1. Bud necrosis, a storage disease of tulips. I. Symptoms and the influence of storage conditions

   • W. J. De Munk
   • J. J. Beijer

   OriginalPaper Pages: 97 - 105

2. Electron microscopy of plant tissues infected with potato viruses A and S

   • J. A. De Bokx
   • H. A. J. I. Waterreus

   OriginalPaper Pages: 106 - 112

3. Control of black thread (Phytophthora palmivora) in hevea brasiliensis with Difolatan

   • J. Schreurs

   OriginalPaper Pages: 113 - 126

4. Saponaria vaccaria ‘Pink Beauty’, a new test plant for carnation mottle virus

   • F. A. Hakkaart
   • Marja van Olphen

   OriginalPaper Pages: 127 - 133

5. Comparison of cassava, yam and potato dextrose agars as fungal culture media

   • G. Weststeijn
   • N. Okafor

   OriginalPaper Pages: 134 - 139

6. Prunus serotina (American bird-cherry) as a host plant of Aphididae in the Netherlands

   • D. Hille ris Lambers

   Short communication Pages: 140 - 143

7. Book review

   • J. H. van Emden

   BookReview Pages: 144 - 144