Lisker, N., Dept. Plant Pathol. Microbiol., Hebrew Univ. Jerusalem, Israel
Katan, J., Dept. Plant Pathol. Microbiol., Hebrew Univ. Jerusalem, Israel
Chet, I., Dept. Plant Pathol. Microbiol., Hebrew Univ. Jerusalem, Israel
Henis, Y., Dept. Plant Pathol. Microbiol., Hebrew Univ. Jerusalem, Israel