BIOLOGICAL CONTROL OF STRAWBERRY ROOT ROT THROUGH NON-PATHOGENIC ISOLATE OF RHIZOCTONIA FRAGARIAE HUSSAIN AND MCKEEN
The assay was carried out in a phytotronic room at 24C, 70% humidity and 12 h-photoperiod. The results were collected after 40 days; the root rot intensity was estimated (0–3). The plants of Treatment 1 were the most damaged (D.I. = 2.66). The plants of Treatment 2 were healthy (D.I. = 0.4). Treatment 3 plants resulted moderately infected (D.I. = 0.8). The protective activity of the non-pathogenic isolate RF94 versus the pathogenic isolate RF93 was largely shown. This result can be explained by root mycrorrization and a faster colonization by the non-pathogenic isolate.