Vitis 47 (4), 231–233 (2008) Reactions of some grape cultivars to Dematophora necatrix

White root rot of grape caused by Dematophora necatrix is prevalent in Jahrom and Mimand of Fars province, Iran. In a greenhouse tests 30 gr of colonized wheat kernels per 1,200 g soil amended with peat moss were used to inoculate rooted cuttings of 29 Vitis vinif-era and one hybrid cultivar in the pots. After 150 days most cuttings belonging to 27 V. vinifera cultivars and the hybrid died and were evaluated susceptible. How-ever, 9 seedlings from 'Bidaneh Sephid Gazvin ' and 3 from 'Bidaneh Ghermez Gazvin ' remained alive. Roots of these cuttings were totally free from mycelium and looked healthy. The seedlings were transplanted after root disinfection with benomyl, in soil near Zarghan Vineyard Collection for further studies. K e y w o r d s: Grape, resistance, white root rot, Rosellinia necatrix, Dematophora necatrix