Occurrence of Peronospora sparsa (P. rubi) on cultivated and wild Rubus species in Finland and Sweden
Summary An outbreak of a dryberry disease caused by Peronospora sparsa (syn. P. rubi ) occurred in plantations of arctic bramble ( Rubus arcticus subsp. arcticus ) in Finland in the middle of 1990s. The disease persists and is most severe in cool and rainy summers. The disease has not been encounter...
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crwiley:10.1111/j.1744-7348.2000.tb00042.x 2024-05-19T07:35:36+00:00 Occurrence of Peronospora sparsa (P. rubi) on cultivated and wild Rubus species in Finland and Sweden KOPONEN, H HELLQVIST, S LINDQVIST‐KREUZE, H BÅNG, U VALKONEN, J P T 2000 http://dx.doi.org/10.1111/j.1744-7348.2000.tb00042.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1744-7348.2000.tb00042.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1744-7348.2000.tb00042.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Annals of Applied Biology volume 137, issue 2, page 107-112 ISSN 0003-4746 1744-7348 journal-article 2000 crwiley https://doi.org/10.1111/j.1744-7348.2000.tb00042.x 2024-04-25T08:28:50Z Summary An outbreak of a dryberry disease caused by Peronospora sparsa (syn. P. rubi ) occurred in plantations of arctic bramble ( Rubus arcticus subsp. arcticus ) in Finland in the middle of 1990s. The disease persists and is most severe in cool and rainy summers. The disease has not been encountered in northern Sweden where cultivars ( R. arcticus nothosubsp. stellarcticus ) different from those in Finland are used. The occurrence of P. sparsa in wild Rubus spp. is virtually unknown in both areas and it is not known whether they constitute a potential infection source. Therefore, the aim of this study was to investigate the occurrence of P. sparsa on wild Rubus spp. growing in the vicinity of cultivations of arctic bramble. Symptomatic plants were sampled in 1997–1999. P. sparsa was detected using a light microscope, preceded by incubation of the sample in vitro if necessary, and by a polymerase chain reaction (PCR) based method. Plants of cultivated R. arcticus subsp. arcticus were commonly infected by P. sparsa in Finland. P. sparsa was also found on the cultivated R. arcticus nothosubsp. stellarcticus in Finland and Sweden. However, the infected plants of the cultivars of nothosubsp. stellarcticus seemed to be much less damaged than the cultivars of subsp. arcticus . Plants infected with P. sparsa were found in the populations of wild R. arcticus subsp. arcticus in both countries, and in cloudberry ( R. chamaemorus ) in natural habitats in Finland. In addition, P. sparsa was detected on specimens of R. arcticus subsp. arcticus (collected in 1966–1985) and R. chamaemorus (collected in 1899–1981) in Finnish herbaria. The samples of R. idaeus and R. saxatilis collected from the field in this study or investigated in the herbaria were not infected with P. sparsa . These data show that P. sparsa has not recently invaded Finland but has become an economically significant pathogen during the rapid expansion of cultivation of the apparently sensitive clones of arctic bramble. Article in Journal/Newspaper Arctic Northern Sweden Wiley Online Library Annals of Applied Biology 137 2 107 112 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Summary An outbreak of a dryberry disease caused by Peronospora sparsa (syn. P. rubi ) occurred in plantations of arctic bramble ( Rubus arcticus subsp. arcticus ) in Finland in the middle of 1990s. The disease persists and is most severe in cool and rainy summers. The disease has not been encountered in northern Sweden where cultivars ( R. arcticus nothosubsp. stellarcticus ) different from those in Finland are used. The occurrence of P. sparsa in wild Rubus spp. is virtually unknown in both areas and it is not known whether they constitute a potential infection source. Therefore, the aim of this study was to investigate the occurrence of P. sparsa on wild Rubus spp. growing in the vicinity of cultivations of arctic bramble. Symptomatic plants were sampled in 1997–1999. P. sparsa was detected using a light microscope, preceded by incubation of the sample in vitro if necessary, and by a polymerase chain reaction (PCR) based method. Plants of cultivated R. arcticus subsp. arcticus were commonly infected by P. sparsa in Finland. P. sparsa was also found on the cultivated R. arcticus nothosubsp. stellarcticus in Finland and Sweden. However, the infected plants of the cultivars of nothosubsp. stellarcticus seemed to be much less damaged than the cultivars of subsp. arcticus . Plants infected with P. sparsa were found in the populations of wild R. arcticus subsp. arcticus in both countries, and in cloudberry ( R. chamaemorus ) in natural habitats in Finland. In addition, P. sparsa was detected on specimens of R. arcticus subsp. arcticus (collected in 1966–1985) and R. chamaemorus (collected in 1899–1981) in Finnish herbaria. The samples of R. idaeus and R. saxatilis collected from the field in this study or investigated in the herbaria were not infected with P. sparsa . These data show that P. sparsa has not recently invaded Finland but has become an economically significant pathogen during the rapid expansion of cultivation of the apparently sensitive clones of arctic bramble. |
format |
Article in Journal/Newspaper |
author |
KOPONEN, H HELLQVIST, S LINDQVIST‐KREUZE, H BÅNG, U VALKONEN, J P T |
spellingShingle |
KOPONEN, H HELLQVIST, S LINDQVIST‐KREUZE, H BÅNG, U VALKONEN, J P T Occurrence of Peronospora sparsa (P. rubi) on cultivated and wild Rubus species in Finland and Sweden |
author_facet |
KOPONEN, H HELLQVIST, S LINDQVIST‐KREUZE, H BÅNG, U VALKONEN, J P T |
author_sort |
KOPONEN, H |
title |
Occurrence of Peronospora sparsa (P. rubi) on cultivated and wild Rubus species in Finland and Sweden |
title_short |
Occurrence of Peronospora sparsa (P. rubi) on cultivated and wild Rubus species in Finland and Sweden |
title_full |
Occurrence of Peronospora sparsa (P. rubi) on cultivated and wild Rubus species in Finland and Sweden |
title_fullStr |
Occurrence of Peronospora sparsa (P. rubi) on cultivated and wild Rubus species in Finland and Sweden |
title_full_unstemmed |
Occurrence of Peronospora sparsa (P. rubi) on cultivated and wild Rubus species in Finland and Sweden |
title_sort |
occurrence of peronospora sparsa (p. rubi) on cultivated and wild rubus species in finland and sweden |
publisher |
Wiley |
publishDate |
2000 |
url |
http://dx.doi.org/10.1111/j.1744-7348.2000.tb00042.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1744-7348.2000.tb00042.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1744-7348.2000.tb00042.x |
genre |
Arctic Northern Sweden |
genre_facet |
Arctic Northern Sweden |
op_source |
Annals of Applied Biology volume 137, issue 2, page 107-112 ISSN 0003-4746 1744-7348 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1744-7348.2000.tb00042.x |
container_title |
Annals of Applied Biology |
container_volume |
137 |
container_issue |
2 |
container_start_page |
107 |
op_container_end_page |
112 |
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1799474385768153088 |