The increase in flower cultivation in recent years has been reflecting the higher incidence of soil pathogens that can cause serious problems. This study aimed to evaluate the biological control of Fusarium wilt in gerbera with Trichoderma asperellum. The evaluated treatments were: T1) Control, only sterile substrate; T2) Substrate + Fusarium oxysporum; T3) Substrate + Fusarium oxysporum + Trichoderma asperellum; and T4) Substrate + Trichoderma asperellum. For this, the pathogen was isolated from gerbera with disease symptoms and, subsequently, it was identified according to morphological characters. Furthermore, the degree of antagonism of T. asperellum against F. oxysporum was evaluated through the culture pairing test. For greenhouse evaluations, commercial autoclaved substrate was used and infested with corn grains infected by the pathogen. Morphological identification confirmed the pathogen species as Fusarium oxysporum. In the culture pairing test, it was found that T. asperellum did not present a high degree of antagonism. The plants cultivated on substrate infested by the pathogen had no visible symptoms of wilt, but the substrate infestation with the pathogen provided lower values of fresh and dry mass of shoots and roots. The treatment with T. asperellum obtained higher values of fresh and dry mass of both shoots and roots, and also more vigorous inflorescences in relation to the plants treated with the pathogen
The objective of this study was to evaluate the pathogenicity of Fusarium graminearum on creole bean seeds, quantify the incidence of root lesions and damping off in seedlings, and evaluate the reduction of germination and seed vigor. Two varieties of creole beans, 'Cavalo' and 'Chumbinho', were collected from a family property located in the municipality of Severiano de Almeida, state of Rio Grande do Sul, Brazil. The treatments evaluated were: seeds not inoculated (T1) and inoculated (T2) with F. graminearum macroconidia suspension at a concentration of 8.0 x 10 5 macroconidia mL-1 , and the appearance of lesions and influence on vigor and germination were observed. The variety 'Cavalo' proved to be more susceptible to F. graminearum, expressing vigor reduction, incidence of root lesions and damping off. The variety 'Chumbinho' expressed no vigor reduction, although it has occurred reduced incidence of damping off. Regarding root lesions, the 'Chumbinho' variety compares to the variety 'Cavalo'.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.