Co-Authors:
Marco, S., Agricultural Research Organization, Institute of Plant Protection, The Volcani Center, Bet Dagan, 50 250, Israel
Abstract:
In field trials simulating commercial conditions, secondary PLRV infection of autumn-grown potato crops in Israel significantly reduced yield, although symptoms were not perceptible. Plots containing 7.3% PLRV-infected seed showed an increase in yield per plant of 17%, compared with plots with 36.2% infected seed; in plots with only 1.3% infected seed the increase of yield was 21%. In a second experiment, where individual plants were assayed, the yield of PLRV-infected plants of cv. Blanka was only 68.7% of that of PLRV-free plants; corresponding figures for cv. Up-to-Date and Désirée were 79.2 and 58% respectively. PLRV infection was not associated with reduced emergence or with the yield of deformed tubers. © 1984 Kluwer Academic Publishers.