Biological control of the European cockchafer: persistence of Beauveria brongniartii after long-term applications in the Euroregion Tyrol

Melocont® Pilzgerste, a commercial product based on the entomopathogenic fungus Beauveria brongniartii (Sacc.) Petch (Ascomycota: Hypocreales) strain BIPESCO 2, was applied at different rates and time points over a period of 24 years in East-, North- and South Tyrol (Austria and Italy) to control th...

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Published inBioControl (Dordrecht, Netherlands) Vol. 60; no. 5; pp. 617 - 629
Main Authors Mayerhofer, Johanna, Enkerli, Jürg, Zelger, Roland, Strasser, Hermann
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.10.2015
Springer Nature B.V
Subjects
Agriculture
Animal Biochemistry
Animal Ecology
Ascomycota
Beauveria
Beauveria brongniartii
Behavioral Sciences
Biological control
biological control agents
Biomedical and Life Sciences
Entomology
Entomopathogenic fungi
Fungi
genotype
Genotypes
Grasslands
habitats
Insects
intergenic DNA
Investigations
Life Sciences
Melolontha melolontha
microsatellite repeats
Plant Pathology
population
Variance analysis
Italy
Austria
Netherlands
Switzerland
Germany
Cordycipitaceae
Hypocreales
Coleoptera
Inoculation biological control
Mycoinsecticide
Scarabaeidae
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Summary:Melocont® Pilzgerste, a commercial product based on the entomopathogenic fungus Beauveria brongniartii (Sacc.) Petch (Ascomycota: Hypocreales) strain BIPESCO 2, was applied at different rates and time points over a period of 24 years in East-, North- and South Tyrol (Austria and Italy) to control the European cockchafer (Melolontha melolontha L. and M. hippocastani F.). Beauveria spp. density was assessed and Beauveria spp. isolates were characterized at species and genotype level using Bloc intergenic region sequence and simple sequence repeat marker analyses. BIPESCO 2 was detected at 41 % of the treated sites, predominantly at sites where the fungus was applied at least once during the four years prior to sampling. At one site BIPESCO 2 was detected 15 years after the last treatment. Results showed that applications should be repeated to achieve good persistence of the biological control agent, and it indicated that despite intensive applications diverse populations of B. brongniartii or Beauveria spp. consortia can coexist in these habitats.
Bibliography:http://dx.doi.org/10.1007/s10526-015-9671-6
ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:1386-6141
1573-8248
DOI:10.1007/s10526-015-9671-6