1. Morphological characters considered as an indication of physiological age ofSolanum tuberosum plants cultivated in different ecological localities

   • Piera Scaramella Petri

   Articles Pages: 153 - 164

2. Potato stem-mottle disease in Scotland

   • C. H. Cadman

   Articles Pages: 165 - 175

3. Decapitation and genetic markers as related to haploidy inSolanum tuberosum

   • S. J. Peloquin
   • R. W. Hougas

   Articles Pages: 176 - 183

4. Population studies and successful control of the potato root eelworm

   • John Grainger

   Articles Pages: 184 - 198

5. Über Die Bestimmung des Krautziehoder Frührodetermins Durch Blattlauskontrollen

   • K. Neitzel
   • Chr. Pfeffer

   Articles Pages: 199 - 222

6. Reviews

   • C. Stfin

   BookReview Pages: 223 - 226

7. Notices of the council of the association

   European Association for Potato Research Pages: 226 - 228