Efeito da temperatura no crescimento micelial, produção e germinação de conídios de Colletotrichum spp. isolados de Coffea arabica L

Dias, Moab Diany; Pozza, Edson Ampélio; Abreu, Márvio Lobão Teixeira de; Miranda, Edin Orosco

doi:10.1590/s1413-70542005000300006

Cited by 15 publications

(14 citation statements)

References 9 publications

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“…A avaliação do experimento iniciou às 24h após sua instalação, realizando-se medições ortogonais do diâmetro das colônias diariamente, sendo que cada medição correspondeu à média de duas medidas diametralmente opostas da colônia fúngica, tendo como referência as placas testemunhas. Os dados obtidos nessa avaliação foram utilizados para calcular o Índice de Velocidade de Crescimento Micelial (IVCM), conforme a fórmula utilizada por Dias et al (2005).…”

Section: Methodsunclassified

EFEITO DA TEMPERATURA E EXTRATOS DE PLANTAS NO CONTROLE DA ANTRACNOSE DO FRUTO DA BANANEIRA (Musa sp.) CAUSADA POR Colletotrichum musae

Oliveira¹,

Oliveira²,

Ferreira³

et al. 2018

Enci Bio

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RESUMO Colletotrichum musae causa grandes prejuízos na cultura da banana, e por este motivo é considerado um importante agente fitopatogênico. Nesse sentido, o objetivo com este trabalho foi avaliar os efeitos da temperatura e de extratos vegetais de Citrus aurantifolia Swingle, Citrus latifolia Tanaka e Allium sativum sobre o crescimento micelial de C. musae. No efeito da temperatura foram avaliadas as temperaturas de 15, 20, 25, 30, 35 e 40°C frente ao crescimento micelial de C. musae. O delineamento experimental utilizado foi o inteiramente casualizado, utilizando cinco repetições. Os dados foram submetidos à análise de variância (ANOVA) e as médias comparadas pelo teste Tukey (0.05). Na avaliação da atividade antifúngica foram adicionadas as concentrações de 0, 50, 100, 150 e 200 μL/mL dos extratos vegetais individualmente ao meio de cultura BDA. Os resultados das diferentes concentrações foram submetidos à análise de variância, associada ao teste de regressão linear simples e múltipla, ao nível de 1% de significância. Todas as análises foram realizadas utilizando a linguagem de programação R. As temperaturas de 25 e 30°C proporcionaram maior crescimento micelial do patógeno, com valores de IVCM de 1,7 e 1,3 cm.dia-1 , respectivamente. No ensaio com os extratos de limão taiti e alho, todas as concentrações testadas apresentaram inibição do patógeno. O extrato de limão-galego apresentou os mesmos resultados do fungicida, inibindo o crescimento total do fungo. Os extratos vegetais em estudo apresentam potencial para o manejo alternativo da antracnose. PALAVRAS-CHAVE: Controle fúngico, Doença pós-colheita, Fitopatógeno.

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Section: Methodsunclassified

EFEITO DA TEMPERATURA E EXTRATOS DE PLANTAS NO CONTROLE DA ANTRACNOSE DO FRUTO DA BANANEIRA (Musa sp.) CAUSADA POR Colletotrichum musae

Oliveira¹,

Oliveira²,

Ferreira³

et al. 2018

Enci Bio

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“…Mean values in columns followed by the same letter are not significantly different, according to Scott-Knott test (p = .05) Dias et al, 2005)…”

mentioning

confidence: 89%

“…Morphological, cytological, physiological and molecular analyses of strains from blister spot lesions can increase the knowledge on population structure, processes and structures of infection (Feitosa et al, 1977;Dias, Pozza, Abreu, & Miranda, 2005). Likewise, it is important to investigate the mechanisms that increase the genetic variability of the pathogen and, especially, to assess the role of strains in the host.…”

mentioning

confidence: 99%

Investigating variability and behaviour of Colletotrichum gloeosporioides strains from lesions of coffee blister spot

Pereira¹,

Souza²,

Pereira³

et al. 2019

Journal of Phytopathology

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Coffee blister spot has been associated with species from the Colletotrichum genus, but there is no information on the variability of isolates present on leaf lesions. This study evaluated a population of Colletotrichum gloeosporioides strains from blister spot lesions in Coffea arabica. Colletotrichum spp. isolates were collected from blister spot lesions on leaves of coffee trees from Catuaí and Topázio cultivars (Coffea arabica). Monosporic cultures were obtained from colonies with sporulation. A pathogenicity test was carried out by inoculation of pathogens on the leaves of young coffee plants. C. gloeosporioides strains were characterized by morphologial, cytological and physiological analyses. The molecular analysis was carried out using Inter‐Retrotransposon Amplified Polymorphism (IRAP) markers. C. gloeosporioides strains showed no pathogenicity on coffee plants and presented a wide variability in all traits evaluated. The presence of sexual strains, formation of CATs (conidial anastomosis tubes) among conidial strains and high mycelial compatibility among strains observed suggest the occurrence of sexual and asexual recombination. The role of these C. gloeosporioides strains on the lesions of coffee plant leaves is unclear.

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“…The diameter of each colony was measured in two directions (Dias et al, 2005). Where: D = current average diameter of the colony; Da = the average diameter of the colony in the previous day; N = number of hours or days after inoculation.…”

Section: Evaluationsmentioning

confidence: 99%

In vitro susceptibility of Corynespora cassiicola isolate from Brazil fields to fungicide

Cabral¹,

Campos²,

Costa³

et al. 2016

Afr. J. Agric. Res.

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Corynespora cassiicola which cause the target spot in soybeans can lead to significant reductions in grain yield. Chemical control mechanisms recommended for disease control was performed with low efficacy in the field due to loss of the pathogen sensitivity to fungicides. This study evaluated the effect of fungicides in inhibiting C. cassiicola using in vitro test. Four isolates from different regions of Rio Verde -GO were used. The experimental design was completely randomized with nine treatments and five doses (0.0, 0.1, 1.0, 10 and 100 mg). The fungicides, in the various concentrations, were added in PDA medium and poured into Petri dishes, 80 mm in diameter. Then 5 mm discs, containing fungy mycelia, were transferred to the center of the plate and incubated in growth chamber at 25°C with photoperiod of 12 h. The mycelial growth in colony diameter was measured every 24 h. The inhibition percentage of each fungicide on various isolates of fungi was determined, by observing area under the curve of mycelial progress (AUCMP) and by determining the mycelial growth speed rate (MGSR) was determined. All treatments showed a decrease in SRMG with increased applied dose, the fungicide fluazinam had the best performance, with 100% mycelial growth inhibition at all dose tested and in both areas in which the isolate was obtained. The choice of product and dose to be applied directly will be helpful in the chemical control programs ensuring higher yields at the end of the crop cycle.

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Efeito da temperatura no crescimento micelial, produção e germinação de conídios de Colletotrichum spp. isolados de Coffea arabica L

Cited by 15 publications

References 9 publications

EFEITO DA TEMPERATURA E EXTRATOS DE PLANTAS NO CONTROLE DA ANTRACNOSE DO FRUTO DA BANANEIRA (Musa sp.) CAUSADA POR Colletotrichum musae

EFEITO DA TEMPERATURA E EXTRATOS DE PLANTAS NO CONTROLE DA ANTRACNOSE DO FRUTO DA BANANEIRA (Musa sp.) CAUSADA POR Colletotrichum musae

Investigating variability and behaviour of Colletotrichum gloeosporioides strains from lesions of coffee blister spot

In vitro susceptibility of Corynespora cassiicola isolate from Brazil fields to fungicide

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