Biodegradation of entomopathogenic hyphomycetes: Influence of clay coating on Beauveria bassiana blastospore survival in soil

Fargues, Jacques; Reisinger, O.; Robert, Pierre; Aubart, C.

doi:10.1016/0022-2011(83)90212-4

Cited by 35 publications

(13 citation statements)

References 18 publications

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“…For example, Fargues, Reisinger, Robert, and Aubart (1983) found that blastospores of B. bassiana incubated in soils were inactivated within 3 weeks. Ultrastructural studies revealed that the blastospores had perforations made by amoebae and bacteria.…”

Section: Protozoamentioning

confidence: 99%

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Natural and released inoculum levels of entomopathogenic fungal biocontrol agents in soil in relation to risk assessment and in accordance with EU regulations

Scheepmaker

Butt

2010

Biocontrol Science and Technology

123

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Entomopathogenic fungi being developed as biological control agents (BCAs) may have the potential to spread and become established in the environment. For registration purposes, the risks concerning their persistence have to be evaluated according to EU legislation which requires the decline of BCAs to acceptable background levels unless related risks are acceptable. In order to deal with this requirement, applicants of a BCA need to give information on its persistence and natural background levels. For risk assessors and registration authorities guidance on how to evaluate data on natural background levels of indigenously occurring species (0same species as the introduced BCA) is needed. For this purpose, an overview is presented on background levels of some indigenous fungi as well as persistence data of some applied fungal BCAs. Data were restricted to commerical species. It was found that for the species Metarhizium anisopliae, Beauveria bassiana and Beauveria brongniartii natural densities were relatively low and introduced strains of these fungi decreased gradually in time. Many factors were found in the literature, such as intrinsic, edaphic, biotic, climatic, and cultural factors, that could explain this decline.

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Section: Protozoamentioning

confidence: 99%

“…There was also evidence of physical damage resulting from feeding by mites or collembolans. Formulating the blastospores in a coating of clay substantially retarded the process of biodegradation (Fargues et al 1983). …”

Section: Protozoamentioning

confidence: 99%

Natural and released inoculum levels of entomopathogenic fungal biocontrol agents in soil in relation to risk assessment and in accordance with EU regulations

Scheepmaker

Butt

2010

Biocontrol Science and Technology

123

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“…Clay positively affected the occurrence of a related species, B. brongniartii (Saccardo) Petch, in soil in Switzerland (Kessler et al 2003). Conidia of B. bassiana were coated with clay particles to increase persistence, but these clay-coated propagules either were not tested against insects (Fargues et al 1983 or did not improve efÞcacy in nonclay soils ). In the current research, the experimental design required transmission for ants to become infected; conidial persistence was not a limiting factor because of the relatively short duration of the experiment and continued production of conidia in infected ants.…”

Section: Discussionmentioning

confidence: 98%

Effects of Soil Moisture and Composition and Fungal Isolate on Prevalence ofBeauveria bassianain Laboratory Colonies of the Red Imported Fire Ant (Hymenoptera: Formicidae)

Fuxa

Richter

2004

Environ Entomol

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“…However, persistence of B. bassiana near the soil surface (0-to 5-cm depth) may be higher in soils with small pore sizes (Vänninen et al 2000) and a clay coating on B. bassiana blastospores reduces biodegradation (Fargues et al 1983). In 2006, our B. bassiana results corroborate these observations with signiÞcant plum curculio mortality in clay loam and loamy sand, but no signiÞcant mortality in the two sandy sites.…”

Section: August 2009mentioning

confidence: 98%

Field Efficacy of Entomopathogenic Fungi and Nematodes Targeting Caged Last-Instar Plum Curculio (Coleoptera: Curculionidae) in Michigan Cherry and Apple Orchards

2009

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The plum curculio (Conotrachelus nenuphar Herbst) is a key pest of pome and stone fruit in eastern North America. We tested the efficacy of five pathogens over the course of three seasons in 10 Michigan apple and cherry orchards, with introductions of larvae to caged pots containing pathogen-treated soil. The nematode Steinernema riobrave was the most effective pathogen in the 2 yr it was tested, but only in soils with the highest sand content (81-88%) and when it was applied 1 h or 5 d after last instars of plum curculio. S. carpocapsae in an organic formulation was less effective, but significantly reduced plum curculio emergence in 1 yr of the study when applied 3 d before C. nenuphar larvae were introduced. Beauveria bassiana was effective in only 1 of the 3 yr it was tested, only in soils with lower sand content, and only when it was introduced within 1 h of plum curculio larvae. Metarhizium anisopliae and Heterorhabditis bacteriophora were ineffective. Michigan orchards may require sprinkler irrigation coupled with precise timing recommendations and oviposition monitoring to enhance entomopathogen application efficacy against soil-dwelling last instars.

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Biodegradation of entomopathogenic hyphomycetes: Influence of clay coating on Beauveria bassiana blastospore survival in soil

Cited by 35 publications

References 18 publications

Natural and released inoculum levels of entomopathogenic fungal biocontrol agents in soil in relation to risk assessment and in accordance with EU regulations

Natural and released inoculum levels of entomopathogenic fungal biocontrol agents in soil in relation to risk assessment and in accordance with EU regulations

Effects of Soil Moisture and Composition and Fungal Isolate on Prevalence ofBeauveria bassianain Laboratory Colonies of the Red Imported Fire Ant (Hymenoptera: Formicidae)

Field Efficacy of Entomopathogenic Fungi and Nematodes Targeting Caged Last-Instar Plum Curculio (Coleoptera: Curculionidae) in Michigan Cherry and Apple Orchards

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