Efficiency of a yeast-based formulation for the biocontrol of postharvest anthracnose of papayas

Summa Phytopathologica

Jaqueline Rabelo De Lima²  Francisco Marto Pinto Viana¹  Francisco Aldiel Lima¹  Vanessa Pieniz¹  Luciana Rocha Barros Gonçalves¹ 

[1] ,Universidade Estadual do Ceará Faculdade de Educação de Crateús Crateús CE

关键词: Application vehicles;    Carnauba wax;    Gelatin;    Killer yeasts;    Colletotrichum gloeosporioides;    biological control;    Veículos de aplicação;    Cera-de-carnaúba;    Gelatina;    Leveduras killer;    Colletotrichum gloeosporioides;    controle biológico;   

DOI  :  10.1590/0100-5405/1963

来源: SciELO

【 摘 要 】

To identify formulations of biological agents that enable survival, stability and a good surface distribution of the antagonistic agent, studies that test different application vehicles are necessary. The efficiency of two killer yeasts, Wickerhamomyces anomalus (strain 422) and Meyerozyma guilliermondii (strain 443), associated with five different application vehicles, was assessed for the protection of postharvest papayas. In this study, after 90 days of incubation at 4ºC, W. anomalus (strain 422) and M. guilliermondii (strain 443) were viable with all application vehicles tested. Fruits treated with different formulations (yeasts + application vehicles) had a decreased severity of disease (by at least 30%) compared with untreated fruits. The treatment with W. anomalus (strain 422) + 2% starch lowered disease occurrence by 48.3%. The most efficient treatments using M. guilliermondii (strain 443) were those with 2% gelatin or 2% liquid carnauba wax, both of which reduced anthracnose by 50% in postharvest papayas. Electron micrographs of the surface tissues of the treated fruits showed that all application vehicles provided excellent adhesion of the yeast to the surface. Formulations based on starch (2%), gelatin (2%) and carnauba wax (2%) were the most efficient at controlling fungal diseases in postharvest papayas.

【 授权许可】

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