1. Reasons for the delay in development of biological control of foliar pathogens

   • Y. Elad

   Guest Editorial Pages: 99 - 105

2. Phagostimulants enhancing the efficacy ofBacillus Thuringiensis formulations against the Giant Looper,Boarmia (Ascotis) Selenaria, in avocado

   • J. Meisner
   • D. Hadar
   • I. Harpaz

   Research Paper Pages: 107 - 115

3. Effects of gamma radiation on the immature stages ofLiriomyza Trifolii

   • Shoshana Yathom
   • R. Padova
   • I. Ross

   Research Paper Pages: 117 - 124

4. Penetration of the nonconventional acaricide JH 388 into arthropod eggs

   • F. Reggiori
   • V. Caprioli
   • C. Valcamonica

   Research Paper Pages: 125 - 133

5. Species presence and density of tetranychid and phytoseiid mites in unsprayed and sprayed apple orchards in Northern Israel

   • Fadel Mansour

   Research Paper Pages: 135 - 141

6. Overwintering of alternaria macrospora in Cotton Debris

   • J. Rotem

   Research Paper Pages: 143 - 152

7. Residues of cypermethrin, fenvalerate and deltamethrin on cauliflower

   • Parm Pal Singh
   • Balwinder Singh
   • Raminderjit Singh Battu

   Research Paper Pages: 153 - 158

8. Joint action of fungicides in Mixtures: Theory and practice

   • Y. Cohen
   • Y. Levy

   Review Pages: 159 - 169

9. A boll rot of cotton caused by Corynespora Cassiicola in Tamil Nadu, India

   • P. Lakshmanan
   • R. Jeyarajan
   • P. Vidhyasekaran

   Note Pages: 171 - 173

10. In memoriam

    • Michael D. Greenfield
    • Meir Paul Pener

    Obituary Pages: 175 - 176

11. In memoriam

    • Ruth Marcus

    Obituary Pages: 177 - 180