Establishment, distribution and abundance of Mimosa pigra biological control agents in northern Australia: implications for biological control

Ostermeyer, N.; Grace, Blair

doi:10.1007/s10526-006-9054-0

Cited by 23 publications

(31 citation statements)

References 24 publications

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“…The Bacchus marsh wattle, Acacia rostriformis (formerly A. verniciflua; Figure Ic) is known to have been introduced and cultivated, but no records exist of naturalisation or invasion (B2). Finally, the curry wattle, Acacia spondylophylla ( Figure Id) is not known to have been introduced to South Africa, or indeed to anywhere else (A) At least 45 species have been formally assessed for the biological control of the invasive legume Mimosa pigra in Australia, of which 32 have been tested in quarantine in Australia, and 14 released into the environment [53][54][55]. Temnocerus debilis ( Figure Ie) was imported and tested in quarantine.…”

Section: Box 1 Aliens Placed On the Unified Frameworkmentioning

confidence: 99%

A proposed unified framework for biological invasions

Blackburn

Pyšek

Bacher

et al. 2011

Trends in Ecology & Evolution

1,981

1,786

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There has been a dramatic growth in research on biological invasions over the past 20 years, but a mature understanding of the field has been hampered because invasion biologists concerned with different taxa and different environments have largely adopted different model frameworks for the invasion process, resulting in a confusing range of concepts, terms and definitions. In this review, we propose a unified framework for biological invasions that reconciles and integrates the key features of the most commonly used invasion frameworks into a single conceptual model that can be applied to all human-mediated invasions. The unified framework combines previous stage-based and barrier models, and provides a terminology and categorisation for populations at different points in the invasion process.

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Section: Box 1 Aliens Placed On the Unified Frameworkmentioning

confidence: 99%

A proposed unified framework for biological invasions

Blackburn

Pyšek

Bacher

et al. 2011

Trends in Ecology & Evolution

1,981

1,786

View full text Add to dashboard Cite

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“…A biocontrol program which commenced in 1979 released 15 insects and 2 fungi, resulted in partial success (Heard 2012). Although extensive research has been carried out on the monitoring and evaluation of classical biocontrol agents of M. pigra particularly insects and also a rust fungus (McIntyre & Menges 2004;Paynter 2005Paynter , 2006Ostermeyer & Grace 2007), very little is known about the potential of classical biocontrol and the other possible contributing factors at play in relation to the occurrence of the dieback phenomenon. Furthermore, most of the evaluation studies have been short term and were conducted in controlled conditions (Steinbauer 1998;Paynter & Hennecke 2001).…”

Section: Research Backgroundmentioning

confidence: 99%

“…Manipulative experiments have been conducted in shade houses or in the field (Steinbauer 1998;Paynter & Hennecke 2001;Paynter 2006). A modelling study was conducted by (Buckley et al 2004), while other studies have focused on the postrelease abundance of the established agents (Steinbauer et al 2000;Ostermeyer & Grace 2007).…”

Section: Evaluation Of Mimosa Pigra Biocontrol Programsmentioning

confidence: 99%

“…In addition, other four agents, the looper moth Macaria pallidata, the tip and green seed feeder Chalcodermis serripes, the tip and flower weevil Coelocephalapion pigrae, and the root feeder Malacorhinus irregularis may be capable of causing dieback, but because their populations are mobile and their damage is less persistent, it is more difficult to survey and record their populations and effects (Ostermeyer & Grace 2007;Heard et al 2010).…”

Section: There May Be Possible Cryptic Damage That Has Not Been Recormentioning

confidence: 99%

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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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“…This lepidopteran species in the family of Sesiidae has been introduced to Australia as a potential biological control agent. 3,4) C. mimosa has not been officially introduced in Vietnam, but it is frequently found in Can Tho City. We are planning to utilize this species for biological control of the weed in the Mekong Delta as well.…”

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confidence: 99%