Scleroderris canker of Todo-fir in Hokkaido, Northern Japan.

Yokota, Shun-ichi

doi:10.1111/j.1439-0329.1975.tb00928.x

Cited by 23 publications

(4 citation statements)

References 4 publications

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“…LAFLAMME 1991). YOKOTA et al (1974) andTANAKA (1988) also observed positive relationships between the incidence of G. abietina and snow depth, and MAROSY et al (1989) stated that a deep snow cover enabled the fungus to colonize host tissue regardless of the ambient air temperature. MAROSY et al (1989) found that at least 50 days with daytime air temperatures between )6°C and 5°C were necessary for symptoms to develop.…”

Section: Discussionmentioning

confidence: 99%

Formation and growth of stem cankers caused by Gremmeniella abietina on young Pinus contorta

Witzell

2001

Forest Pathology

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From 1990 to 1995, the formation and growth of stem cankers caused by Gremmeniella abietina on Pinus contorta var. latifolia was studied in three stands in northern Sweden. The stands were planted in 1976±80. The total number of cankers on 756 trees that were individually followed increased from 233 to 477 during the 5-year period. With 42.0% of the cankers, the pathogen entered through or from the base of diseased branches, and 33.6% through visually undamaged bark. Most of the cankers were within 100 cm of the ground. In one of the three areas, the cankers were evenly distributed within 180 cm of the ground. The frequency of cankers facing north exceeded those facing south. The average vertical length of cankers had increased, 55.6% of cankers had increased their percentage coverage of the stem girth; 13.8% had fully girdled the stem. At two of the sites, there was a negative correlation between canker coverage of the stem circumference and tree height increment.

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Section: Discussionmentioning

confidence: 99%

Formation and growth of stem cankers caused by Gremmeniella abietina on young Pinus contorta

Witzell

2001

Forest Pathology

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“…The infection, which is caused by the fungus Gremmeniella abietina (anamorph Brunchorstia pinea), can lead to the weakening and death of these trees. So far, no large-scale epidemic outbreaks caused by this pathogen have been recorded in Spain, but the devastation of huge areas of Pinus, Picea or Abies stands has been reported in other parts of the world (Yokota, 1975;Laflamme & Lachance, 1987;Kaitera et al, 1998). This fungus was divided into three races: European, North American and Asian (Dorworth & Krywienczyk, 1975).…”

Section: Introductionmentioning

confidence: 99%

Aleppo pine provenances vary in susceptibility and secondary chemical response toGremmeniella abietinainfection

Romeralo

Witzell

2015

Plant Pathology

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Aleppo pine is a thermophilic species that has become a popular tree species in plantings even beyond its natural habitat. In 1999 the pathogenic fungus Gremmeniella abietina was isolated for the first time in Aleppo pine plantations in Spain. The main objective of this study was to analyse the variation in susceptibility to G. abietina (European race, biotype A) infections among trees from five Aleppo pine provenances. Artificial inoculations were performed at two different times in January 2012. The susceptibility of the trees was evaluated by recording disease severity and the length of internal stem necrosis produced by the pathogen. In addition, the concentrations of two flavanone compounds were quantified as putative indicators of resistance. Provenances and G. abietina isolates both significantly affected levels of necrosis although the results were dependent on the time of inoculation. There was a relationship between provenance and resistance, with trees of higher elevation provenances being more susceptible to disease than trees of lower elevation provenances. The amount of naringenin flavanone from trees was significantly different between provenances, suggesting that it is a possible indicator value for resistance. Conversely, no differences were found in the concentration of eriodictyol in trees between provenances. The results show that the provenance‐dependent variation in the susceptibility of Aleppo pine to G. abietina should be considered in selection of seed sources for restoration.

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“…causes stem canker and shoot blight on several conifer species (Donaubauer 1972). The pathogen has been responsible for the destruction of many conifer plantations in North and Central Europe, North America and Japan in the recent decades (Yokota 1975;Dorworth 1979;Jalkanen 1992, 1994). Three races, the Asian, European (EU) and North American race, have been distinguished within G. abietina var.…”

Section: Introductionmentioning

confidence: 99%

Physiological and morphological variation of Gremmeniella abietina from Spain

Santamaría¹,

Pajares²

2004

Forest Pathology

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Gremmeniella abietina isolated from Pinus halepensis in Spain was characterized based on disease symptoms and conidia morphology. The disease symptoms, which became more evident in the spring, included drying up of needles and branches with some distortion of terminal twigs, resulting in dieback and sometimes to death of trees of all sizes. Variation in conidia size and growth rate was investigated between 15 isolates from Spain, and the conidia morphology was compared with four isolates from Finland, four from Switzerland and three from the US. Great variation occurred between Spanish isolates both in growth rates and in conidia size. The growth rates of the isolates were greatest on malt agar amended with pine needle extract and at 15°C. The length and the width of the conidia of the isolates from Spain ranged between 10.7-44.8 and 1.5-4.4 lm, and most of them had three septa. The results suggest that the isolates from Spain do not belong to the Alpine biotype, and the disease symptoms caused by these isolates resembled those of the European biotype.

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Scleroderris canker of Todo-fir in Hokkaido, Northern Japan.

Cited by 23 publications

References 4 publications

Formation and growth of stem cankers caused by Gremmeniella abietina on young Pinus contorta

Formation and growth of stem cankers caused by Gremmeniella abietina on young Pinus contorta

Aleppo pine provenances vary in susceptibility and secondary chemical response toGremmeniella abietinainfection

Physiological and morphological variation of Gremmeniella abietina from Spain

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