Poplar rusts in Australia with comments on potential conifer rusts

Walker, John; Hartigan, D.; Bertus, A. L.

doi:10.1111/j.1439-0329.1974.tb00424.x

Cited by 42 publications

(15 citation statements)

References 11 publications

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“…via nursery and garden plants) are likely to be the greatest dispersers of myrtle rust, however, nectar-feeding fauna, such as bats and birds, could also act as vectors, especially in those host plants that are likely to have myrtle rust high in the crown, such as M. quinquenervia. Experience with poplar rust (Melampsora medusa)-which spread from greater-Sydney north to Queensland and south to Victoria within 14 weeks of detection (Walker et al 1974)-provide some indication of how rapidly rusts can spread with suitable hosts and climatic conditions. Experiments in situ at IP1 revealed that during the colder winter months on the Central Coast of NSW the period from inoculation to sporulation (latent period) lengthened significantly.…”

Section: Discussionmentioning

confidence: 99%

Rapidly expanding host range for Puccinia psidii sensu lato in Australia

Carnegie

Lidbetter

2011

Australasian Plant Pathol.

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A rust affecting Myrtaceae was recently detected in New South Wales, Australia. Based on urediniospore morphology and host range, it was identified as Uredo rangelii, a taxon regarded as a member of the eucalyptus/ guava rust (Puccinia psidii sensu lato) complex, although confusion currently surrounds its taxonomy. The exotic rust was given the common name of myrtle rust to distinguish it from eucalyptus/guava rust. The more recent discovery of teliospores in NSW that match those of P. psidii sensu stricto indicates the rust in Australia is a strain (with tonsured urediniospores) of P. psidii s.l. Outside Australia, P. psidii has a wide host range within Myrtaceae, being reported from 129 species in 33 genera, and is very damaging in South and Central America-including in eucalypt plantations in Brazil-the Caribbean and in Florida and Hawaii. To ascertain the potential threat to forestry in Australia posed by the introduced rust, we tested key forestry species, as well as key known hosts of eucalyptus/ guava rust, in artificial inoculation experiments. We showed that several species of Eucalyptus are susceptible (viz. E. pilularis, E. cloeziana, E. agglomerata and E. grandis), as is Melaleuca quinquenervia. Observations during testing revealed a lengthened latent period (from inoculation until pustule formation and eruption) of four to five weeks during winter. Here we also report on observations on new hosts from surveys in NSW under the emergency response that followed the detection of the exotic rust, and surveys in NSW and Queensland following the cessation of the emergency response. In Australia, P. psidii s.l. has currently been found on 107 host species in 30 genera during surveys, including species in Angophora, Asteromyrtus, Tristaniopsis, Ugni, Uromyrtus and Xanthostemon. Species under cultivation (in nurseries and gardens) that are severely affected include Gossia inophloia, Agonis flexuosa, Syzygium jambos and S. anisatum while species that are severely damaged in native bushland include Rhodamnia rubescens, Rhodomyrtus psidioides, Choricarpia leptopetala and Melaleuca quinquenervia.

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Section: Discussionmentioning

confidence: 99%

Rapidly expanding host range for Puccinia psidii sensu lato in Australia

Carnegie

Lidbetter

2011

Australasian Plant Pathol.

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“…Interregional movement of pathogens and plant material can lead to new epidemics. Melampsora larici-populina Kleb., a poplar leaf rust fungus native to Eurasia, was introduced and subsequently spread on exotic poplars planted in Australia (Walker et al, 1974), New Zealand and South Africa in the 1970s, leading to the failure of intensively managed plantations of hybrid poplars . In contrast, in Quebec, this rust species has frequently been found on susceptible hybrid clones since the first report in 2001 (Innès et al, 2004), but its impact on poplar production remains low for the time being (Péri-net, unpublished results).…”

Section: Diseasesmentioning

confidence: 99%

Recent advances related to poplar leaf spot and canker caused bySeptoria musiva

Feau

Mottet

Périnet

et al. 2010

Canadian Journal of Plant Pathology

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The expansion of poplar culture in the north-central and northeastern regions of North America has been limited because many poplar clones are susceptible to the leaf spot and canker disease caused by the fungus Septoria musiva (teleomorph Mycosphaerella populorum). This review provides a brief historical account and summarizes the current state of knowledge focussing on developments in the areas of taxonomy and systematics, host associations and symptomatology. Since selection and deployment of resistant clones is one of the best disease-control strategies against S. musiva, recent advances in our knowledge of epidemiology, genetics and variability in virulence and aggressiveness of the populations of this fungus are also addressed.Résumé: L'expansion de la culture du peuplier dans les régions du centre-nord et du nord-est de l'Amérique du Nord a été freinée parce que de nombreux clones de ce dernier sont sensibles à la tache foliaire et au chancre causés par Septoria musiva (téléomorphe de Mycosphaerella populorum). Cet examen offre un bref aperçu historique de nos connaissances ainsi qu'un résumé de l'état actuel de ces dernières relativement aux progrès effectués dans les domaines de la taxonomie et de la systématique, des associations d'hôtes ainsi que de la symptomatologie. Étant donné que la sélection et l'utilisation de clones résistants comptent parmi les meilleures stratégies de lutte contre S. musiva, nous abordons également les récentes percées effectuées dans les domaines de l'épidémiologie, de la génétique ainsi que de la variabilité de la virulence et de l'agressivité chez les populations de ce champignon.Mots clés: maladies du peuplier, Mycosphaerella populorum, peuplier hybride, résistance à la maladie, Tache septorienne

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“…Experience with previous rust incursions informed the decision that eradication was unlikely to be effective and that spread would be rapid. Poplar rust (Melampsora medusae), for example, was detected in the Sydney region in 1972 and within 14 weeks had spread north to Queensland and south to Victoria (Walker et al 1974). Antirrhinum rust (Puccinia antirrhini) was detected in a b c d e Fig.…”

Section: Discussionmentioning

confidence: 97%