Sintomatologia da murcha de Ceratocystis fimbriata em eucalipto

Ferreira, F.A.; Maffia, Luiz A.; Barreto, Robert W.; Demuner, N. L.; Pigatto, Silvana

doi:10.1590/s0100-67622006000200001

Cited by 32 publications

(34 citation statements)

References 4 publications

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“…Later, in the radial direction, the fungus causes death of portions of the vascular cambium, phloem and phelloderm (Ferreira et al 2006). In this study, a higher fungal colonization resulted in reduced growth of trees in the field.…”

Section: Discussionmentioning

confidence: 59%

Impact of Ceratocystis wilt on eucalyptus tree growth and cellulose pulp yield

Máfia¹,

Ferreira

Zauza

et al. 2013

Forest Pathology

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In this study, we determined the effects of Ceratocystis fimbriata wilt on volumetric growth and cellulose pulp yield of eucalyptus. Sevenyear-old healthy and infected trees were separated into different classes of severity, and the individual volume of each whole tree with bark was determined. Volumetric losses were found regardless of the class of disease severity, resulting in reduction in volumetric growth of the trees from 65% to 87%, depending on the infection level. Two approaches were used for evaluating the effects of the disease on cellulose pulp yield: (i) evaluation of wood basic density and chemical composition, contents of ethanol/toluene extractives and Klason lignin, and the alkaline load and screen yield across Kraft pulping to kappa number 18 AE 0.5 for both healthy and discoloured materials; (ii) determination of the alkaline load and yield across Kraft pulping to kappa number 18 AE 0.5 of woods with different levels of discoloration (0, 25, 50, 75 and 100% of discoloured wood). Discoloured wood presented lower basic density, higher ethanol/toluene extractives and Klason lignin, higher alkaline load and lower pulp screened yield at kappa number 18 AE 0.5 compared with the healthy ones. Increasing the fraction of infected wood in chip furnishes resulted in proportionally increased alkaline load demand and decreased screen yields. Adding 50% of infected wood in the chip furnish resulted in 23.8% increase in the alkali load and 13.7% reduction in the pulp screen yield at kappa number 18 AE 0.5. The results obtained have proved that the disease reduces volumetric growth, increases wood consumption and reduces yield in eucalyptus pulp production.

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Section: Discussionmentioning

confidence: 59%

Impact of Ceratocystis wilt on eucalyptus tree growth and cellulose pulp yield

Máfia¹,

Ferreira

Zauza

et al. 2013

Forest Pathology

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“…The pathogen penetrates the plant through fresh lesions on the stem and roots and induces wilting, die-back, wood darkening, canker, and tree death (Ferreira et al 2006). The pathogen spreads into the host parenchyma tissue causing dark stripes at different heights of the stem and killing a portion of the vascular cambium, phloem and pheloderm.…”

Section: Introductionmentioning

confidence: 99%

“…The pathogen spreads into the host parenchyma tissue causing dark stripes at different heights of the stem and killing a portion of the vascular cambium, phloem and pheloderm. This results in longitudinal, continuous or interrupted lesions on the outer part of the trunk, causing tree wilting and death (Ferreira et al 2006). The existence of inter and intra-specific genetic variability for ceratocystis wilt resistance allows the use of resistant genotypes as the most efficient and economic method for the control of the disease .…”

Section: Introductionmentioning

confidence: 99%

Eucalyptus pellita as a source of resistance to rust, ceratocystis wilt and leaf blight

Guimarães¹,

Titon²,

Lau³

et al. 2010

CBAB

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-Rust (Puccinia psidii), ceratocystis wilt (Ceratocystis fimbriata) and cylindrocladium leaf blight (Cylindrocladium pteridis) are important diseases of eucalyptus. Planting of resistant genotypes is the most suitable control strategy of forest diseases under field condition. Resistance level of 23 Eucalyptus pellita clones was evaluated by artificial inoculations. Among the inoculated clones, 12 were resistant to rust, 16 to ceratocystis wilt and 12 to cylindrocladium leaf blight, and three of them were resistant to all three diseases. The high intra-specific variability found in this study demonstrates the importance of E. pellita as a disease resistance source to be employed for introgression of novel resistance genes in eucalyptus genetic breeding programs.

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“…Dark stripes originates from the medulla spread through the radial parenchyma up to different heights and may reach in the stem. The fungus also kills partially of the vascular cambium, the phloem and pheloderm, resulting in longitudinal, continuous or interrupted lesions on the outer part of the trunk, which cause tree wilting and death (FERREIRA et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Resistance to Ceratocystis Wilt (Ceratocystis fimbriata) in Parents and Progenies of Eucalyptus grandis x E. urophylla

et al. 2010

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Ceratocystis wilt, caused by Ceratocystis fimbriata, is one of the most damaging diseases in eucalyptus plantations worldwide. Although there are resistant genotypes, the genetic basis of resistance is still poorly understood. In this paper we studied the resistance level by a stem inoculation experiment of genotypes of Eucalyptus grandis and E. urophylla and estimated the heritability and gains of selection in families derived from controlled interspecific crosses. In both species, highly resistant as well as highly susceptible genotypes to Ceratocystis wilt were found. Out of 21 parents assessed, twelve were resistant and nine susceptible. Estimates of individual narrow (50 %) and broad (59 %) sense heritability suggested a high degree of genetic control and low allelic dominance of the trait. There was great genetic variation among and within families, a fact that contributes to high heritability and genetic gain. A genetic gain in lesion size of up to -74.4 % was obtained from selection of the 50 best clones in the evaluated families, i.e., the mean lesion length in the progeny population can be reduced by 74,4 %.

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Sintomatologia da murcha de Ceratocystis fimbriata em eucalipto

Cited by 32 publications

References 4 publications

Impact of Ceratocystis wilt on eucalyptus tree growth and cellulose pulp yield

Impact of Ceratocystis wilt on eucalyptus tree growth and cellulose pulp yield

Eucalyptus pellita as a source of resistance to rust, ceratocystis wilt and leaf blight

Resistance to Ceratocystis Wilt (Ceratocystis fimbriata) in Parents and Progenies of Eucalyptus grandis x E. urophylla

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