Ação do fusarium oxysporum F. sp. Passiflorae no crescimento inicial das mudas de maracujazeiro inoculadas com microrganismos promotores de crescimento

Abstract

Passion fruit is affected by fusariosis which results in economic damage. Thus, control measures to inhibit the growth of phytopathogen Fusarium oxysporum f. sp. passiflorae (Fop), fungus causative of that disease are necessary. Inoculation with microorganisms can make passion fruit plants more resistant to fusariosis. In view of this, the objective was to evaluate the impact of Fop on the initial growth of passion fruit seedlings inoculated with growth-promoting microorganisms. Two successive trials were conducted in a greenhouse at Embrapa Cassava and Fruit growing, Cruz das Almas-BA, Brazil, being arranged in an experimental design completely randomized, with six treatments and five replications. The treatments were: T1- inoculation with Bacillus sp. with Fop; T2- inoculation with Trichoderma asperellum with Fop; T3- inoculation with the UFRB FA72A2-1 bacterial isolate with Fop; T4- inoculation with UFRB FA34C2-2 bacterial isolate with Fop; T5- Control absolute without none type in inoculation; T6- Control inoculated only with O Fop. After 123 days after sowing, the following variables were measured: height, diameter of stem, number of leaves, root dry matter, shoot dry matter, dry matter total It is Index in Quality in Dickson. The UFRB FA72A2-1 isolate does not exert a beneficial effect on shoot and total dry matter, root dry matter and quality of passion fruit seedlings pre and post infected by Fusarium oxysporum f. sp. passiflorae. Trichoderma has an effect on the total dry matter of passion fruit seedlings pre-infected by Fusarium oxysporum f. sp. passiflorae. The bacterial isolates Bacillus sp and UFRB FA34C2-2 induced higher production of shoot and total dry matter and root dry matter and quality of passion fruit seedlings pre and post infected by Fusarium oxysporum f. sp. passiflorae , being indicated for further studies.