scholarly journals Morfologia, patogenicidade e sensibilidade à fungicidas de isolados de Colletotrichum truncatum (Schw.) Andrus & WD Moore

2021 ◽  
Author(s):  
Gesiane Guimarães
Keyword(s):  
Colletotrichum Truncatum

PLANT-SEED TRANSMISSION OF SOYBEAN IN Colletotrichum truncatum

Nucleus ◽  
2015 ◽  
Vol 12 (1) ◽  
Author(s):  
Gabrielle de Lima MASSON ◽  
Bruno Agostini COLMAN ◽  
Paulo Rogério Beltramin da FONSECA ◽  
Alexandre Dinnys ROESE
Keyword(s):  
Seed Transmission ◽  
Colletotrichum Truncatum ◽  
Plant Seed

scholarly journals First Report of Colletotrichum truncatum Causing Stem Cankers on Jatropha curcas in Burkina Faso

Plant Disease ◽  
2015 ◽  
Vol 99 (1) ◽  
pp. 14-20 ◽  
Author(s):  
C. A. Ellison ◽  
A. Sawadogo ◽  
S. Braman ◽  
S. Nacro
Keyword(s):  
Burkina Faso ◽  
Jatropha Curcas ◽  
Management Practices ◽  
Fruit Production ◽  
Multiple Infections ◽  
Colletotrichum Truncatum ◽  
Yield Losses ◽  
Disease Symptoms ◽  
Stem Lesions ◽  
Stem Cankers

A new disease was identified on the biofuel crop Jatropha curcas in 2012 in Burkina Faso that is causing serious yield losses. The disease was found to be widespread in both Sissili and Comoé Provinces. It causes characteristic leaf lesions, fruit necrosis, and cankers on young stems and branches. There was evidence of multiple infections on plants over the growing season, with regrowth evident from below old cankers, but there was little fruit production from infected branches. A detailed monitoring and assessment was undertaken of the disease progress in a severely infected field, over a 7-week period. The disease symptoms progressed from chlorosis through a necrotic phase and, in approximately 83% of replicates, stem cankers developed that resulted in dieback and lodging of branches. Colletotrichum truncatum and a member of the species complex C. gloeosporioides sensu lato were consistently isolated from fresh stem samples showing early symptoms (chlorosis). Koch's postulates were undertaken, to establish the pathogenicity of the two species. No symptoms were observed on plants inoculated with C. gloeosporioides; however, leaf and stem lesions developed after inoculation with C. truncatum, which was reisolated from the diseased tissue, confirming it as the disease-causing agent. Preliminary management practices for the disease are proposed.

scholarly journals Reação de subamostras de feijão-fava à antracnose

2012 ◽  
Vol 38 (4) ◽  
pp. 329-333 ◽  
Author(s):  
Gerusa Rodrigues dos Santos Cavalcante ◽  
Eulália Maria Sousa Carvalho ◽  
Regina Lucia Ferreira Gomes ◽  
Ananda Rosa Beserra Santos ◽  
Cleidiane Maria Pereira Marques Santos
Keyword(s):  
Colletotrichum Truncatum

O feijão-fava, segunda espécie mais cultivada do gênero Phaseolus, apesar de demonstrar grande adaptação às condições edafoclimáticas na região Nordeste do Brasil, apresenta baixo rendimento devido, entre outros fatores, à ocorrência de doenças como a antracnose, causada pelo fungo Colletotrichum truncatum. Nesse sentido, objetivou-se avaliar a reação de 30 subamostras de feijão-fava à antracnose. Para tanto, foram utilizadas folhas destacadas inoculadas com C. truncatum. A severidade da doença foi estimada por meio de escala de notas e as subamostras agrupadas em cinco classes de acordo com a resistência. O delineamento utilizado foi o inteiramente casualizado com quatro repetições. Em folhas destacadas, a maioria das subamostras de feijão-fava apresentou baixo nível de resistência à antracnose. As subamostras UFPI 251 e UFPI 673 comportaram-se como altamente resistentes aos cinco e sete dias após a inoculação sendo, portanto, promissoras para utilização em programas de melhoramento da cultura.

scholarly journals Use of seed treatment with fungicide in control of colletotrichum truncatum and physiological quality of soybean seeds glycine max

2013 ◽  
Vol 4 (2) ◽  
pp. 98-106
Author(s):  
Vinícius Almeida Oliveira ◽  
Lorenxo Paradiso Martins ◽  
Rogério Cavalcante Gonçalves ◽  
Luíz Paulo Figueredo Benício ◽  
Daniella Lima da Costa ◽  
...  
Keyword(s):  
Glycine Max ◽  
Seed Treatment ◽  
Pathogenic Fungus ◽  
Dry Weight ◽  
Soybean Seeds ◽  
Colletotrichum Truncatum ◽  
Fresh Weight ◽  
Crop Development ◽  
Physiological Quality

The fungus are the main microorganisms present in seeds, is the main cause of deterioration and loss in production. The anthracnose caused by C. truncatum associated with soybean seeds as has main vehicle for introduction into the planting areas can be detected in all stages of crop development, from the cotyledons to the end of the cycle, being present in the stems, veins, leaflets and pods. Thus aimed to evaluate the influence of using different products fungicides as seed treatment, where the seeds were inoculated with the pathogenic fungus and treated with the chemicals They take Carbedazim + Fludioxonil + metalaxyl-M and carboxin + thiram. For each fungicide product was two tramentos done using the doses recommended by the manufacturer and 75% of dose. We evaluated health, germination and promote plant (Plant growth, fresh weight and dry weight of root and shoot). This work concludes that the use of fungicide controls significantly seeds infected with C. truncatum and presents a significant improvement as the development of structures seedling.

scholarly journals Uji Antagonisme Kapang Endofit Tanaman Galam (Melaleuca cajuputi) terhadap Colletotrichum truncatum

2019 ◽  
Vol 3 (2) ◽  
pp. 59
Author(s):  
Nurul Huda ◽  
Witiyasti Imaningsih ◽  
Safinah Surya Hakim
Keyword(s):  
Colletotrichum Truncatum ◽  
Melaleuca Cajuputi

Galam (Melaleuca cajuputi) adalah spesies asli dari lahan gambut yang secara alami hidup berasosiasi dengan kapang endofit. Kapang endofit dikenal karena kemampuannya sebagai biofungisida. Penelitian ini bertujuan untuk mengetahui kemampuan kapang endofit yang diisolasi dari pohon Galam untuk menghambat pertumbuhan kapang pathogen Colletotrichum truncatum (Schwein.) Andrus & W.D. Moore dan menganalisis mekanisme penghambatannya. Tahapan penelitian ini meliputi (a) isolasi kapang endofit; (b) seleksi kapang endofit; (c) uji patogenisitas dan antagonis kapang endofit; (d) uji kemampuan metabolit volatil dan non-volatil dan (e) uji mikoparasitisme. Hasil penelitian menunjukkan persentase penghambatan tertinggi pada uji antagonisme secara in-vitro dalam menghambat C. truncatum ditunjukkan oleh isolat Neurospora sp. DG 27 dengan rata-rata persentase hambatan sebesar 71,98%, diikuti oleh isolat Neurospora sp. DG 17, 53,74% dan isolat Syncephalastrum sp. AG 15, 48,28%. Uji kemampuan metabolit volatil dan non-volatil isolat Neurospora sp. DG 27 menunjukkan persentase penghambatan tertinggi terhadap kapang C. truncatum. Mekanisme penghambatan isolat Neurospora sp. DG 27 terjadi secara antibiosis sehingga terbentuk zona bening, sedangkan isolat DG 17 terjadi secara kompetisi dan isolat Syncephalastrum sp. AG 15 secara mikoparasit.

scholarly journals First Report of Anthracnose Caused by Colletotrichum truncatum on Basella alba in China

Plant Disease ◽  
2018 ◽  
Vol 102 (9) ◽  
pp. 1853-1853
Author(s):  
X. X. Yang ◽  
Y. Liu ◽  
L. Zhang ◽  
X. Q. Huang ◽  
W. X. Wu ◽  
...  
Keyword(s):  
Colletotrichum Truncatum ◽  
First Report ◽  
Basella Alba

scholarly journals EXPRESIÓN GÉNICA DURANTE EL PROCESO DE INFECCIÓN DE Colletotrichum truncatum (SCHWEIN.) EN PAPAYA MARADOL

2021 ◽  
Vol 44 (2) ◽  
pp. 221
Author(s):  
Indira Rojo-Báez ◽  
Raymundo S. García-Estrada ◽  
Josefina León-Félix ◽  
J. Adriana Sañudo-Barajas ◽  
Raúl Allende-Molar
Keyword(s):  
Carica Papaya ◽  
Colletotrichum Truncatum ◽  
Expresión Génica

Colletotrichum truncatum (Schwein.) es uno de los hongos patógenos causantes de antracnosis en papaya (Carica papaya L.). El objetivo de este estudio fue determinar los cambios en la expresión de genes relacionados con la patogenicidad de C. truncatum en su interacción con hojas de papaya Maradol. Las esporas del hongo se inocularon en hojas escindidas; se analizaron muestras de tejidos inoculados al inicio (0 h) y a las 2, 6, 16, 20, 24, 48, 60, 72, 96 y 120 h después de inoculación (hdi). Se determinó la expresión relativa de los genes quitina sintasa (CHS1), β-1-3 glucano sintasa (GLS1) y cutinasa (CUT1) respecto al tiempo. El gen CHS1 se expresó de manera permanente y alcanzó su máximo nivel de expresión a partir de las 2 hdi; el perfil de expresión del gen GLS1 coincidió con el de CHS1 al inicio de la infección, pero al final de la misma (120 hdi) la expresión de GLS1 volvió a aumentar significativamente. La expresión del gen CUT1 se consideró tardía porque el máximo se alcanzó a las 120 hdi. Estos genes se relacionan con la producción de estructuras de infección y desarrollo del patógeno en hojas de papaya Maradol durante la infección. Los resultado sugieren que la síntesis de quitina y β-1-3 glucanos se asocia con la etapa de producción de estructuras de infección (apresorios, hifas de infección, conidios y acérvulos) y que la función de la cutinasa es posterior, posiblemente durante la lisis de la cutícula del hospedante.

scholarly journals In Vitro Evaluation of Fungicides, Botanicals and Bioagents against Colletotrichum truncatum

2020 ◽  
Vol 9 (7) ◽  
pp. 551-556
Author(s):  
B. Shashikumara ◽  
B. Rajeswari ◽  
G. Uma Devi ◽  
G. Sridevi ◽  
Somashekhar Konda
Keyword(s):  
Colletotrichum Truncatum ◽  
In Vitro Evaluation

scholarly journals First Report of Colletotrichum truncatum on Alfalfa in Turkey

Plant Disease ◽  
2000 ◽  
Vol 84 (1) ◽  
pp. 100-100 ◽  
Author(s):  
C. Eken ◽  
E. Demirci
Keyword(s):  
Morphological Characteristics ◽  
Conidial Suspension ◽  
Colletotrichum Truncatum ◽  
First Report ◽  
Clear Area ◽  
Granular Cytoplasm ◽  
Symptomatic Tissue ◽  
Medicago Sativa L ◽  
Stem Lesions ◽  
And Control

During the summer of 1997 and 1998, a pathogen identified as Colletotrichum truncatum (Schwein.) Andrus & W.D. Moore was isolated from lesions on stems of alfalfa (Medicago sativa L.) plants in Erzurum, Turkey. Typical symptoms on stems of mature plants were large, sunken, irregularly shaped black lesions. Twenty-eight cultures of C. truncatum were isolated from stem lesions. Acervuli containing spores and dark setae were observed within lesions. Conidia were hyaline, one-celled, falcate to nearly straight with a prominent clear area in the center of highly granular cytoplasm, and measured 16.3 to 20.6 × 3.1 to 4.5 μm. These morphological characteristics were consistent with the description of C. truncatum (1). The pathogenicity of two isolates was determined on alfalfa cv. Bilensoy. Alfalfa seedlings (6-week-old) were inoculated with a conidial suspension of the fungus (1.4 × 107 conidia per ml), incubated in a moist chamber for 3 days, and subsequently transferred to growth chambers maintained at 25°C with a 12-h photoperiod. Ten plants were inoculated with each isolate. Symptoms first appeared on stems 12 days after inoculation. Sunken, irregularly shaped black lesions occasionally girdled stems of plants inoculated with C. truncatum. Symptoms did not appear on stems of control plants inoculated with sterile distilled water. C. truncatum was reisolated from symptomatic tissue. This is the first report of C. truncatum on alfalfa from Turkey. Reference: (1) B. C. Sutton. 1992. Pages 1–27 in: Colletotrichum Biology, Pathology and Control. J. A. Bailey and M. J. Jeger, eds. CAB International, Wallingford, U.K.

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