The mycobiota of the weed Chromolaena odorata in southern Brazil with particular reference to fungal pathogens for biological control

Barreto, Robert W.; Evans, H. C.

doi:10.1016/s0953-7562(09)80196-2

Cited by 34 publications

(18 citation statements)

References 11 publications

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“…This diversity is not unexpected for common pantropical weeds. A similarly high diversity has also been recorded from other neotropical plant species that have spread globally such as Chromolaena odorata (L.) King & Robinson (Barreto & Evans, 1994), Lantana camara L. (Barreto et al 1995) and Mikania micrantha Kunth. (Barreto & Evans 1995a, b).…”

Section: Discussionsupporting

confidence: 53%

Pathogenic mycobiota of the weeds Bidens pilosa and Bidens subalternans

Guatimosim

Pinto

Pereira

et al. 2015

Trop. plant pathol.

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Bidens pilosa and B. subalternans are highly noxious herbaceous neotropical asteraceous weeds. A survey of fungal pathogens associated with these two species was undertaken in Brazil, aimed at finding natural enemies in order to establish the potential for introducing novel specific pathogens from other regions of the world, as classical biological control agents. Ten fungal species were found associated with both B. pilosa and B. subalternans, namely: Cercospora bidentis, C. maculicola, Entyloma bidentis, E. compositarum, E. guaraniticum, Neoerysiphe cumminsiana, Plasmopara halstedii, Podosphaera xanthii, Uromyces bidentis, and U. bidenticola. Three other species were found solely associated only with B. subalternans: Colletotrichum bidentis, Pseudocercosporella bidentis and Sphaceloma bidentis. Pseudocercosporella bidentis is described herein as new to science.

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Section: Discussionsupporting

confidence: 53%

Pathogenic mycobiota of the weeds Bidens pilosa and Bidens subalternans

Guatimosim

Pinto

Pereira

et al. 2015

Trop. plant pathol.

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“…Comprehensive identification of the weed's mycobiota has been made in some programs (Barreto & Evans 1994, while other surveys have been less intensive and aimed only at identifying most common and widespread diseases (Anderson et al 2002;Widmer & Sforza 2004). Sometimes, surveys focus only on a specific pathogen that has already been identified from the literature as a highly promising agent.…”

Section: Field Surveys and Climatic Matchingmentioning

confidence: 99%

“…The targeted approach involves making regular visits within a single year to specific sites selected in a region with diverse topography, vegetation and climate (Barreto & Evans 1994. A more ad hoc approach involves visiting all sites infested with the target weed that are encountered while travelling across a wide geographical area each season or year, for a number of years (Anderson et al 2002;Widmer & Sforza 2004).…”

Section: Field Surveys and Climatic Matchingmentioning

confidence: 99%

“…In general, fungal species found during surveys are promptly discarded from the candidate list if they: (i) are already present in the intended release area (although exotic, more aggressive strains are sometimes investigated further); (ii) are known to cause only very minor damage; (iii) require previously damaged tissue to colonise the plant; (iv) necessitate an exotic vector for transmission; and/ or (v) have a known wide host range Berner & Bruckart 2005). For the remaining pathogens, the decision about which species merit further investigation is generally based on observations, made ad hoc during surveys, of disease impact on the target weed in different climatic regions and occurrence on other hosts (Barreto & Evans 1994Evans 1997Evans , 2000. In a few instances, results from preliminary glasshouse assessment of their pathogenicity on the weed host can also assist the decision process (Berner & Bruckart 2005).…”

Section: Prioritisation Of Candidate Pathogensmentioning

confidence: 99%

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Selection of pathogen agents in weed biological control: critical issues and peculiarities in relation to arthropod agents

Morin

Evans

Sheppard

2006

Australian Journal of Entomology

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Plant pathogens are playing an increasing role in classical biological control of weeds worldwide. This paper presents an explicit framework consisting of various interconnected steps to facilitate and streamline the selection process for pathogen agents. It also highlights and discusses critical issues associated with the various steps of the selection framework such as the climatic-matching approach to find well-adapted agents, host-pathogen matching and pathogen genetic structure. Processes and issues relating to the selection of pathogens are then contrasted with those usually adopted for arthropod selection in weed biological control. In both cases optimising the level of genetic diversity in introduced agents is seen as beneficial to biological control success. The difference in regulatory approach for multiple and genetically pure pathogen strains vs. genetically variable arthropod agents is highlighted for further scientific debate.

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“…Pathogenic fungi have been studied since the 1980s as a potential source of biological agents to be used against weeds native from Brazil (1,2,3,12,14) Solanum glaucophyllum Desf. (=S.…”

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confidence: 99%