Document Type : Complete paper
Authors
1
M.Sc. of Plant Protection Department, Ferdowsi University of Mashhad, Mashhad, Iran
2
Biocontrol and Insect Pathology Laboratory, Department of Plant Protection, Faculty of Agricultura, Ferdowsi University of Mashhad, Mashhad, Iran
3
Professor of Plant Protection Department, Ferdowsi University of Mashhad, Mashhad, Iran
Abstract
In order to assay the pathogenicity of the entomopathogenic nematode, Heterorhabditis bacteriophora Poinar, 1975 on the indigenous population of common earwig, Forficula auricularia L., several concentrations including 100, 250, 500, 1000, 1500, 2000 and 3000 (IJs/ml of DW) were used in the laboratory conditions. In this experiment, effects of time (F 1, 91= 4.22, P <0.05) and concentration (F 6, 91= 14.9, P <0.01) of nematodes were significant on mortality F. auricularia, while, interaction of time and concentration was no significant on mortality of earwig (F 6, 91= 1.16, P=0.33). Beside, block factor had significant effect on mortality of earwig (F 7, 91= 0.94, P = 0.49). The maximum mortality was reached by 3000 IJs/ml after 48 hours of treatment. In order to measure the nematode reproductive potential within the earwig body, the concentration of 500 IJs/ml was used. The average rate of pathogen reproductively was 599.5 IJs/mg earwing body weight. The results of this study showed that common earwig could be as a host for H. bacteriophora. The aim of this study was to identify the possible pathogenicity of the entomopathogenic nematode, H. bacteriophora on common earwig, as confirmed by the results of this study.
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