Beziehungen zwischen dem Wirkungsgrad antiphytoviraler Substanzen und dem Niveau der quantitativen Sortenresistenz sowie der Virulenz von Virusisolaten an Virus/Wirt‐Systemen der Kartoffel

Abstract

Relationship between the efficiency of antiphytoviral substances, the degree of quantitative resistance of cultivars, and the virulence of virus isolates on virus/host‐systems of potato. In vitro systematically infected with potato virus S, potato virus M or potato virus X stem cuttings of different potato varieties were treated with 2,4‐dioxohexahydro‐1,3,5‐triazine and Ribavirin. The reduction of virus replication by chemotherapy differed between varieties depending on their level of quantitative resistance and the virulence of virus isolates. An increasing resistance level of cultivars and a decreasing virulence of the virus isolates resulted in a relative enhancement of the inhibitory of the antiphytoviral substances.