Situación actual de Colletotrichums spp. en México: Taxonomía, caracterización, patogénesis y control

Rojo-Báez, Indira; Álvarez-Rodríguez, Brando; García‐Estrada, Raymundo Saúl; León‐Félix, Josefina; Sañudo‐Barajas, J. Adriana; Allende-Molar, Raúl

doi:10.18781/r.mex.fit.1703-9

Cited by 14 publications

(18 citation statements)

References 27 publications

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“…The occurrence of anthracnose not only influences yields, but also affects the quality of the crops. In some cases, the incidence of anthracnose on the fruits has been as high as 100% for pepper, and ranges between 20% and 60% for papaya and physic nut (Rojo‐Báez et al ., ). Annual yield losses can reach 40–80% under favourable conditions, and consequently losses at the pre‐ and post‐harvest stage are considerable.…”

Section: Introductionmentioning

confidence: 97%

Characterization of Colletotrichum truncatum from papaya, pepper and physic nut based on phylogeny, morphology and pathogenicity

et al. 2017

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Colletotrichum truncatum (syn. C. capsici) has been identified as the causal agent of anthracnose on various hosts, predominantly pepper (Capsicum spp.) plants. The aim of this study was to determine whether C. truncatum isolates infecting papaya, pepper and physic nut in southeastern Mexico are morphologically, genetically and pathogenically different, in order to improve disease management strategies. A total of 113 C. truncatum isolates collected from five producer states were subjected to phenotypic characterization and divided into six different morphological groups. These morphological traits and the location of the isolates were used to select a subset of 20 isolates for further studies. Differences in the pathogenicity of the isolates were tested with a cross‐inoculation assay using pepper, papaya and physic nut. The pathogenicity tests revealed that all isolates could infect the three hosts and produce typical anthracnose symptoms, indicating a lack of host specificity for this species and therefore its pathogenic potential on other plants. Phylogenetic analysis using internal transcribed spacer (ITS) and glyceraldehyde 3‐phosphate dehydrogenase (GAPDH) sequences of the C. truncatum isolates from this study and reference strains was performed, grouping the isolates into a monophyletic clade. This study reports for the first time the characterization of C. truncatum causing anthracnose disease on three different hosts in Mexico.

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Section: Introductionmentioning

confidence: 97%

Characterization of Colletotrichum truncatum from papaya, pepper and physic nut based on phylogeny, morphology and pathogenicity

et al. 2017

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“…There is evidence of a prolonged effect during the greenhouse test of antifungal activity, in which a MIC was identified corresponding to a concentration of 255 µL in 30 capsules and an inhibitory range of 100% for the development of anthracnose by Colletotrichum gloeosporioides during the 12 days after inoculation. Other studies have reported the appearance of the first symptoms of infection up to 51 days after inoculation [ 20 ]. The capsules have demonstrated their extended effect in controlling the release of the remaining inoculum.…”

Section: Discussionmentioning

confidence: 99%

Effectiveness of Cymbopogon citratus Oil Encapsulated in Chitosan on Colletotrichum gloeosporioides Isolated from Capsicum annuum

2020

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One of the principal etiological agents associated with losses in horticultural crops is the fungus Colletotrichum sp. This study aimed to evaluate the in vitro effectiveness of the essential oil (EO) from Cymbopogon citratus in chitosan supports for the control of Colletotrichum gloeosporioides isolated from sweet pepper plants. Methods: The extraction and phytochemical analysis of the EO of C. citratus were performed along with its encapsulation in chitosan-agar in order to compare it with other techniques and determine its effect on C. gloeosporioides. Results: The EO from the citral chemotype (58%) encapsulated in the chitosan-agar, with an 83% encapsulation efficiency in mass percentage, resulted in the total inhibition of mycelial growth at a minimum inhibitory concentration of 1370 ppm. This concentration was effective in controlling the disease under greenhouse conditions. The effectivity of the capsules containing EO was superior to that of other controls using EO evaluated in vitro. The capsules demonstrated an effective period of 51 days, with an additional 30 days of effectiveness after a reinfection cycle, thus providing similar results to the control with Trichoderma sp. Conclusions: Chitosan capsules present a promising strategy in the use of C. citratus EO on C. gloeosporioides, and they are highly effective and stable under in vitro and field conditions

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“…Los resultados obtenidos coinciden con los trabajos anteriores de Rojo-Baez et al (2017a) y Rojo-Báez et al (2016) quienes en frutos de papaya inoculadas con C. truncatum observaron los primeros sintomas a los tres (ddi) y los acérvulos a los 5 ddi; y en arveja a los 4 ddi. Asimismo, Rojo-Báez et al (2017b) reportan que C. gloeosporioides y C. truncatum poseen amplio rango de hospedantes y que su colonización es intramural subcuticular e intracelular. Estos resultados nos muestran que debemos de implementar diferentes estrategias de manejo de la enfermedad.…”

Section: Prueba De Patogenicidadunclassified

Causal agent of anthracnose in the pea crop (Pisum sativumL.) in northern of Perú: Symptomatology, isolation and identification, pathogenicity and control

Aguilar

Rafael-Rutte²,

Martínez-Santos

et al. 2021

Sci. agropecu

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Pea (Pisum sativum L.) is an economically important crop and of great demand in the national and international market, due to the considerable number of families that depend on its cultivation, especially in the northern and central highlands of Peru. However, the anthracnose is one of the limiting factors for low productive and causes economic losses. The aim of this study was to describe the symptoms, culturally and morphometrically identify the causal agent and to evaluate under in vitro the efficacy of fungicides. Isolation was made from samples of leaves and pods with anthracnose symptoms collected in the crop field. Healthy pea was used in the pathogenicity test, and discs of PDA medium containing isolated fungi were inoculated into them. The poisoned food technique was used, and colony growths were measured to evaluate the effects of fungicides. The results based on the symptoms, morphological and cultural characteristics described, the isolates were identified as Colletotrichum lindemuthianum, C. truncatum y Ascochyta pisi, which was confirmed with Koch's postulates. Trifloxystrobin+tebuconazole was found to be the most effective fungicide followed by tebuconazole, procloraz and mancozeb completely inhibited mycelial growth (100%) of identified fungi. These results are useful for the control of Colletotrichum lindemuthianum, C. truncatum y Ascochyta pisi in the pea crop.

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Situación actual de Colletotrichums spp. en México: Taxonomía, caracterización, patogénesis y control

Abstract: Resumen. Las especies del género

Cited by 14 publications

References 27 publications

Characterization of Colletotrichum truncatum from papaya, pepper and physic nut based on phylogeny, morphology and pathogenicity

Characterization of Colletotrichum truncatum from papaya, pepper and physic nut based on phylogeny, morphology and pathogenicity

Effectiveness of Cymbopogon citratus Oil Encapsulated in Chitosan on Colletotrichum gloeosporioides Isolated from Capsicum annuum

Causal agent of anthracnose in the pea crop (Pisum sativumL.) in northern of Perú: Symptomatology, isolation and identification, pathogenicity and control

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