Epidemiología de enfermedades fúngicas de postcosecha en frutos de Papaya

Silva, C.F.B.; Michereff, Sami Jorge; Albuquerque, Henrique Soares de; Silva, J.A.; Oliveira, Sônia Maria Alves de; Dantas, Suzana Alencar Freire

doi:10.22370/bolmicol.2002.17.0.432

Cited by 2 publications

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“…Entre sus requerimientos, destacan valores elevados de humedad relativa; por lo que es común exceder los límites fisiológicos de la planta, ya sea por una ineficiente administración del riego o la ventilación, el uso de materiales inadecuados o por el hacinamiento de las mismas plantas (Huertas 2008). El exceso de humedad también favorece el establecimiento de condiciones ambientales que, en conjunto con otros componentes, desencadenan la presencia de enfermedades (Silva et al 2002).…”

Section: Introductionunclassified

In vitro antifungal effect of endophytic fungi of creole cucurbits of Yucatan

Montañez-De Azcué,

Cristóbal-Alejo,

Uc-Várguez

et al. 2024

Ecosist. Recur. Agropec.

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Endophytic fungi are plant symbiont microorganisms, diverse and abundant in tropical regions, with great potential as biocontrol agents of agricultural fungal diseases. The objective of the present work was to evaluate in vitro antifunfal activity of endophytic fungi associated with creole cultivars of Cucumis sativus and Lagenaria siceraria from Yucatán. The endophytic strains were isolated and identified from different organs, to be subjected to dual confrontations and antibiotic tests. Twenty species with antifungal effects against Corynespora cassiicola, Colletotrichum truncatum and Fusarium equiseti were identified, obtaining inhibition ranges of 17.72–100%, 16.51–91.55% and 4.64–91.89%, respectively. Aspergillus flavus, Lasiodiplodia pseudotheobromae and Trichoderma longibrachiatum exhibited the highest percentages of inhibition against the three phytopathogens. Likewise, these three species of endophytes demonstrated an antibiotic effect in their extracts, mainly inhibiting the growth of F. equiseti by up to 46.46%. The L. pseudotheobromae strain has characteristics that give it potential as an antifungal agent, so its applications and growth conditions should continue to be explored. This work represents a first effort to understand the diversity of endophytic fungi in native crops in the region.

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Section: Introductionunclassified

In vitro antifungal effect of endophytic fungi of creole cucurbits of Yucatan

Montañez-De Azcué,

Cristóbal-Alejo,

Uc-Várguez

et al. 2024

Ecosist. Recur. Agropec.

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Predictive Model for the Effect of Environmental Conditions on the Postharvest Development of Colletotrichum gloeosporioides Strains Isolated from Papaya (Carica papaya L.)

Sandoval-Contreras

Iñiguez‐Moreno

Garrido-Sánchez

et al. 2020

Journal of Food Protection

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Colletotrichum species are the most important postharvest spoilage of papaya fruit. The objective of this research was to evaluate the effect of temperature and relative humidity on growth rate and time for growth to become visible of five strains of Colletotrichum gloeosporioides isolated from papaya fruit in a complex medium. As a primary model, the radial growth rates were estimated using the Baranyi and Roberts model in papaya agar. The Solver Excel function was used to obtain the time for visible mycelium (tv). Secondary models obtained with the Rosso’s cardinal model with inflection were applied to describe the effect of temperature on radial growth rate (µ, mm/d). The Arrhenius-Davey model was used to model tv. The obtained models seem to be satisfactory for describing the µ and time tv. The relative humidity (RH) had influence on µ and time tv for all tested C. gloeosporioides isolates, but no model is able to describe the behavior of the fungus. External validation of models on papaya fruit was performed. Growth models were developed with the same models used in vitro. The bias (Bf) and the accuracy factors (Af), as indices for performance evaluation of predictive models in food microbiology, as a function of temperature and RH, were 1.22 and 1.33 for growth rate, and 1.18 and 1.62 for time for visible mycelium respectively indicating good predictions. The supply chain of papaya is complex and require constant conditions and mismatches in can cause damage to fruit. Knowledge of the behavior of C. gloeosporioides on papaya fruit and application of the developed models at the supply chain level will help to establish transport control strategies against these molds. This research has contributed to the first models of growth for C. gloeosporioides in Mexico.

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Epidemiología de enfermedades fúngicas de postcosecha en frutos de Papaya

Cited by 2 publications

References 0 publications

In vitro antifungal effect of endophytic fungi of creole cucurbits of Yucatan

In vitro antifungal effect of endophytic fungi of creole cucurbits of Yucatan

Predictive Model for the Effect of Environmental Conditions on the Postharvest Development of Colletotrichum gloeosporioides Strains Isolated from Papaya (Carica papaya L.)

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