Damage and Loss Due to Ceratocystis fimbriata in Eucalyptus Wood for Charcoal Production

Fernandes, Bianca Vique; Zanuncio, Antônio José Vinha; Furtado, Edson Luiz; Andrade, H. B.

doi:10.15376/biores.9.3.5473-5479

Cited by 15 publications

(13 citation statements)

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“…The basic density of the materials tested, ranged from 0.359 to 0.628 g/cm 3 , similar to that of E. urophylla and Eucalyptus paniculata, between 0.390 and 0.653 g/cm 3 (SETTE JR et al, 2012;ZANUNCIO et al, 2014b;FERNANDES et al, 2014).…”

Section: Relationship Between Basic Density and Moisturementioning

confidence: 86%

Artificial Neural Networks as a New Tool for Assessing and Monitoring Wood Moisture Content

et al. 2016

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-Drying of wood is necessary for its use and moisture control is important during this process. The aim of this study was to use artificial neural networks to evaluate and monitor the wood moisture content during drying. Wood samples of 2 × 2 × 4 cm were taken at 1.3 m above the ground, outside of radial direction, from seven 2-year-old materials and three 7-year-old materials. These samples were saturated and drying was evaluated until the equilibrium moisture content, then, the artificial neural networks were created. The materials with higher initial moisture reached equilibrium moisture content faster due to its higher drying rate. The basic density of all wood materials was inversely proportional at the beginning and directly proportional to the moisture at the end of drying. All artificial neural networks used in this work showed high accuracy to estimate the moisture, however, the neural network based on the basic density and drying days was the best. Therefore, artificial neural networks can be used to control the moisture content of wood during drying.Keywords: Eucalyptus urophylla × Eucalyptus grandis; Drying; Modeling.REDES NEURAIS ARTIFICIAIS COMO NOVA FERRAMENTA PARA AVALIAÇÃO E MONITORAMENTO DA UMIDADE DA MADEIRA RESUMO -A secagem da madeira é necessária para sua utilização e o controle da umidade é fundamental durante este processo. O objetivo deste trabalho foi utilizar redes neurais artificiais para avaliar e monitorar a umidade da madeira durante a secagem. Amostras de 2 x 2 x 4 cm foram retiradas a 1,3 metros acima do solo na parte externa no sentido radial de sete materiais de dois anos e três de sete anos de Eucalyptus urophylla x Eucalyptus grandis. Essas amostras foram saturadas e sua secagem avaliada até a umidade de equilíbrio, logo após, foram criadas as redes neurais artificiais. Os materiais com maior umidade inicial atingiram a umidade de equilíbrio mais rápido, devido a maior taxa de secagem. A densidade básica da madeira de todos os materiais foi inversamente proporcional no inicio e diretamente proporcional à umidade no final da secagem. A rede neural artificial baseada na densidade básica e nos dias de secagem apresentou alta precisão para avaliar e monitorar a umidade da madeira. Portanto, as redes neurais artificiais podem ser utilizadas para controle da umidade da madeira durante a secagem.Palavras-chave: Eucalyptus urophylla × Eucalyptus grandis; Modelagem; Secagem. 544Revista Árvore, Viçosa-MG, v.40, n.3, p.543-549, 2016 ZANUNCIO, A.J.V. et al.

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Section: Relationship Between Basic Density and Moisturementioning

confidence: 86%

Artificial Neural Networks as a New Tool for Assessing and Monitoring Wood Moisture Content

et al. 2016

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“…Along with the continued expansion of planted areas, many diseases have emerged causing economic losses, particularly those caused by pathogenic fungi (Alfenas et al 2009). Among these, Ceratocystis wilt caused by Ceratocystis fimbriata Ellis and Halsted is currently one of the most important diseases that affect Eucalyptus plantations in Brazil (Fernandes et al 2014).…”

Section: Introductionmentioning

confidence: 99%

QTL mapping for resistance to Ceratocystis wilt in Eucalyptus

Rosado

Guimarães

Faria

et al. 2016

Tree Genetics & Genomes

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Ceratocystis wilt caused by the fungus Ceratocystis fimbriata, is currently one of the major diseases in commercial plantations of Eucalyptus trees in Brazil. Deployment of resistant genotypes has been the main strategy for effective disease management. The present study aimed at identifying genomic regions underlying the genetic control of resistance to Ceratocystis wilt in Eucalyptus by quantitative trait loci (QTL) mapping in an outbred hybrid progeny derived from a cross between (Eucalyptus dunnii × Eucalyptus grandis) × (Eucalyptus urophylla × Eucalyptus globulus). A segregating population of 127 individuals was phenotyped for resistance to Ceratocystis wilt using controlled inoculation under a completely randomized design with five clonal replicates per individual plant. The phenotypic resistance response followed a continuous variation, enabling us to analyze the trait in a quantitative manner. The population was genotyped with 114 microsatellite markers and 110 were mapped with an average interval of 12.3 cM. Using a sib-pair interval-mapping approach five QTLs were identified for disease resistance, located on linkage groups 1, 3, 5, 8, and 10, and their estimated individual heritability ranged from 0.096 to 0.342. The QTL on linkage group 3 overlaps with other fungal disease-resistance QTLs mapped earlier and is consistent with the annotation of several disease-resistance genes on this chromosome in the E. grandis genome. This is the first study to identify and attempt to quantify the effects of QTLs associated with resistance to Ceratocystis wilt in Eucalyptus.

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“…The fungus then colonizes the vascular system, which obstructs the raw sap flow and disease development is associated with wood discoloration in the form of dark spots, wilting and leaf yellowing, as well as to canker (TUMURA et al, 2012;FERREIRA et al, 2013). Thus, tree growth is significantly reduced (MAFIA et al, 2013;FERNANDES et al, 2014), and can culminate in tree death.…”

Section: Introductionmentioning

confidence: 99%

“…Although there is information about how C. fimbriata damages forest plantations, studies about changes in the quality of infected wood are scarce (MAFIA et al, 2013;FERNANDES et al, 2014). Thus, the objective of this work was to evaluate the properties of teak wood infected by C. fimbriata and in different radial positions.…”

Section: Introductionmentioning

confidence: 99%

PROPERTIES OF TEAK WOOD INFECTED BY Ceratocystis fimbriata

Silva

Cruz

Pereira

et al. 2021

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In Brazil, the growth of Tectona grandis (teak) plantations is accompanied by an increased incidence of Ceratocystis wilt, a fungal disease that colonizes the vascular system of such tree. The objective of this work was to evaluate the properties of teak wood infected with Ceratocystis fimbriata at different radial positions. Ten 17-year-old trees (five infected and five healthy) were collected. A disk was removed from the base of each tree to determine Janka hardness, basic density, anatomical analysis, colorimetric parameters in the CIEL*a*b* system and sodium hydroxide solubility (NaOH). There were no significant differences for radial position and health for basic density and Janka hardness of the wood, with mean values of 0.488 g.cm3 and 58.66 MPa, respectively. The deposition of dark compounds was observed inside the parenchyma cells and fibers, as well as the formation of tyloses in the sapwood. Yellow pigment was predominant in the color formation of teak wood, which was influenced by radial position, with the sapwood being lighter. Regarding C. fimbriata infection, the color change was more evident in sapwood. Conversely, the NaOH solubility was lower for the sapwood attacked by the fungus. In conclusion, the changes in teak wood infected by C. fimbriata are visual and the anatomical structures do not deteriorate.

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Damage and Loss Due to Ceratocystis fimbriata in Eucalyptus Wood for Charcoal Production

Cited by 15 publications

References 15 publications

Artificial Neural Networks as a New Tool for Assessing and Monitoring Wood Moisture Content

Artificial Neural Networks as a New Tool for Assessing and Monitoring Wood Moisture Content

QTL mapping for resistance to Ceratocystis wilt in Eucalyptus

PROPERTIES OF TEAK WOOD INFECTED BY Ceratocystis fimbriata

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