1. Weed science — the need and the reality

   • Stephen O. Duke

   Guest editorial Pages: 183 - 186

2. The use of isozyme patterns to distinguish sweetpotato whitefly (Bemisia tabaci) biotypes

   • H. Y. Liu
   • S. Cohen
   • J. E. Duffus

   OriginalPaper Pages: 187 - 194

3. Effects of pesticide residues on ground-dwelling lycosid and micryphantid spiders in laboratory tests

   • F. Mansour
   • U. Heimbach
   • A. Wehling

   OriginalPaper Pages: 195 - 202

4. Screening of wildcucumis species against downy mildew (Pseudoperonospora cubensis) isolates from cucumbers

   • A. Lebeda

   OriginalPaper Pages: 203 - 210

5. Cropping systems for the management of phytonematodes

   • R. Rodríguez-kábana
   • Graciela H. Canullo

   Minireview Pages: 211 - 224

6. Abstracts of papers presented at the 13th congress of the Israeli phytopathological society

   • H. Schlesinger
   • Y. Ben-yephet
   • S. Ovadia

   Meeting Pages: 225 - 265

7. Obituary

   • I. S. Ben-Ze’ev
   • D. Nevo

   OriginalPaper Pages: 267 - 268

8. Obituary

   • A. Yawetz
   • A. S. Tahori

   OriginalPaper Pages: 269 - 271