Tip Dieback of Mango (<i>Mangifera indica</i>) Caused by<i>Botryosphaeria ribis</i>

Ramos, Lucas Feksa; Lara, Sergio; McMillan, R. T.; Narayanan, K. R.

doi:10.1094/pd-75-0315

Cited by 30 publications

(19 citation statements)

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“…Mango dieback in the north (N) and NW of Australia has been associated with N. dimidiatum and N. novaehollandiae (Ray et al 2010). Tip dieback has been reported in mango trees situated in Florida, associated with infection by B. dothidea (Ploetz et al 1996) and N. ribis (Ramos et al 1991;Ramos et al 1997;Prakash and Eckert 2001). Lasiodiplodia theobromae also causes cankers, dieback and sap staining in other woody trees (Mohali 1993;Mohali et al 2002;Slippers and Wingfield 2007;Punithalingam 1980).…”

Section: Au)mentioning

confidence: 99%

Pathogenic Botryosphaeriaceae associated with Mangifera indica in the Kimberley Region of Western Australia

Ray²,

et al. 2011

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Members of the Botryosphaeriaceae, in particular Lasiodiplodia theobromae, Neofusicoccum parvum, Neofusicoccum mangiferae and Botryosphaeria dothidea, commonly cause stem cankers, dieback and stem end rot of mangoes worldwide. In the current study, eight taxa of Botryosphaeriaceae were identified as canker-associated fungi, pathogens, potential pathogens or endophytes of mangoes in the Kimberley, Australia. These include Neoscytalidium novaehollandiae, Neoscytalidium dimidiatum, Pseudofusicoccum adansoniae, P. ardesiacum, P.kimberleyense, Lasiodiplodia sp. 1, Lasiodiplodia iraniensis and Lasiodiplodia pseudotheobromae. The pathogenicity of a selection of these species toward fruit and branches was tested. All were pathogenic to mango in comparison to the control, with Lasiodiplodia spp.being the most pathogenic. It appears that either geographic isolation or the unique growing conditions in the Kimberley may have provided an effective barrier to the acquisition or establishment of known botryosphaeriaceous pathogens. Wounds caused by mechanical pruning may provide an entry point for infection, whilst severe pruning may increase plant stress.

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Section: Au)mentioning

confidence: 99%

Pathogenic Botryosphaeriaceae associated with Mangifera indica in the Kimberley Region of Western Australia

Ray²,

et al. 2011

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“…Botryosphaeria parva often has been misidentified as B. ribis and B. dothidea due to overlapping host ranges, morphological similarities and taxonomic confusion over the use of the names (Slippers et al 2004). Thus it also is likely that the fungus described as B. ribis from mango in Florida (Ramos et al 1991) is B. parva. These identifications from Florida were based on conidial dimensions, which overlap between B. ribis and B. parva (Slippers et al 2004).…”

Section: Fusicoccum Spmentioning

confidence: 99%

“…Apart from fruit diseases, Botryosphaeria spp. also cause tip-and branch dieback and cankers on mango trees (Stevens 1926, Ramos et al 1991. These fungi live endophytically in healthy tissue of all parts of mango plants and mostly cause disease after stress to the trees or fruit after harvest ( Johnson et al 1991a( Johnson et al , 1992Sangchote 1991).…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic and morphological re-evaluation of theBotryosphaeriaspecies causing diseases ofMangifera indica

et al. 2005

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Species of Botryosphaeria are among the most serious pathogens that affect mango trees and fruit. Several species occur on mangoes, and these are identified mainly on the morphology of the anamorphs. Common taxa include Dothiorella dominicana, D. mangiferae (ϭ Natrassia mangiferae), D. aromatica and an unidentified species, Dothiorella 'long'. The genus name Dothiorella, however, is acknowledged as a synonym of Diplodia. This study aimed to characterize and name the Botryosphaeria spp. associated with disease symptoms on mangoes. To achieve this isolates representing all four Dothiorella spp. mentioned above were compared with the anamorphs of known Botryosphaeria spp., based on conidial morphology and DNA sequence data. Two genomic regions were analyzed, namely the ITS rDNA and ␤-tubulin regions. The morphological and molecular results confirmed that the fungi previously identified from mango as species of Dothiorella belong to Fusicoccum. Dothiorella dominicana isolates were identical to isolates of F. parvum (teleomorph ϭ B. parva (teleomorph ϭ B. dothidea). A fourth Fusicoccum sp. also was identified as those isolates previously known as Dothiorella 'long'. A key is provided to distinguish these species based on anamorph morphology in culture. This study provides a basis for the identification of Botryosphaeria species from mango, which is important for disease control and to uphold quarantine regulations.

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“…In addition, Davison (2014) has pointed out that, to gain an accurate understanding of the complex dieback phenomenon, we should not forget the plant itself. An examination of plant resistance and its physiology in relation to stressors is important to help further understand dieback (Ramos et al 1991;Pascoe & Cottral 2000).…”

Section: Pathogenicity Chaptermentioning

confidence: 99%

Mimosa pigra dieback in the Northern Territory, Australia: Investigation into possible causes

Sacdalan¹

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In this study, Mimosa pigra dieback is described as plants or population of plants which appeared to suffer from ill health, death of their growing points and the emergence of green reshoots coming from the base. Dieback is an important phenomenon, not only in many crops and natural forests worldwide, but also in many invasive trees and shrubs in Australia. The dieback phenomenon is thought to be caused by complex and interacting factors and causes are often difficult to disentangle. In some cases it is a result of an interaction between both biotic and abiotic factors. Since 1988, dieback has been widely observed in Mimosa pigra L.(Fabaceae), a woody shrub that is one of the most serious exotic invaders of floodplains and riparian areas in the Top End of the Northern Territory. However, there has been no conclusive evidence of links between M. pigra dieback and specific causal factors. In addition, the dieback phenomenon has not been previously quantified.This thesis aimed to describe M. pigra dieback phenomenon at plant and population levels and its effect on plant growth, survival and demography. Specifically, the aim of this thesis was to evaluate the role of biotic factors (insect borers and fungal pathogens), and abiotic factors (soil pH and salinity), in relation to the development of M. pigra dieback. In addition, the thesis examines the pathogenicity of the fungal endophytes/pathogens associated with diebackaffected and healthy M. pigra. M. pigra has been a focus of biological control programs for more than 30 years, but it still remains a serious threat in the wetlands and conservation areas in the Top End of the Northern Territory. While extensive studies have been conducted to evaluate the impact of biological control programs, little is actually known about dieback and its causal factors.To evaluate the causal factors of M. pigra dieback, repeated ground surveys, plant health assessment and specimen collection of stems and soils, were conducted in the period 2011 to 2013 in established M. pigra sites on Melaleuca Station, Mary River, Northern Territory. Insect borers were quantified and putative fungal pathogen abundance were surveyed. A combined morphological and phylogenetic approach was used for fungal pathogens/endophyte identification. Using a subset of isolates, trials were performed to examine differences in the pathogenicity of the recovered fungal pathogens/endophytes.Results of field research showed that dieback in M. pigra is highly dynamic and fluctuates in its severity. Different sites showed increases and/or decreases in plant health over time.iii Dieback affects plants in all age classes, from seedlings, juveniles to adult plants, resulting in partial mortality of plants in all age categories over the trial period. Contrary to expectations, none of the biotic and abiotic factors examined showed a direct relationship to the changing population dynamics of M. pigra dieback over time. Nevertheless, fungal isolations demonstrated that M. pigra is a host to a diverse range of endop...

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Tip Dieback of Mango (Mangifera indica) Caused byBotryosphaeria ribis

Cited by 30 publications

References 0 publications

Pathogenic Botryosphaeriaceae associated with Mangifera indica in the Kimberley Region of Western Australia

Pathogenic Botryosphaeriaceae associated with Mangifera indica in the Kimberley Region of Western Australia

Phylogenetic and morphological re-evaluation of theBotryosphaeriaspecies causing diseases ofMangifera indica

Mimosa pigra dieback in the Northern Territory, Australia: Investigation into possible causes

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