Mild strain protection as a means of reducing losses from the Queensland woodiness virus in the passion vine

Abstract

The need for a means of reducing loss from the woodiness disease of passion vine (Passiflora edulis Sims) is briefly stated and a practical attempt to achieve this object by making use of mild strain protection is described. In replicated trials in their second and third years, vines carrying a mild strain of the woodiness virus showed a marked superiority over those carrying a severe strain in number, weight and size of fruit free from woody symptoms.