First report of teak leaf rust disease caused by<i>Olivea tectonae</i>in Brazil

Cabral, P. G. C.; Capucho, Alexandre Sandri; Pereira, Olinto Liparini; Maciel-Zambolim, E.; Freitas, Rafael Leite de; Zambolim, Laércio

doi:10.1071/dn10041

Cited by 6 publications

(4 citation statements)

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“…Of course, the records from the state of Mato Grosso may represent a recent occurrence of the mycoparasite, possibly introduced together with the exotic rust species O. tectonae. The latter was recorded for the first time in Brazil by Cabral et al (2010) on the exotic timber tree Tectona grandis. As the state of Mato Grosso is distant from the coffee producing areas of Brazil, where H. vastatrix commonly occurs, the fungus may not have been able, as yet, to spread to these areas; or, perhaps, because surveys of mycoparasites of H. vastatrix in Brazil have to date involved only limited sampling, concentrated in the south-eastern states, D. tectonae may also be present on CLR but has remained undetected.…”

Section: Discussionmentioning

confidence: 96%

A fungus-eat-fungus world: Digitopodium, with particular reference to mycoparasites of the coffee leaf rust, Hemileia vastatrix

et al. 2021

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Digitopodium hemileiae was described originally in 1930 as Cladosporium hemileiae; growing as a mycoparasite of the coffee leaf rust (CLR), Hemileia vastatrix, in a sample of diseased leaves of Coffea canephora collected in the Democratic Republic of Congo. No cultures from this material exist. More recently, the type material was re-examined and, based on morphological features, considered to be incorrectly placed in Cladosporium. The new genus Digitopodium was erected to accommodate this species. Interest in fungal antagonists of H. vastarix, as potential biocontrol agents of CLR, led to comprehensive surveys for mycoparasites, both in the African centre of origin of the rust, as well as in its South American exotic range. Among the rust specimens from Ethiopia, one was found to be colonized by a fungus congeneric with, and similar to, D. hemileiae. Pure cultures obtained from the Ethiopian material enabled a molecular study and for its phylogenetic position to be elucidated, based on DNA sequence data from the ITS and LSU regions. Molecular data showed that two members of the recently erected genus Hyalocladosporiella (Herpotrichiellaceae: Chaetothyriales) are congeneric with Digitopodium from Ethiopia and morphologically similar to both D. hemileiae and the two Ethiopian isolates. These isolates were found to be morphologically and genetically identical to H. tectonae, described previously from Brazil. Thus, species of Hyalocladosporiella are re-allocated to Digitopodium here; including D. tectonae, and a novel species, D. canescens, recently found in Brazil growing as a mycoparasite of Puccinia thaliae. The potential use of D. hemileiae and D. tectonae for classical biological control of CLR is discussed.

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Section: Discussionmentioning

confidence: 96%

A fungus-eat-fungus world: Digitopodium, with particular reference to mycoparasites of the coffee leaf rust, Hemileia vastatrix

et al. 2021

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“…Olivea tectonae causing teak leaf rust disease is a widely distributed pathogen in Asia and more recently has been reported from Australia, and Central and South America (Daly 2006; Cabral 2010). However, as far as could be established, teak rust disease has never been reported in Africa (Doilom et al , 2016).…”

Section: Figurementioning

confidence: 99%

First occurrence of teak leaf rust caused by Olivea tectonae in Côte d'Ivoire and Africa

Koffi¹,

N’douba²,

Kouassi³

et al. 2018

New Disease Reports

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“…The disease became established through natural infection from an inoculum source that probably was already present in the study area. When first symptoms became evident, some non-marked leaves were collected and brought to the laboratory, in order to carry out the diagnosis (Cabral et al 2010). Rust incidence was computed taking into account the number of leaves of each tree with rust symptoms related to the total sample, expressed in percentage.…”

Section: Palavras-chave: Epidemiologia Tectona Grandis Olivea Neotementioning

confidence: 99%

Temporal progress of teak rust in a tropical area of Tocantins State, Brazil

et al. 2017

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Rust, caused by Olivea neotectonae, stands out as the main teak disease, causing premature defoliation regardless of the tree's growth stage. In this study, we aimed to assess the temporal progress of rust in adult teak plants in southern Tocantins State (Brazil). Both rust incidence and severity were evaluated and the disease progress curves were obtained, adjusting to monomolecular, logistic and Gompertz mathematical models. Data from incidence and severity were correlated with climate variables collected by the agrometeorological station located in the study area. Rust incidence reached 100% at 98 days after beginning of the evaluations (DBE). The highest severity (equal or above 75%) was observed at 147 DBE. There was a significant and negative correlation between severity and minimum temperature. The adjustment of the Gompertz model suggests that control measures should be aimed primarily to reduce the rate of disease progress. KEYWORDS: epidemiology, Tectona grandis, Olivea neotectonae Progresso temporal da ferrugem da teca em uma área tropical no Estado do Tocantins, Brasil RESUMOA ferrugem, causada por Olivea neotectonae, destaca-se como principal doença da teca, causando desfolha prematura em todos os estádios fenológicos da cultura. O objetivo do estudo foi avaliar o progresso temporal da ferrugem em plantas adultas de teca no sul do Estado do Tocantins. Avaliaram-se a incidência e severidade da ferrugem (escala de notas) e obtiveram-se curvas de progresso da doença, que foram ajustadas aos modelos matemáticos monomolecular, logístico e Gompertz. Correlacionaramse os dados de incidência e severidade com as variáveis climáticas coletadas na estação meteorológica, localizada na região do estudo. A incidência da ferrugem atingiu 100% aos 98 dias a partir do início das avaliações (DIA). A maior severidade (igual ou acima de 75%) foi observada aos 147 DIA. Houve correlação negativa e significativa entre severidade e temperatura mínima. O ajuste ao modelo de Gompertz sugere que medidas de controle devem ser tomadas objetivando reduzir a taxa de progresso da doença.

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First report of teak leaf rust disease caused byOlivea tectonaein Brazil

Abstract: This note reports the first occurrence of teak leaf rust disease caused by Olivea tectonae in Brazil. High severity of teak leaf rust was found on leaves of ornamental plants in the state of Minas Gerais and Espírito Santo, Brazil.

Cited by 6 publications

References 4 publications

A fungus-eat-fungus world: Digitopodium, with particular reference to mycoparasites of the coffee leaf rust, Hemileia vastatrix

A fungus-eat-fungus world: Digitopodium, with particular reference to mycoparasites of the coffee leaf rust, Hemileia vastatrix

First occurrence of teak leaf rust caused by Olivea tectonae in Côte d'Ivoire and Africa

Temporal progress of teak rust in a tropical area of Tocantins State, Brazil

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