1. A comparison of two pathosystems: Downy mildew on Spinacia oleracea and on Chenopodium album

   • H. D. Frinking
   • E. G. A. Linders

   OriginalPaper Pages: 97 - 106

2. Three-dimensional representation of downy mildew development in a spinach crop

   • H. D. Frinking
   • E. G. A. Linders

   OriginalPaper Pages: 107 - 113

3. Book review

   • C. P. de Jager

   BookReview Pages: 113 - 114

4. Relative humidity and wind velocity associated with diurnal rhythmicity of aerial dispersal ofPuccinia arachidis urediniospores

   • S. Savary

   OriginalPaper Pages: 115 - 125

5. Plant diseases: Infection, damage and loss

   • K. Verhoeff

   Book Review Pages: 126 - 126

6. Cereal aphid populations and the relation between mean density and spatial variance

   • S. A. Ward
   • R. J. Chambers
   • A. F. G. Dixon

   OriginalPaper Pages: 127 - 132

7. Publication received

   • C. P. de Jager

   Legacy Pages: 132 - 132

8. Identification of barley yellow mosaic virus by immuno-electron microscopy in barley but not in Polymyxa graminis or Lagena radicicola

   • Willem G. Langenberg
   • Derk Van Der Wal

   OriginalPaper Pages: 133 - 136