Disease development of Dothistroma needle blight in seedlings of Pinus sylvestris and Pinus contorta under Nordic conditions

2015 ◽  
Vol 46 (5) ◽  
pp. 515-521 ◽  
Author(s):  
H. Millberg ◽  
A. J. M. Hopkins ◽  
J. Boberg ◽  
K. Davydenko ◽  
J. Stenlid
Keyword(s):  
Pinus Sylvestris ◽  
Pinus Contorta ◽  
Disease Development ◽  
Dothistroma Needle Blight ◽  
Needle Blight

scholarly journals The host spectrum of Dothistroma needle blight Mycosphaerella pini E. Rostrup – new hosts of Dothistroma needle blight observed in theCzech Republic

2012 ◽  
Vol 52 (No. 1) ◽  
pp. 30-36 ◽  
Author(s):  
M. Bednářová ◽  
D. Palovčíková ◽  
L. Jankovský
Keyword(s):  
Czech Republic ◽  
Pinus Ponderosa ◽  
Pinus Banksiana ◽  
Pinus Contorta ◽  
Pinus Nigra ◽  
The Czech Republic ◽  
Christmas Trees ◽  
Dothistroma Needle Blight ◽  
Pinus Aristata ◽  
Needle Blight

Dothistroma needle blight Mycosphaerella pini E. Rostrup and its anamorphic stage Dothistroma septospora (Dorog.) Morelet was detected for the first time in the territory of the Czech Republic in a consignment of imported plants of Austrian pine Pinus nigra Arnold in 1999. In 2000, it was also found on Pinus nigra in an open planting in a plantation of Christmas trees by the village of Jedovnice near Brno in South Moravia. In the Czech Republic, Dothi-stroma needle blight was identified on 13 species of pine. Pinus nigra Arnold and Pinus mugo Turra are the most frequent hosts. In addition to these species, Dothistroma needle blight was observed on Pinus ponderosa Douglas ex Lawson, Pinus jeffreyi Grev. et Balf, Pinus banksiana Lamb., Pinus contorta Douglas, Pinus rotundata Link, Pinus leucodermis Ant. and Pinus sylvestris L. Finds on Pinus aristata Engelm., Pinus rigida Mill., Pinus heldreichii H. Christ. and Pinus cembra L. var. sibirica (Du Tour) G. Don. are a certain rarity. These species are not mentioned anywhere as potential hosts of Dothistroma needle blight. As for the species of other genera Picea pungens Engelm., Picea abies L. Karst. and last but not least Picea schrenkiana Fisch. & C. A. Mey were also observed as hosts. The host range of Dothistroma needle blight recorded in papers is noted as well.

The outbreak history of Dothistroma needle blight: an emerging forest disease in northwestern British Columbia, Canada

2009 ◽  
Vol 39 (12) ◽  
pp. 2505-2519 ◽  
Author(s):  
Cedar Welsh ◽  
Kathy Lewis ◽  
Alex Woods
Keyword(s):  
British Columbia ◽  
Environmental Conditions ◽  
Pinus Contorta ◽  
Native Forest ◽  
Pine Trees ◽  
Environmental Trigger ◽  
History Of ◽  
Current Outbreak ◽  
Dothistroma Needle Blight ◽  
Needle Blight

Native pathogens are normally limited in the damage they cause by host resistance and (or) environmental conditions that limit one or more phases of the disease cycle. Changes to host or environmental conditions can relax these limits and result in disease emergence. Until recently, Dothistroma needle blight (Dothistroma), caused by Dothistroma septosporum (Dorog.) Morelet, has had only minor impacts on native forest trees in western North America. Over the past decade in the forests of northwestern British Columbia, Canada, Dothistroma has caused extensive mortality in managed plantations of lodgepole pine ( Pinus contorta Dougl. ex Loud. var. latifolia Engelm.), and even mature pine trees are succumbing. We used dendrochronological techniques to reconstruct the temporal patterns of past Dothistroma outbreaks in the area using tree-ring series from sites with documented outbreaks. We found that Dothistroma outbreaks in northwest British Columbia have occurred periodically over the last 174 years, with an increase in outbreak incidence and extent since the 1940s. The most distinct change observed in the outbreak history has been the greater severity and synchrony among the sites affected during the current outbreak. A recently observed climate change trend over the study area may represent an environmental trigger that synchronized the current outbreak causing the widespread emergence of the disease.

scholarly journals Warmer and wetter might not be better

2014 ◽  
Vol 60 (No. 11) ◽  
pp. 484-486 ◽  
Author(s):  
A.J. Woods
Keyword(s):  
Native Species ◽  
Pinus Contorta ◽  
Forest Health ◽  
Blister Rust ◽  
Host Trees ◽  
Host Pathogen ◽  
Primary Driver ◽  
Dothistroma Needle Blight ◽  
Dothistroma Septosporum ◽  
Needle Blight

As the climate continues to change, gaps in our understanding of how the altered environment will affect forest hosts and their pathogens widen. In some areas pathogens thought to be present for centuries are changing their behaviour. Dothistroma needle blight caused by the fungus Dothistroma septosporum in northwest British Columbia (BC), Canada, is a good example. In this area both the pathogen and the host, lodgepole pine (Pinus contorta var. latifolia), are considered native species, but here Dothistroma has been responsible for killing mature host trees, which is unprecedented. A plausible link between warmer, wetter summers and directional climate change has been suggested as the primary driver. Those environmental conditions appear to be affecting the host/pathogen relationship for other diseases in the neighbouring central interior of BC including comandra blister rust (Cronartium comandrae). Disrupted host/pathogen relationships tend to favour the short-lived more adaptable pathogens rather than their long-lived hosts. These changes in forest health have not been well accounted for in fields of forest science that have been built on stability and predictability.    

Forest health and climate change: A British Columbia perspective

2010 ◽  
Vol 86 (4) ◽  
pp. 412-422 ◽  
Author(s):  
Alex J. Woods ◽  
Don Heppner ◽  
Harry H. Kope ◽  
Jennifer Burleigh ◽  
Lorraine Maclauchlan
Keyword(s):  
Climate Change ◽  
British Columbia ◽  
Mountain Pine Beetle ◽  
Forest Health ◽  
Forest Insects ◽  
Pine Beetle ◽  
The World ◽  
Dothistroma Needle Blight ◽  
Management Recommendations ◽  
Needle Blight

BC’s forests have already faced two simultaneous, globally significant, epidemics linked to climate change; the Dothistroma needle blight epidemic in NW BC and the massive mountain pine beetle epidemic throughout the BC Interior. Building on these experiences, we have compiled our best estimates of how we believe other forest health agents may behave as climate change continues to influence our forests. We have drawn on literature from around the world but have focused on the situation in BC. We have made management recommendations based on what we have seen so far and what we expect to come.Key words: climate change, forest health, forest insects, forest pathogens, forest management, British Columbia

scholarly journals Worldwide Genetic Structure Elucidates the Eurasian Origin and Invasion Pathways of Dothistroma septosporum, Causal Agent of Dothistroma Needle Blight

2021 ◽  
Vol 7 (2) ◽  
pp. 111
Author(s):  
Martin S. Mullett ◽  
Rein Drenkhan ◽  
Kalev Adamson ◽  
Piotr Boroń ◽  
Anna Lenart-Boroń ◽  
...  
Keyword(s):  
Eastern Europe ◽  
Causal Agent ◽  
Ancestral Population ◽  
Economic Damage ◽  
Invasion Pathways ◽  
Western Asia ◽  
Dothistroma Needle Blight ◽  
Migration Pathways ◽  
Dothistroma Septosporum ◽  
Needle Blight

Dothistroma septosporum, the primary causal agent of Dothistroma needle blight, is one of the most significant foliar pathogens of pine worldwide. Its wide host and environmental ranges have led to its global success as a pathogen and severe economic damage to pine forests in many regions. This comprehensive global population study elucidated the historical migration pathways of the pathogen to reveal the Eurasian origin of the fungus. When over 3800 isolates were examined, three major population clusters were revealed: North America, Western Europe, and Eastern Europe, with distinct subclusters in the highly diverse Eastern European cluster. Modeling of historical scenarios using approximate Bayesian computation revealed the North American cluster was derived from an ancestral population in Eurasia. The Northeastern European subcluster was shown to be ancestral to all other European clusters and subclusters. The Turkish subcluster diverged first, followed by the Central European subcluster, then the Western European cluster, which has subsequently spread to much of the Southern Hemisphere. All clusters and subclusters contained both mating-types of the fungus, indicating the potential for sexual reproduction, although asexual reproduction remained the primary mode of reproduction. The study strongly suggests the native range of D. septosporum to be in Eastern Europe (i.e., the Baltic and Western Russia) and Western Asia.

Breeding against dothistroma needle blight of radiata pine in Australia

2010 ◽  
Vol 40 (8) ◽  
pp. 1653-1660 ◽  
Author(s):  
Miloš Ivković ◽  
Brian Baltunis ◽  
Washington Gapare ◽  
Jo Sasse ◽  
Gregory Dutkowski ◽  
...  
Keyword(s):  
Significant Proportion ◽  
Radiata Pine ◽  
Age And Growth ◽  
Phenotypic Correlation ◽  
Residual Variance ◽  
Narrow Sense Heritability ◽  
Economic Analyses ◽  
Dothistroma Needle Blight ◽  
Pinus Spp ◽  
Needle Blight

Pine needle blight, caused by Dothistroma septosporum (Dorog.) M. Morelet, is one of the most serious foliar diseases of Pinus spp. in Australia and New Zealand. In 16 Pinus radiata (D.Don.) progeny trials in northeastern Victoria, Australia, Dothistroma-caused defoliation varied widely among trials and assessment years, ranging from 5% to 65%. The estimated narrow sense heritability ranged from nonsignificant to as high as 0.69 with a median of 0.36. Spatial autocorrelation of residuals accounted for a significant proportion of residual variance, and that increased heritability estimates. Genetic correlation between defoliation scores at an early age and growth at a later age was negative with a median value of –0.39. Phenotypic correlation between defoliation and survival was low and negative with a median value of –0.11. Economic analyses indicated that at sites with a high risk of infection, the effect of reducing defoliation on profitability was comparable with that of increasing growth at sites free from infection. The genetic parameters and economic impacts of Dothistroma were used to derive selection indices and include resistance to defoliation into the current breeding objective for radiata pine.

scholarly journals New data on the spread of the invasive species Dothistroma septosporum (Dorogin) M. Morelet in Belarus

2021 ◽  
Vol 66 (2) ◽  
pp. 147-158
Author(s):  
L. A. Golovchenko ◽  
N. G. Dishuk ◽  
S. V. Panteleev ◽  
O. Yu. Baranov
Keyword(s):  
Invasive Species ◽  
Molecular Genetic ◽  
Botanical Garden ◽  
Pine Trees ◽  
The Republic ◽  
Forest Nurseries ◽  
Dothistroma Needle Blight ◽  
Dothistroma Pini ◽  
Dothistroma Septosporum ◽  
Needle Blight

Red band needle blight, or Dothistroma needle blight is one of the most common and harmful diseases of pine. The causative agents of the disease are pathogenic micromycetes Dothistroma septosporum (Dorogin) M. Morelet and Dothistroma pini Hulbary. Dothistroma needle blight was firstly detected in Belarus in 2012 year, but till now information about this disease in the republic is fragmentary. The article presents the results of a survey of different pine trees, carried out in the period 2016–2020 years in botanical and dendrological gardens, forest nurseries and mini-arboretums at forestry enterprises, urban stands, nurseries of decorative plants, garden centers, for the presence of Dothistroma needle blight. The species identification of the causative agent of the disease was carried out by mycological and molecular genetic methods. In this study, Dothistroma needle blight was revealed on individual trees of Pinus mugo, P. nigra and P. ponderosa in the stands of the Central Botanical Garden of the NAS of Belarus, the dendrological garden of the Glubokoe experimental forestry enterprise, in the nurseries of decorative plants in the Grodno and Minsk regions. In the collected samples of needles, the invasive species Dothistroma septosporum was identified. The frequency of occurrence of the pathogen was 4.8–7.2 %, the proportion of observation sites in which this disease was detected at 60 %. The detection of Dothistroma needle blight on pine trees, mainly on planting material imported from abroad, indicates a transboundary route of D. septosporum entering the country. Analysis of literature data indicates the potential danger of Dothistroma needle blight for pine stands in the republic, which in turn requires the organization of regular monitoring of the disease and the development of methods to limit the spread of D. septosporum in the republic.

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