Ecology of the entomopathogenic fungi Beauveria bassiana and Metarhizium anisopliae in temperate agroecosystems: Potential for conservation biological control

Meyling, Nicolai V.; Eilenberg, Jørgen

doi:10.1016/j.biocontrol.2007.07.007

Cited by 474 publications

(350 citation statements)

References 82 publications

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“…1). Significant variation in occurrence of pathogens across sites is consistent with previous work, which found spatial heterogeneity among natural populations of soil entomopathogens (Chandler et al,1997;Meyling and Eilenberg, 2007). Both pathogens were present in all fields in 2008 and four of five fields in 2009.…”

Section: Surveysupporting

confidence: 90%

Entomopathogenic fungi in cornfields and their potential to manage larval western corn rootworm Diabrotica virgifera virgifera

Rudeen

Jaronski

Petzold-Maxwell

et al. 2013

Journal of Invertebrate Pathology

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Entomopathogenic ascomycete fungi are ubiquitous in soil and on phylloplanes, and are important natural enemies of many soil-borne arthropods including larval western corn rootworm, Diabrotica virgifera virgifera, which is a major pest of corn. We measured the prevalence of Beauveria bassiana andMetarhizium anisopliae sensu lato in ten cornfields in Iowa, USA by baiting with larval insects. B. bassianaand M. anisopliae s.l. were present in 60% ± 6.3% and 55% ± 6.4% of soil samples, respectively. Subsequent laboratory bioassays found that some M. anisopliae s.l. strains collected from cornfields killed a greater proportion of D.v. virgifera larvae than a standard commercial strain. Entomopathogenic ascomycete fungi are ubiquitous in soil and on phylloplanes, and are important natural enemies of many soil-borne arthropods including larval western corn rootworm, Diabrotica virgifera virgifera, which is a major pest of corn. We measured the prevalence of Beauveria bassiana and Metarhizium anisopliae sensu lato in ten cornfields in Iowa, USA by baiting with larval insects. B. bassiana and M. anisopliae s.l. were present in 60% ± 6.3% and 55% ± 6.4% of soil samples, respectively. Subsequent laboratory bioassays found that some M. anisopliae s.l. strains collected from cornfields killed a greater proportion of D.v. virgifera larvae than a standard commercial strain.Published by Elsevier Inc.

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Section: Surveysupporting

confidence: 90%

Entomopathogenic fungi in cornfields and their potential to manage larval western corn rootworm Diabrotica virgifera virgifera

Rudeen

Jaronski

Petzold-Maxwell

et al. 2013

Journal of Invertebrate Pathology

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“…This was mostly because of the extreme abundance of the OTU affiliated with M. anisopliae at stage 35, which may indicate a high abundance of either the hyphal or spore forms. M. anisopliae is a well-known entomopathogenic fungus (ecologically assigned as 'animal parasite'), but a saprotrophic and/or plantassociated lifestyle is also possible (Meyling and Eilenberg, 2007). We advocate further studies to properly confirm the identity (for example, by isolation and culture) and ecological function of this organism, as well as the factors mediating its high abundance at the intermediate soil stage.…”

Section: Discussionmentioning

confidence: 99%

Ecological succession reveals potential signatures of marine–terrestrial transition in salt marsh fungal communities

et al. 2016

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Marine-to-terrestrial transition represents one of the most fundamental shifts in microbial life. Understanding the distribution and drivers of soil microbial communities across coastal ecosystems is critical given the roles of microbes in soil biogeochemistry and their multifaceted influence on landscape succession. Here, we studied the fungal community dynamics in a well-established salt marsh chronosequence that spans over a century of ecosystem development. We focussed on providing high-resolution assessments of community composition, diversity and ecophysiological shifts that yielded patterns of ecological succession through soil formation. Notably, despite containing 10-to 100-fold lower fungal internal transcribed spacer abundances, early-successional sites revealed fungal richnesses comparable to those of more mature soils. These newly formed sites also exhibited significant temporal variations in β-diversity that may be attributed to the highly dynamic nature of the system imposed by the tidal regime. The fungal community compositions and ecophysiological assignments changed substantially along the successional gradient, revealing a clear signature of ecological replacement and gradually transforming the environment from a marine into a terrestrial system. Moreover, distance-based linear modelling revealed soil physical structure and organic matter to be the best predictors of the shifts in fungal β-diversity along the chronosequence. Taken together, our study lays the basis for a better understanding of the spatiotemporally determined fungal community dynamics in salt marshes and highlights their ecophysiological traits and adaptation in an evolving ecosystem.

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“…Knowledge of the ecology of indigenous populations of entomopathogens in agroecosystems, as well as the effects of environmental conditions and agricultural practices, is therefore necessary if they are to be manipulated for conservative biological control EILENBERG, 2007). TSCHARNTKE et al (2005) showed that the structure of the agricultural landscape has impact on agroecosystem biodiversity and thus the ecosystem services they deliver.…”

Section: Fieldmentioning

confidence: 99%

Two methods for isolation of endophytic and edaphic Bacillus spp. from sugarcane fields

et al. 2018

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ABSTRACT:Bacillus has been widely studied and used for the control of pests and diseases. The adapted protocol proposed by POLANCZYK (2004) proved to be more efficient than the one by the World Health Organization (WHO, 1985) to isolate edaphic strains of Bacillus. However, it has not been assessed for isolation of endophytic strains, which are much less abundant in the nature and more difficult to be isolated. This study aimed to compare two methodological procedures for isolation of Bacillus, established by the WHO (1985) and by POLANCZYK (2004), regarding their efficiency for isolation of endophytics and edaphics Bacillus strains from inside the root tissue of sugarcane, as well as from the associated soil sample, collected from 11 locations; and to compare the density of bacteria in both environments. Endophytic and edaphic strains of Bacillus were isolated by both procedures. However, the isolation protocol performed by POLANCZYK (2004) made more efficient by having a greater number of colony forming units (CFU) per gram of soil and root indicating that this procedure is more useful, especially for isolation of endophytic strains of Bacillus, which are much less abundant in the nature than edaphic strains, being therefore more difficult to be isolated. Using the Polanczyk protocol (2004), Bacillus strains were recovered from all roots (endophytic) and soil (edaphic) samples of all the 11 fields, suggesting that the plant root may be another important source for isolation of Bacillus besides the soil. Higher densities of Bacillus were isolated from the edaphic environment compared with the endophytic environment, with significant differences when isolated by Polanczyk method (2004 (2004), quanto a sua eficiência para o isolamento de estirpes endofitas e edáficas de Bacillus originárias do interior do tecido radicular de cana-de-açúcar, bem como de amostras de solos associados, coletada de 11 locais; e comparar a densidade de bactérias em ambos os ambientes. As cepas endofíticas e edáficas de Bacillus foram isoladas por ambos os procedimentos. No entanto, o protocolo de isolamento realizado por POLANCZYK (2004) demonstrou-se mais eficiente por gerar maior número de unidades de formação de colônias (CFU) por grama de solo e raiz, indicando que esse procedimento é mais útil, especialmente para isolamento de estirpes endofíticas de Bacillus, que são muito menos abundantes na natureza do que as cepas edáficas, sendo, portanto, mais difíceis de serem isoladas. Usando o protocolo de POLANCZYK (2004), as cepas de Bacillus foram isoladas de todas as amostras de raízes (endofíticas) e de solo (edáficas) de todos os 11 campos, sugerindo que a raiz da planta pode ser outra fonte importante de isolamento de Bacillus além do solo. As densidades mais altas de Bacillus foram isoladas do ambiente edáfico em comparação com o ambiente endofítico, com diferenças significativas quando isoladas pelo método de POLANCZYK (2004). PALAVRAS-CHAVE: controle biológico; bactéria benéfica;solo; raiz; endósporos.

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Ecology of the entomopathogenic fungi Beauveria bassiana and Metarhizium anisopliae in temperate agroecosystems: Potential for conservation biological control

Cited by 474 publications

References 82 publications

Entomopathogenic fungi in cornfields and their potential to manage larval western corn rootworm Diabrotica virgifera virgifera

Entomopathogenic fungi in cornfields and their potential to manage larval western corn rootworm Diabrotica virgifera virgifera

Ecological succession reveals potential signatures of marine–terrestrial transition in salt marsh fungal communities

Two methods for isolation of endophytic and edaphic Bacillus spp. from sugarcane fields

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