Comparing the mortality of Protaetia brevitarsis seulensis (Coleoptera: Cetoniidae) caused by entomopathogenic bacteria and Serratia marcescens (Enterobacteriales: Enterobacteriaceae)

To investigate whether Serratia marcescens (Enterobacteriales: Enterobacteriaceae) isolated from Protaetia brevitarsis seulensis(Coleoptera: Cetoniidae) acts as an opportunistic bacterium in peroral infection, the primary entomopathogenic bacteria Bacillus thuringiensis (Bacillales: Bacillaceae) and...

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Bibliographic Details
Published in:International Journal of Industrial Entomology 2015-06, Vol.30 (2), p.40-44
Main Authors: Kwak, Kyu Won, Han, Myung Sae, Nam, Sung Hee, Choi, Ji Young, Lee, Seok Hyun, Kim, Hong Geun, Park, Kwan Ho
Format: Article
Language:Korean
Subjects:
Bacillus thuringiensis
Bioassay
Mortality
Paenibacillus popilliae
Protaetia brevitarsis seulensis
Serratia marcescens
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Summary:To investigate whether Serratia marcescens (Enterobacteriales: Enterobacteriaceae) isolated from Protaetia brevitarsis seulensis(Coleoptera: Cetoniidae) acts as an opportunistic bacterium in peroral infection, the primary entomopathogenic bacteria Bacillus thuringiensis (Bacillales: Bacillaceae) and Paenibacillus popilliae (Eubacteriales: Bacillaceae) were added to sawdust to perform a bioassay experiment. We found that peroral infection caused by S. marcescens could be fatal beyond a concentration of 4 × 108 pfu/mL in 2nd stage P. b. seulensis larvae and at 6 × 108 pfu/mL in 3rd stage P. b. seulensis larvae. In particular, mortality resulting from a combination of P. popilliae and S. marcescens was markedly increased in 2nd stage P. b. seulensis larvae. Therefore, we confirmed that mortality was increased when S. marcescens was infected together with other entomopathogenic bacteria, and that peroral infection itself can be fatal beyond certain concentrations.
ISSN:1598-3579