Reação de cultivares de maracujazeiro em áreas com fusariose

Abstract

The aim of this study was to evaluate the survival of eight cultivars of P. edulis Sims. and the reaction of yellow passion fruit grafted on Passiflora foetida L. in an area with history of fusariosis (Fusarium oxysporum f. sp. passiflorae) in the region of Mossoró/RN. Two assays were conducted, in which eight passion fruit cultivars (FB 200, FB 300, BRS Gigante Amarelo, BRS Sol do Cerrado, BRS Rubi do Cerrado, IAC 273, IAC 275 and IAC 277) were planted and a commercial cultivar ‘yellow round’ by Topssed® was grafted on P. foetida in an area naturally infested with F. oxysporum f. sp. passiflorae. Experimental design was in randomized blocks with four replicates and three plants per plot. In Assay I the survival of cultivars was evaluated and in Assay II the incidence of fusariosis and the reaction class were evaluated, identifying treatments as resistant, moderately susceptible and susceptible. All cultivars (Assay I) showed low survival rates at 180 days after planting. Non-grafted cultivars (Assay II) were classified as susceptible, and fusariosis incidence ranged from 22.22 to 91.67%. There was no record of fusariosis incidence in passion fruit grafted on P. foetida (Assay II) during the evaluation period, which showed to be a promising rootstock for soils infested with Fusarium oxysporum.