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Heart rot of spruce and alder in forests of Latvia

impact and possibilities for silvicultural control

Arhipova, Natalija (2012). Heart rot of spruce and alder in forests of Latvia. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2012:49
ISBN 978-91-576-7696-2
[Doctoral thesis]

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Heart rot causes great decrease in timber quality throughout the world. In the conifer forests of Northern Hemisphere the most significant losses are caused by fungi from the Heterobasidion annosum species complex. The spread of the disease is favored by forest management, as the fungus can use freshly cut stumps as an infection court, and so extend through root contacts to infect neighboring trees.

The country-scale inventory revealed that about 22% of Latvian spruce trees contained heart rot, which extended on average 6.6 m within the tree stem; the most commonly associated fungus being H. parviporum. These facts highlight the need to take actions to reduce the level of inoculum in already infested stands. Stump removal and the planting of resistant tree species are two options for that.

Long-term trials carried out in Scandinavia showed that stump removal could significantly decrease the proportion of infected trees in regenerated stands, although the effectiveness of this procedure may eventually decrease with time. In addition, this method is quite drastic and the adverse influence of continuous stump removal on stand biodiversity and productivity should be taken into consideration. The trail conducted in Finland showed that stump removal had a positive impact on seedlings growth, but influenced negatively mycorrhization and species richness.

The other management method which could be employed is the planting of resistant tree species, especially broadleaved trees. In the work undertaken for this thesis heart rot incidence, associated fungi and decay caused yield losses were studied in Latvian grey (Alnus incana) and black alder (A. glutinosa) stands. Despite the high decay incidence and the number of associated fungal species, no single H. annosum s.l. was found. Also, our data showed that the proportion and size of the heart rot column increased with tree age. These data suggest that a short rotation of fast growing broadleaved trees (not only Alnus, but also species of Populus, Betula, and Salix) could be used for clearing up the Heterobasidion inoculum.

Authors/Creators:Arhipova, Natalija
Title:Heart rot of spruce and alder in forests of Latvia
Subtitle:impact and possibilities for silvicultural control
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :25 October 2012
Number of Pages:48
I.Arhipova, N., Gaitnieks, T., Donis, J., Stenlid, J. & Vasaitis, R. (2011). Butt rot incidence, causal fungi, and related yield loss in Picea abies stands of Latvia. Canadian Journal of Forest Research 41: 2337-2345.
II.Cleary, M. R., Arhipova, N., Morrison, D. J., Thomsen, I. M., Sturrock, R. N., Vasaitis, R., Gaitnieks, T. & Stenlid, J. (2012) Stump removal to control root disease in Canada and Scandinavia: A synthesis of results from long-term trials. Forest Ecology and Management, in press
III.Menkis, A., Uotila, A., Arhipova, N. & Vasaitis, R. (2010). Effect of stump and slash removal on growth and mycorrhization of Picea abies seedlings outplanted on a forest clear-cut. Mycorrhiza 20(7): 505-509.
IV.Arhipova, N., Gaitnieks, T., Donis, J., Stenlid, J. & Vasaitis, R. (2011). Decay, yield loss and associated fungi in stands of grey alder (Alnus incana) in Latvia. Forestry 84(4): 337-348.
V.Arhipova, N., Gaitnieks, T., Donis, J., Stenlid, J. & Vasaitis, R. (2012) Heart-rot and associated fungi in Alnus glutinosa (L.) Gaertn. stands in Latvia. Scandinavian Journal of Forest Research, 27(4): 327-336.
Place of Publication:Uppsala
Publisher:Dept. of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-7696-2
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:H Protection of plants and stored products > H20 Plant diseases
K Forestry > K70 Forest injuries and protection
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Agrovoc terms:coniferous forests, alnus incana, alnus glutinosa, picea abies, root rots, wood decay, heterobasidion, disease resistance, stump removal, forestry operations, latvia
Keywords:decay incidence, Heterobasidion, Picea abies, Alnus, decay causing fungi, stump removal
Permanent URL:
ID Code:9094
Department:(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
(S) > Dept. of Forest Mycology and Plant Pathology
External funders:Swedish Energy Agency
Deposited By: Ms Natalija Arhipova
Deposited On:26 Sep 2012 08:03
Metadata Last Modified:02 Dec 2014 10:52

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