1. Further observations on variation of lettuce mosaic virus in relation to lettuce (Lactuca sativa), and a discussion of resistance terminology

   • L. Bos
   • N. Huijberts
   • C. Cuperus

   OriginalPaper Pages: 293 - 314

2. Control of infection and sporulation ofBotrytis cinerea on bean and tomato by saprophytic bacteria and fungi

   • Y. Elead
   • J. Köhl
   • N. J. Fokkema

   OriginalPaper Pages: 315 - 336

3. Plant growth enhancement and disease control byTrichoderma harzianum in vegetable seedlings grown under commercial conditions

   • J. Inbar
   • M. Abramsky
   • I. Chet

   OriginalPaper Pages: 337 - 346

4. Characteristics of a resistance-breaking isolate of potato virus Y causing potato tuber necrotic ringspot disease

   • J. F. J. M. van den Heuvel
   • R. A. A. van der Vlugt
   • H. Huttinga

   OriginalPaper Pages: 347 - 356

5. Book review

   • George Salmond

   BookReview Pages: 357 - 358