The reactions of 146 potato varieties to graft infection with viruses X, A, B and C are recorded, on the basis of their top‐necrotic or non‐necrotic symptoms. Evidence is given that the viruses B and C used in this work were uncontaminated with other viruses. Reference is made to the effects of varietal reaction on virus distribution.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.