Insect and fungal damage to young eucalypt trial plantings in northern New South Wales

Stone, Christine; Simpson, Jane; Eldridge, R. H.

doi:10.1080/00049158.1998.10674711

Cited by 40 publications

(15 citation statements)

References 13 publications

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“…A serious impediment to plantation expansion with CCV is Quambalaria shoot blight (QSB) , which is typically caused by the fungus Quambalaria pitereka (Pegg et al 2009a). This disease has led to significant damage in young (less than 5 years old) spotted gum field trials and plantations in QLD and in northern New South Wales (Lawson et al 2008;Carnegie 2007b;Dickinson et al 2004;Self et al 2002;Stone et al 1998). Infection of CCV by Q. pitereka leads to losses in leaf area and negatively affects stem form, which in turn negatively impact growth and timber quality many years after infection (Pegg et al , 2009bJohnson et al 2009).…”

Section: Introductionmentioning

confidence: 94%

Relationships between early growth and Quambalaria shoot blight tolerance in Corymbia citriodora progeny trials established in Queensland, Australia

Brawner

Lee

Hardner

et al. 2011

Tree Genetics & Genomes

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The fungal pathogen Quambalaria pitereka can cause significant damage to spotted gum (Corymbia sp.) plantations in Australia. A series of seven progeny trials, involving seed from a range-wide collection from 527 individuals within 25 native populations of Corymbia citriodora sub-species variegata, were assessed for height growth and damage from Quambalaria around 1 year after planting. Infection at this young age has been found to detrimentally impact growth, form, and wood quality for many years. Genetic variance was found to be significant at both the provenance and family level. However, selection of families within provenances should lead to greater levels of genetic gain than what can be realized from selecting among provenances as estimates of additive genetic variance were consistently greater than estimates of variance among populations. Strong relationships between height and Quambalaria shoot blight (QSB) damage assessments in these trials were evidenced by very high genetic correlations between the traits; therefore, selection for any of these traits could be used to identify more productive and QSB-tolerant populations. While both provenances and families were found to interact with the trial environments at a similar level across traits, genetic correlations indicated that rankings for growth were be less stable than rankings for QSB tolerance across environments. Genetic parameter estimates derived from general and generalized linear models were very similar and either analytical method could be used to evaluate fungal damage.

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Section: Introductionmentioning

confidence: 94%

Relationships between early growth and Quambalaria shoot blight tolerance in Corymbia citriodora progeny trials established in Queensland, Australia

Brawner

Lee

Hardner

et al. 2011

Tree Genetics & Genomes

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“…The impact of infection on growth was found to be a reduction in height increment with increasing severity of Q. pitereka infection. Stone et al (1998) also found that all species and provenances of spotted gum used in trial sites in New South Wales suffered repeated infections by Q. pitereka, resulting in a significant loss of height increment and stem form. An increase in apical branching on trees that had suffered from Quambalaria shoot blight was also noted.…”

Section: Introductionmentioning

confidence: 99%

Potential gains through selecting for resistance in spotted gum to Quambalaria pitereka

Pegg

Shuey²,

Carnegie³

et al. 2011

Australasian Plant Pathol.

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Quambalaria shoot blight, caused by the fungus Quambalaria pitereka, is a serious disease affecting the expanding eucalypt plantation estate in subtropical and tropical eastern Australia. Trees that are severely infected are often multi-stemmed and stunted and infection of young trees may give rise to poor form in mature trees. A spotted gum clonal trial provided the opportunity to investigate the impact of the disease on tree growth and factors influencing tree architecture (tree form), which affects wood quality. We measured the effect that Q. pitereka infection during plantation establishment (up to 6 months old) has on growth and tree architecture and productivity to age 3 years. Our results show that the pathogen has a significant impact on trees at plantation establishment, which results in a negative impact on wood quality, potentially reducing merchantable value at final harvest. Tree growth and form was significantly improved where germplasm with low susceptibility to Q. pitereka infection was used.

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“…A common strategy used in breeding programs is to identify resistant parents within the centre of origin of the tree. Stone et al (1998) observed variation in susceptibility of spotted gum to Q. pitereka with a provenance originating from Warwick, an inland region of Queensland, suffering two to four times more damage by Q. pitereka than a C. variegata provenance from a more coastal location near Coffs Harbour in NSW. It was suggested that seed provenance may be an indicator for resistance (Stone et al 1998).…”

Section: Introductionmentioning

confidence: 93%

“…Stone et al (1998) observed variation in susceptibility of spotted gum to Q. pitereka with a provenance originating from Warwick, an inland region of Queensland, suffering two to four times more damage by Q. pitereka than a C. variegata provenance from a more coastal location near Coffs Harbour in NSW. It was suggested that seed provenance may be an indicator for resistance (Stone et al 1998). Dickinson et al (2004) reported on the assessment of 28 different provenances of C. citriodora, C. variegata and C. henryi across 22 sites located in areas with mean average rainfall (MAR) ranging from 690 to 1,320 mm per year.…”

Section: Introductionmentioning

confidence: 93%

“…Spotted gum tree improvement programs in NSW and Queensland are focused on C. variegata and on hybrids between C. torelliana and species of spotted gum specifically in Queensland (Lee 2007;Smith et al 2007;Lee et al 2009). Many of these trials have included assessments for resistance to Q. pitereka (Stone et al 1998;Self et al 2002;Dickinson et al 2004;Smith et al 2007;Johnson et al 2009;Lee et al 2009, Lan et al 2010.…”

Section: Introductionmentioning

confidence: 99%

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Variable resistance to Quambalaria pitereka in spotted gum reveal opportunities for disease screening

Pegg

Carnegie²,

Wingfield

et al. 2010

Australasian Plant Pathol.

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Quambalaria shoot blight, caused by the fungus Quambalaria pitereka, is a serious disease affecting the development of spotted gum (Corymbia citriodora subsp. citriodora, C. citriodora subsp. variegata, C. henryi and C. maculata) plantations in subtropical and tropical Australia. Incorporation of screening for resistance to Q. pitereka into current breeding programs is essential for the future development of plantations using spotted gum and Corymbia hybrids. The aim of this study was to determine whether there is variability in resistance among and within different species provenances and families of spotted gum to infection by Q. pitereka. A secondary aim was to consider whether the origin of seed source is a significant indicator of resistance to Q. pitereka. Assessments were conducted in trials consisting of spotted gum provenances, families and clones, all at the same site with high levels of disease pressure and with optimum climatic conditions for disease development. While all species and provenances of spotted gum could be infected by Q. pitereka, results showed that there are high levels of variability in resistance between and within species, provenances and families, indicating the potential to select for disease resistance. Provenance was shown to be an unreliable indicator of resistance to Q. pitereka.

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Insect and fungal damage to young eucalypt trial plantings in northern New South Wales

Cited by 40 publications

References 13 publications

Relationships between early growth and Quambalaria shoot blight tolerance in Corymbia citriodora progeny trials established in Queensland, Australia

Relationships between early growth and Quambalaria shoot blight tolerance in Corymbia citriodora progeny trials established in Queensland, Australia

Potential gains through selecting for resistance in spotted gum to Quambalaria pitereka

Variable resistance to Quambalaria pitereka in spotted gum reveal opportunities for disease screening

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