Elucidating the interactions between the rust Hemileia vastatrix and a Calonectria mycoparasite and the coffee plant

The livelihood of at least 120 million people worldwide depends on the coffee supply chain. Coffee rust is among the main diseases that attack the coffee plant and is caused by the Hemileia vastatrix fungus at temperatures between 10 - 30° C. Coffee rust infestation leads to production losses of over $1 billion annually worldwide. Coffee is the second largest traded commodity worldwide, with about $100 billion in volume traded annually. Understanding if there is a relationship between Temperature, Rainfall, Rust, Production and Futures coffee rust variables is important. This research offers the first known quantitative framework for describing and visualizing the correlation between coffee rust, amount of coffee produced and futures prices..

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New species and records of Trichoderma isolated as mycoparasites and endophytes from cultivated and wild coffee in Africa

Scientific Reports ◽

10.1038/s41598-021-84111-1 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

María del Carmen H. Rodríguez ◽

Harry C. Evans ◽

Lucas M. de Abreu ◽

Davi M. de Macedo ◽

Miraine K. Ndacnou ◽

...

Keyword(s):

New Species ◽

Cloud Forest ◽

Elongation Factor ◽

Classical Biological Control ◽

Hemileia Vastatrix ◽

Translation Elongation ◽

Coffee Leaf Rust ◽

Novel Taxa ◽

Coffee Plants ◽

Wild Coffee

AbstractA survey for species of the genus Trichoderma occurring as endophytes of Coffea, and as mycoparasites of coffee rusts (Hemileia), was undertaken in Africa; concentrating on Cameroon and Ethiopia. Ninety-four isolates of Trichoderma were obtained during this study: 76 as endophytes of healthy leaves, stems and berries and, 18 directly from colonized rust pustules. A phylogenetic analysis of all isolates used a combination of three genes: translation elongation factor-1α (tef1), rpb2 and cal for selected isolates. GCPSR criteria were used for the recognition of species; supported by morphological and cultural characters. The results reveal a previously unrecorded diversity of Trichoderma species endophytic in both wild and cultivated Coffea, and mycoparasitic on Hemileia rusts. Sixteen species were delimited, including four novel taxa which are described herein: T. botryosum, T. caeruloviride, T. lentissimum and T. pseudopyramidale. Two of these new species, T. botryosum and T. pseudopyramidale, constituted over 60% of the total isolations, predominantly from wild C. arabica in Ethiopian cloud forest. In sharp contrast, not a single isolate of Trichoderma was obtained using the same isolation protocol during a survey of coffee in four Brazilian states, suggesting the existence of a ‘Trichoderma void’ in the endophyte mycobiota of coffee outside of Africa. The potential use of these African Trichoderma isolates in classical biological control, either as endophytic bodyguards—to protect coffee plants from Hemileia vastatrix, the fungus causing coffee leaf rust (CLR)—or to reduce its impact through mycoparasitism, is discussed, with reference to the on-going CLR crisis in Central America.

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Development of technology vermicompost production for the coffee plant Industry

Journal of Physics Conference Series ◽

10.1088/1742-6596/1876/1/012020 ◽

2021 ◽

Vol 1876 (1) ◽

pp. 012020

Author(s):

Zulhipri ◽

Erdawati ◽

Agung Purwanto

Keyword(s):

Plant Industry ◽

Coffee Plant

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

IMA Fungus ◽

10.1186/s43008-020-00052-w ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Adans A. Colmán ◽

Harry C. Evans ◽

Sara S. Salcedo-Sarmiento ◽

Uwe Braun ◽

Kifle Belachew-Bekele ◽

...

Keyword(s):

Leaf Rust ◽

Democratic Republic Of Congo ◽

Sequence Data ◽

Molecular Study ◽

Classical Biological Control ◽

Coffea Canephora ◽

Molecular Data ◽

Phylogenetic Position ◽

Hemileia Vastatrix ◽

Coffee Leaf Rust

AbstractDigitopodium 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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Effects of ethephon and urea on ripening of fruits and leaf abscission of coffee (Coffea arábica L.)

Anais da Escola Superior de Agricultura Luiz de Queiroz ◽

10.1590/s0071-12761981000100022 ◽

1981 ◽

Vol 38 (1) ◽

pp. 281-288

Author(s):

Paulo R.C. Castro ◽

José F. Franco ◽

José D. Costa ◽

Clarice G.B. Demétrio

Keyword(s):

Field Experiment ◽

Phosphonic Acid ◽

Fruit Ripening ◽

Coffea Arabica ◽

Leaf Abscission ◽

Coffee Plant ◽

Low Concentration ◽

Coffea Arabica L

A field experiment was carried out to investigate the effects of ethephon and urea on ripening of fruits and leaf abscission of coffee plant. Ethephon (2-chloroethane phosphonic acid) sprays were applied to green Coffea arábica berries 26 days before counting date in concentrations of 0.5 and 0.25 ml/1 from Ethrel (240 a.i./l). The chemical accelerated the onset of fruit ripening at both concentrations. The efficacy of ethephon was increased adding urea. Ethephon 0.5 ml/1 promoted abscission of leaves and low concentration reduced shedding of leaves. The treatments did not affect the growth and production on the next harvest.

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Hormesis with glyphosate depends on coffee growth stage

Anais da Academia Brasileira de Ciências ◽

10.1590/s0001-37652013005000027 ◽

2013 ◽

Vol 85 (2) ◽

pp. 813-822 ◽

Cited By ~ 25

Author(s):

LEONARDO B. DE CARVALHO ◽

PEDRO L.C.A. ALVES ◽

STEPHEN O. DUKE

Keyword(s):

Plant Growth ◽

Weed Management ◽

Growth Stage ◽

Growth Stages ◽

Coffee Plant ◽

Herbicide Application ◽

Coffee Plantations ◽

Plant Growth Stages ◽

Coffee Plants ◽

Almost All

Weed management systems in almost all Brazilian coffee plantations allow herbicide spray to drift on crop plants. In order to evaluate if there is any effect of the most commonly used herbicide in coffee production, glyphosate, on coffee plants, a range of glyphosate doses were applied directly on coffee plants at two distinct plant growth stages. Although growth of both young and old plants was reduced at higher glyphosate doses, low doses caused no effects on growth characteristics of young plants and stimulated growth of older plants. Therefore, hormesis with glyphosate is dependent on coffee plant growth stage at the time of herbicide application.

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Variedades clonais de café Conilon para o Estado do Espírito Santo

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2001000500006 ◽

2001 ◽

Vol 36 (5) ◽

pp. 765-770 ◽

Cited By ~ 18

Author(s):

Scheilla Marina Bragança ◽

Carlos Henrique Siqueira de Carvalho ◽

Aymbiré Francisco Almeida da Fonseca ◽

Romário Gava Ferrão

Keyword(s):

Coffea Canephora ◽

Hemileia Vastatrix ◽

Espírito Santo ◽

Espirito Santo

O objetivo deste trabalho foi selecionar e multiplicar clones de café Conilon (Coffea canephora Pierre ex Froehner) para obtenção de variedades clonais mais produtivas e de melhor qualidade. Foram selecionadas 267 plantas matrizes cujos parâmetros de seleção foram: produtividade, incidência de ferrugem (Hemileia vastatrix Berk et Br.) e mancha manteigosa (Colletotrichum sp.), arquitetura e vigor das plantas, tamanho e época da maturação dos frutos. Os clones selecionados foram avaliados em quatro experimentos, na Fazenda Experimental de Marilândia, pertencente ao INCAPER, em Marilândia, ES. O ensaio foi instalado em Latossolo Vermelho-Amarelo, no espaçamento de 3,5 m entre linhas e 1,5 m entre covas. Utilizou-se o delineamento de blocos casualizados, com quatro repetições e seis plantas por parcela. Dos clones selecionados, numa primeira fase, foram lançadas as primeiras variedades clonais de café Conilon, para o Estado do Espírito Santo, denominadas EMCAPA 8111, EMCAPA 8121 e, EMCAPA 8131, de ciclo de maturação precoce, médio e tardio, respectivamente, e com produtividades média de quatro colheitas oscilando entre 58 e 60 sacas de 60 kg, superando em até 33% a produtividade da testemunha.

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Melhoramento do cafeeiro: XLI. Produtividade do híbrido de timor, de seus derivados e de outras fontes de resistência a Hemileia vastatrix

Bragantia ◽

10.1590/s0006-87051989000100007 ◽

1989 ◽

Vol 48 (1) ◽

pp. 73-86 ◽

Cited By ~ 7

Author(s):

Alcides Carvalho ◽

Luiz Carlos Fazuoli ◽

Waldir Marques da Costa

Keyword(s):

Coffea Arabica ◽

Hemileia Vastatrix ◽

De Se

Progênies do café Híbrido de Timor e F02-F4 oriundas de cruzamentos desse café com outros cultivares resistentes ou não a Hemileia vastatrix e cruzamentos entre outras fontes de resistência ao patógeno, foram avaliadas em três experimentos, em Campinas, para observação de sua produtividade, em relação a alguns cultivares de Coffea arabica tomados como testemunhas. As progênies do Híbrido de Timor apresentaram pequena produtividade, indicando baixa adaptação, com exceção daquelas de prefixos C 1737, C 1738 e C 1699. As progênies derivadas de cruzamentos do Híbrido de Timor com cultivares de porte pequeno, como Caturra Vermelho e Vila Sarchi de Coffea arabica, mostraram-se, também, pouco produtivas. Destacou-se apenas a progênie C 1669, rústica. Das combinações do Híbrido de Timor com outros cultivares de C. arabica com resistência a H. vastatrix, apenas a progênie C 1698 se revelou melhor. As progênies F2 derivadas de cruzamentos do cultivar S 795 portador do fator S H3 de resistência com Mundo Novo, deram produções bastante razoáveis. Notou-se, de modo geral, acentuada variabilidade na produção das progênies, o que é indicado pelos elevados valores dos coeficientes de variação obtidos nos três experimentos. Os dados desses experimentos mostraram a dificuldade de aproveitamento das progênies e dos derivados do Híbrido de Timor analisados. Tratando-se, no entanto, de material de elevado grau de resistência às raças de H. vastatrix, novas hibridações deverão ser sintetizadas, com cultivares comerciais, a fim de se conseguirem linhagens resistentes, vigorosas e mais produtivas.

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