Trichoderma asperellum in the control of Fusarium sp., in genotypes of Passiflora

Abstract

The present investigation was carried out with the objective of evaluating Trichoderma asperellum in the control of Fusarium sp. in genotypes of Passifloras, to reduce the wilt in the neck of the stem in Santo Domingo. A Complete Randomized Design (CRD) was implemented for this purpose, with three treatments, T1: Passion fruit (Passiflora edulis f. flavicarpa), T2: Cholupa (Passiflora maliformis L.) and T3: Granadilla (Passiflora ligularis), evaluating the variables: mortality percentage %, tolerance to fusarium %, days to affectation (days), number of diseased plants per week (plt/wk), incubation period of the fungus (days), disease severity (%). The results show that the passion fruit genotype (T2) showed total tolerance to the disease (100%), that is, all passion fruit plants treated with T. asperellum resisted infection by Fusarium sp. The severity of the Passifloras genotypes treated with T. asperellum to control Fusarium sp. was significant (p<0.05), and at the end of the trial (week 6), severe wilt was observed in the Granadilla, while in the Maracuya a significant improvement was obtained, almost returning to the absence of symptoms, with respect to the Cholupa an improvement in symptoms was obtained, returning to moderate wilt. The genotype Granadilla (T1), presented the highest percentage of mortality, reaching 5%, followed by Cholupa (T3), with an intermediate percentage of mortality, around 3.33% and finally, Maracuya (T2), which did not register mortality in this treatment, therefore, the best treatment.