1. Editorial

   EditorialNotes Pages: 2 - 2

2. A hundred and more years of plant protection in the Netherlands

   • J. C. Zadoks

   OriginalPaper Pages: 3 - 24

3. Simulation of damage in winter wheat caused by the grain aphid Sitobion avenae. 2. Construction and evaluation of a simulation model

   • W. A. H. Rossing

   OriginalPaper Pages: 25 - 54

4. Modelling the escape of Chondrostereum purpureum spores from a larch forest with biological control of Prunus serotina

   • Meindert D. De Jong
   • Patricia S. Wagenmakers
   • J. Goudriaan

   OriginalPaper Pages: 55 - 61

5. Book Review

   • J. Vos
   • J. C. Zadoks

   BookReview Pages: 62 - 64