1. The effect of breaking dormancy of potato tubers by Rindite or Gibberellic acid on the detection of potato virus A by ‘A6’-test leaves

   • J. A. De Bokx

   Articles Pages: 101 - 113

2. The sugar content of potato tubers grown with different rates of nitrogen application

   • E. Swiniarski
   • D. Ladenberger

   Articles Pages: 114 - 118

3. Symptomausbildung von Viren der Kartoffel-Y-Gruppe auf A6-Blättern

   • R. Bartels

   Articles Pages: 119 - 128

4. Resistance in wild species of potato to populations ofHeterodera rostochiensis Woll. from West Germany

   • M. G. Deshmukh
   • B. Weischer

   Articles Pages: 129 - 138

5. Photoperiodic control of synthesis of substances influencing tuber and root formation in the potato

   • A. N. Purohit

   Short Communications Pages: 139 - 141

6. The anthocyanin pigments of the tubers and sprouts ofTuberosum potatoes

   • H. W. Howard
   • H. Kukimura
   • E. T. Whitmore

   Short Communications Pages: 142 - 145

7. ‘Stolbur’ — A new potato disease in Israel

   • Sara Zimmerman-Gries

   Short Communications Pages: 146 - 150

8. Making chromosome counts inSolanum using corolla tissue

   • R. Kessel
   • G. E. Marks

   Short Communications Pages: 151 - 153

9. Dr. Hans Hänni †

   • E. R. Keller

   Association News Pages: 154 - 155

10. Section notices

    • E. Forsund

    Association News Pages: 156 - 158

11. Sprouting tendency of stored potatoes

    • H. Lindblom

    Articles Pages: 159 - 166