Relationships between soil factors, Quercus robur health, 
Collybia fusipes root infection and Phytophthora presence

Camy, Cécile; Delatour, Claude; Marçais, Benoît

doi:10.1051/forest:2003034

Cited by 23 publications

(22 citation statements)

References 22 publications

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“…These results agree with a previous study which showed that, at the plot scale, the severity of root damages induced by C. fusipes on Q. robur increased with an increase in soil sand content but decreased with the degree of waterlogging (Camy et al 2003a). Furthermore, our results are in agreement with those of different field surveys concerning Relative risk of decline associated with infection Fig.…”

Section: Discussionsupporting

confidence: 93%

Soil factors associated with infection by Collybia fusipes and decline of oaks

Camy¹,

Villebonne²,

Delatour³

et al. 2003

Forest Pathology

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Collybia fusipes is the cause of a root rot of oaks in Europe. Infection by the pathogen is site dependent and inconsistently correlated with crown deterioration. This study aimed at clarifying the relationship between soil factors and the impact of C. fusipes on tree health. The database of the Département de la Santé des Forêts, the forest health survey service, collected over the French forest during the last 12 years allowed us to perform a large scale study dealing with soil textures in which C. fusipes was reported to induce problems on Quercus robur and/or Q. petraea. Furthermore, a specific survey from 30 plots in north eastern France was carried out to determine which of the soil factors, such as texture, degree of waterlogging, presence and nature of a layer limiting rooting, carbon/nitrogen ratio, cation exchange capacity, or pH could be related to an increased risk of decline of pedunculate oaks infected by C. fusipes. The main results were that C. fusipes is preferentially distributed on coarse textured soils and that its negative impact on tree crown deterioration also increased with the soil sand content. 255Collybia fusipes, oak decline and soil factors 263 Collybia fusipes, oak decline and soil factors

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Section: Discussionsupporting

confidence: 93%

Soil factors associated with infection by Collybia fusipes and decline of oaks

Camy¹,

Villebonne²,

Delatour³

et al. 2003

Forest Pathology

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“…A lowering pH of the mineral soil is associated with reduction in fine-root growth and mycorrhizal development, higher nitrogen/cation ratios, and aluminium (Al) toxicity, and as a result, increased sensitivity of the root systems to environmental stress (Demchik and Sharpe 2000;Göttlein et al 1999). Low soil pH has been shown to benefit oak root pathogens (Camy et al 2003) and can, therefore, provide an indirect link between crown condition and secondary stress factors. However, the opposite may also hold true.…”

Section: Soil Ph and Tree Agementioning

confidence: 99%

Crown condition dynamics of oak in southern Sweden 1988’999

Drobyshev¹,

Anderson

Sonesson

2007

Environ Monit Assess

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Crown defoliation of oak (Quercus robur and Q. petraea) was analysed in 808 trees during three forest condition surveys (1988, 1993, and 1999) in the southern Sweden. From 1988 to 1999 crown defoliation increased by more than 20%. Changes in crown defoliation were related to the pH in the upper 20-30 cm of the mineral soils, which was closely connected to other measures of soil fertility (cation exchange capacity, CEC and C/N ratio). Trees growing on soils with a high pH (> or =4.00, in BaCl2 filtrate), high CEC and low C/N ratio had significantly lower crown defoliation than trees growing on more acid soils (pH <4.00), indicating that less favourable soil conditions may further enhance oak decline. Age did not differentiate trees with respect to crown defoliation, indicating that decline in crown condition was not due to an age-related increase in crown transparency. Considering only trees younger than 100 years, a significant interaction was observed between changes in crown defoliation and soil pH. Trees younger than 100 years old growing on more acidic soils had a greater increase in crown transparency than trees on more basic soils between 1988 and 1999. Trees > or =100 years old had significantly higher defoliation on more acidic than on more basic soils, however defoliation dynamics of these trees over 1988-99 was not related to soil acidity. Two biotic agents (insect and fungal leaf infections) evaluated in this study did not prove to be important drivers of defoliation dynamics.

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“…Agrilus spp. have been linked to root infections by Collybia fusipes and presence of Phytophthora in Q. robur [4] and have been suspected of transmitting pathogenic fungi from infected to healthy trees, which raised questions about their secondary role [20,30].…”

Section: Introductionmentioning

confidence: 99%

Predispositions and symptoms of Agrilus borer attack in declining oak trees

et al. 2004

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-This paper presents results of a semi-quantitative study on the role of Agrilus biguttatus F. in oak decline in Belgium. Larvae of this insect breed in living subcortical tissues of European oak. Several factors favouring attacks are discussed, among which the overall health condition and the local physical and biochemical status of the host tree. Larvae, feeding galleries, pupae, imago and D-shaped emergence-holes of A. biguttatus were observed exclusively in declining and recently dead oaks. Attacks start in the south-facing, sun-exposed parts of the subcrown stem, with a preference for thicker-barked trees or similar areas within declining trees. The feeding of early larval stages induces subcortical necrosis and longitudinal bark cracking. The more destructive tunnelling of advanced larval stages cuts functional vessels and phloem elements, which enhances the decline. In conclusion, effects on wood quality and suitable control options are discussed.

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Relationships between soil factors, Quercus robur health, Collybia fusipes root infection and Phytophthora presence

Cited by 23 publications

References 22 publications

Soil factors associated with infection by Collybia fusipes and decline of oaks

Soil factors associated with infection by Collybia fusipes and decline of oaks

Crown condition dynamics of oak in southern Sweden 1988’999

Predispositions and symptoms of Agrilus borer attack in declining oak trees

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