sindhuri. Movement of both viruses was greater in summer than in the autumn crop. Well developed young leaves proved superior than immature young leaves while elder leaves were found to be inferior. New shoots of plants were found to be better than the Normal plant stems (75 days old plants). Strains PVX₁ and PVY₆ translocated faster than strains PVX₂, PVX₃ and PVY₃, PVY₄. A combined infection of PVX and PVY stimulated the translocation of PVX while a combination of PVX with PVS reduced it. In case of PVY₉ combined infection either with PVX or with PVS had no effect.