Mundulla Yellows disease of eucalypts: descriptors and preliminary studies on distribution and etiology

Hanold, D.; Gowanlock, D. H.; Stukely, M.; Habili, Nuredin; Randles, J. W.

doi:10.1071/ap06013

Cited by 10 publications

(18 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Phytoplasma australasia was proposed (White et al, 1998) to include the phytoplasma associated with papaya yellow crinkle and papaya mosaic (as well as tomato big bud) but later revised to “Ca. australasiae” (to include the papaya-associated phytoplasmas but not TBB; Firrao et al, 2005) .b Davis and Sinclair (1998) moved the AGY phytoplasma from the 16SrI group into the stolbur group (16SrXII) and designated it subgroup B .c Constable et al (2003) reported a close relationship to 16Sr I. Zhao and Davis (2016) subsequently placed this into a new group: 16SrXXIII .d Zhao and Davis (2016) placed this into this new group and potentially a new “Ca. Phytoplasma” species .…”

Section: Introductionmentioning

confidence: 99%

Phytoplasmas–The “Crouching Tiger” Threat of Australian Plant Pathology

et al. 2017

View full text Add to dashboard Cite

Phytoplasmas are insect-vectored bacteria that cause disease in a wide range of plant species. The increasing availability of molecular DNA analyses, expertise and additional methods in recent years has led to a proliferation of discoveries of phytoplasma-plant host associations and in the numbers of taxonomic groupings for phytoplasmas. The widespread use of common names based on the diseases with which they are associated, as well as separate phenetic and taxonomic systems for classifying phytoplasmas based on variation at the 16S rRNA-encoding gene, complicates interpretation of the literature. We explore this issue and related trends through a focus on Australian pathosystems, providing the first comprehensive compilation of information for this continent, covering the phytoplasmas, host plants, vectors and diseases. Of the 33 16Sr groups reported internationally, only groups II, XI, XII, XXIII, XXV, and XXXIII have been recorded in Australia and this highlights the need for ongoing biosecurity measures to prevent the introduction of additional pathogen groups. Many of the phytoplasmas reported in Australia have not been sufficiently well studied to assign them to 16Sr groups so it is likely that unrecognized groups and sub-groups are present. Wide host plant ranges are apparent among well studied phytoplasmas, with multiple crop and non-crop species infected by some. Disease management is further complicated by the fact that putative vectors have been identified for few phytoplasmas, especially in Australia. Despite rapid progress in recent years using molecular approaches, phytoplasmas remain the least well studied group of plant pathogens, making them a “crouching tiger” disease threat.

show abstract

Section: Introductionmentioning

confidence: 99%

Phytoplasmas–The “Crouching Tiger” Threat of Australian Plant Pathology

et al. 2017

View full text Add to dashboard Cite

show abstract

“…2006). We have excluded the localities given in Hanold et al. (2006) because it is now clear that they include records of disorders other than MY (Parsons & Uren 2007).…”

mentioning

confidence: 99%

“…The initial detailed research was by a team who believed strongly that MY was a new, rapidly spreading, highly contagious, biotic disease at the initial phase of an epidemic with the potential to devastate natural vegetation and cause ‘irreversible loss of ancient iconic eucalypts’ (Hanold et al. 2002, 2006).…”

mentioning

confidence: 99%

“…Other roadside occurrences of MY may be associated with the widespread use of burnt lime (CaO) in roadmaking. Although asymmetric yellowing on single plants with MY has been used as evidence of a biotic agent (Hanold et al. 2006), it is now clear that this can be caused by variability in abiotic soil factors beneath single trees related to the location of added limestone and its low mobility as measured in ‘symptomatic’ soils by Czerniakowski et al.…”

mentioning

confidence: 99%

“…For example, the foliar concentrations of phosphorus in both symptomatic and asymptomatic trees are low rather than abnormally high (Czerniakowski et al. (2006); Hanold et al. (2006).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Is Mundulla Yellows really a threat to undisturbed native vegetation? A comment

Parsons

Uren

2011

Ecological Management &Amp; Restoration

View full text Add to dashboard Cite

Summary The term Mundulla Yellows (MY) was coined in 1997 to refer to a dieback disorder involving leaf chlorosis which affects Eucalyptus and other native southern Australian vascular plants. It was thought to be a new, spreading, contagious biotic disease with the potential to devastate native vegetation. Since then, research has found no evidence to confirm any role of biotic agents and generally the disorder has been more convincingly attributed to abiotic soil factors. It has now been suggested that most or all of the reported cases of MY are simply the very well‐known nutrient disorder of alkaline soils, lime‐induced chlorosis. All of the well‐documented records of MY are from sites where acidic soils have become more alkaline because of the use of crushed limestone in road‐making or to the use of alkaline irrigation water; none are from undisturbed native vegetation. Despite this research and much circumstantial evidence, the view that MY poses a grave risk to undisturbed vegetation still persists and needs to be corrected accordingly.

show abstract

Systemic iron implants alleviate symptoms of Mundulla Yellows in roadside eucalypts in south east South Australia

Schultz

Good

2018

Australasian Plant Pathol.

View full text Add to dashboard Cite

Mundulla Yellows disease of eucalypts: descriptors and preliminary studies on distribution and etiology

Cited by 10 publications

References 9 publications

Phytoplasmas–The “Crouching Tiger” Threat of Australian Plant Pathology

Phytoplasmas–The “Crouching Tiger” Threat of Australian Plant Pathology

Is Mundulla Yellows really a threat to undisturbed native vegetation? A comment

Systemic iron implants alleviate symptoms of Mundulla Yellows in roadside eucalypts in south east South Australia

Contact Info

Product

Resources

About