Date of this Version
Goss, R.W. (1930) The symptoms of spindle tuber and unmottled curly dwarf of the potato (Research Bulletin: Bulletin of the Agricultural Experiment Station of Nebraska No. 47)
The differentiation of the virus diseases of the potato on the basis of symptoms is an important but difficult phase of the virus problem. A knowledge of the variation in symptoms due to environmental factors is necessary both in investigational work and in the practical application of our knowledge to the control of these diseases in the field. A fairly comprehensive knowledge of the masking effect of certain environmental factors upon the symptoms of the mosaic group has been obtained through the work of various investigators. Considerably less information is available concerning the effect of environment upon the symptoms of spindle tuber and practically no information is available regarding unmottled curly dwarf. The present paper reports the results of these investigations, which were conducted entirely with the Bliss Triumph variety.