The Rusts of South America Based on the Holway Collections—V

Jackson, H. S.

doi:10.1080/00275514.1931.12017056

Cited by 9 publications

(6 citation statements)

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“…myrtacearum . It is known only from the type collection in Brazil on an undetermined species of Myrtaceae (Jackson, ), and has somewhat larger urediniopsores (24–32 μ m) with 1·0 μ m thick spore walls (Hennen et al ., ).…”

Section: Resultsmentioning

confidence: 99%

Phakopsora myrtacearum sp. nov., a newly described rust (Pucciniales) on eucalypts in eastern and southern Africa

et al. 2015

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Outbreaks of a rust disease in eucalypt forestry plantations and nurseries in Kenya, Mozambique and South Africa occurred between 2009 and 2014. The pathogen was identified using morphology and molecular phylogenetic analyses as an undescribed species in the Phakopsoraceae. A systematic study, based on nuclear ribosomal DNA, showed that it is a species of Phakopsora, herein named Phakopsora myrtacearum sp. nov. This new species of rust is the second validly described species on Eucalyptus, along with Puccinia psidii. Phakopsora myrtacearum is distinguished from P. psidii by leaf symptoms, morphology of the urediniospores and distinct phylogenetic placement. Phakopsora myrtacearum has been found on three species of Eucalyptus in Kenya, Mozambique and South Africa, and it may have future negative implications for commercial forestry in these areas.

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Section: Resultsmentioning

confidence: 99%

Phakopsora myrtacearum sp. nov., a newly described rust (Pucciniales) on eucalypts in eastern and southern Africa

et al. 2015

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“…Three rust fungi are known on Cactaceae in South America, including A. opuntiae in Argentina (34) and Bolivia (3,27,28). This is the first report of a rust on this host family in North America.…”

Section: New Species and Recordsmentioning

confidence: 99%

“…Uredinia on abaxial leaf surfaces, very small, round, long remaining covered by the epidermis. Urediniospores light cinnamon-brown, obovoid, globoid, ellipsoid, or sometimes irregular, (23-) [25][26][27][28][29][30][31][32][33][34][35][36] x 20-24 (-27) pm in front view, somewhat flattened on the surfaces with the germ pores (14-18.5 Mm thick in side view); wall 1-1.5 Mm thick, often to 2.5 Mm thick at the pores, echinulate with widely spaced fine spines; germ pores two (rarely three), equatorial and opposite each other. ed that the teliospore walls are verrucose.…”

Section: Puccinia Thelypodiimentioning

confidence: 99%

New Species and Records of Uredinales from the Neotropics

Hennen

McCain

1993

Mycologia

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“…Puccinia psidii is a biotrophic fungus (Basidiomycota, Pucciniales) native from South America and the Caribbean region, with its wide natural geographical distribution including Brazil (Grillo, ; Jackson, ; Pickel, ; Thurston, ; Vellozo, Nowacki, & Vernalha, ; Winter, ), Uruguay (Spegazzini, ), Puerto Rico (Arthur, ), Paraguay (Spegazzini, ), Ecuador (Stevenson, ), Colombia (Kern & Chardón, ), Dominican Republic (Kern, ), Venezuela (Chardon & Toro, ), Argentina (Di Fonzo, ), Jamaica (Smith, ), Barbados and Windward Islands (Baker & Dale, ), and Trinidad and Tobago (Baker & Dale, ). In addition, this disease has been reported in many parts of the world such as the United States (Marlatt & Kimbrough, ; Mellano, ; Rayachhetry, Elliot, & Van, ; Uchida, Zhong, & Killgore, ; Zambino & Nolan, ), Mexico (Gallegos & Cummins, ), Japan (Kawanishi et al., ), Australia (Carnegie et al., ), China (Zhuang & Wei, ), South Africa (Roux, Greyling, Coutinho, Verleur, & Wingfield, ), New Caledonia (Giblin, ), Colombia (Rodas et al., ) and Indonesia (McTaggart et al., ).…”

Section: Introductionmentioning

confidence: 99%

Climatic favourability zones for Eucalyptus rust in Brazil

et al. 2016

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Brazilian forest-based industries are supported by more than 5.5 million hectares of Eucalyptus growing under different climatic conditions with different degrees of favourability for rust Puccinia psidii, including both traditional and expanding areas, where such disease is of major concern for the industry, foresters and scientists. The main objective of this study was to define favourable climatic zones for Eucalyptus rust in Brazil with the following aims: (i) to develop a spatial method for estimating the mean night-time temperature (T ng ); (ii) to assess and validate a Eucalyptus rust model;and (iii) to map Eucalyptus rust favourability zones in Brazil based on the proposed model. A straightforward method, based only on latitude, day of the year, maximum and minimum air temperatures, was developed to estimate T ng , which is a key variable for a proper application of Ruiz rust model. Based on 37 field experiments with natural rust occurrence, it was observed that climatic conditions are determining factors for disease severity. Significant correlations between disease severity observed in the field and climatic conditions were found: a negative correlation with temperature (r = .50, p < .01) and a positive correlation with relative humidity (r = .89, p < .0001). A significant correlation (r = .81, p < .0001) between the normalized infection index, produced from Ruiz model, and the average rust score was also observed. Once the model was validated under field conditions, it was applied using historical average data of air temperature and leaf wetness duration to obtain monthly Eucalyptus rust favourability maps for the whole country. These final maps show that favourable climatic zones for Eucalyptus rust are extremely dynamic, with high temporal and spatial variability in Brazil and that climatic conditions should be considered for expansion of Eucalyptus to new areas, in breeding programmes, and for defining the most suitable seasons for forest establishment in each climate of the country. These results provide forestry managers with practical tools to reduce uncertainty about the expected severity of Eucalyptus rust in Brazil.

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The Rusts of South America Based on the Holway Collections—V

Cited by 9 publications

References 0 publications

Phakopsora myrtacearum sp. nov., a newly described rust (Pucciniales) on eucalypts in eastern and southern Africa

Phakopsora myrtacearum sp. nov., a newly described rust (Pucciniales) on eucalypts in eastern and southern Africa

New Species and Records of Uredinales from the Neotropics

Climatic favourability zones for Eucalyptus rust in Brazil

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