Toxicity of Pyrethroid and Organophosphorous Insecticides against Two Field Collected Strains of the German Cockroach Blattella germanica (Blattaria: Blattellidae) from Hospitals in Hamadan, Iran
Background: The German cockroach, Blattella germanica is a major hygienic pest and mechanical vector for path- ogenic agents in hospitals and residential areas. The development of insecticide resistance is a serious problem in controlling of this pest. Toxicity of four commonly used insecticides (pe...
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| Format: | Article |
| Language: | English |
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Tehran University of Medical Sciences
2015-10-01
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| Series: | Journal of Arthropod-Borne Diseases |
| Subjects: | |
| Online Access: | https://jad.tums.ac.ir/index.php/jad/article/view/164 |
| _version_ | 1830282329987219456 |
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| author | Mojtaba Limoee Behroz Davari Seyed Hassan Moosa-Kazemi |
| author_facet | Mojtaba Limoee Behroz Davari Seyed Hassan Moosa-Kazemi |
| author_sort | Mojtaba Limoee |
| collection | DOAJ |
| description | Background: The German cockroach, Blattella germanica is a major hygienic pest and mechanical vector for path- ogenic agents in hospitals and residential areas. The development of insecticide resistance is a serious problem in controlling of this pest. Toxicity of four commonly used insecticides (permethrin, cypermethrin, malathion and chlorpyrifos) against two hospital- collected strains of the German cockroach was investigated.
Methods: Topical bioassay methods were carried out for detecting insecticide susceptibility of adult male cock- roaches. For each insecticide, four to six concentrations resulting in >0% and <100% mortality were used. Three to six replicates of 10 cockroaches per concentration were conducted. The differences between LD50 (µ g/g) values were considered statistically significant only when the 95% confidence intervals did not overlap
Results: Two hospital- collected strains of the German cockroach showed low to moderate levels of resistance to chlorpyrifos, permethrin, malathion and cypermethrin based on resistance ratios compared with susceptible strain.
Conclusion: The low level chlorpyrifos resistance suggesting this insecticide may still provide adequate control of these strains. While the obsereved moderate levels of resistance to cypermethrin could imply developing resistance to this compound. |
| first_indexed | 2024-12-19T02:36:11Z |
| format | Article |
| id | doaj.art-66bd264df1374b90a00516f0b722ae6c |
| institution | Directory Open Access Journal |
| issn | 1735-7179 2322-2271 |
| language | English |
| last_indexed | 2024-12-19T02:36:11Z |
| publishDate | 2015-10-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | Journal of Arthropod-Borne Diseases |
| spelling | doaj.art-66bd264df1374b90a00516f0b722ae6c2022-12-21T20:39:23ZengTehran University of Medical SciencesJournal of Arthropod-Borne Diseases1735-71792322-22712015-10-0162Toxicity of Pyrethroid and Organophosphorous Insecticides against Two Field Collected Strains of the German Cockroach Blattella germanica (Blattaria: Blattellidae) from Hospitals in Hamadan, IranMojtaba Limoee0Behroz Davari1Seyed Hassan Moosa-Kazemi2Depatment of Public Health, Nosocomial Infections Research Center, Kermanshah University of Medical Sciences, Kermanshah, IranDepartment of Entomology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran AND Kurdistan University of Medical Sciences and Environment Health research Center, Kurdistan, IranDepartment of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, IranBackground: The German cockroach, Blattella germanica is a major hygienic pest and mechanical vector for path- ogenic agents in hospitals and residential areas. The development of insecticide resistance is a serious problem in controlling of this pest. Toxicity of four commonly used insecticides (permethrin, cypermethrin, malathion and chlorpyrifos) against two hospital- collected strains of the German cockroach was investigated. Methods: Topical bioassay methods were carried out for detecting insecticide susceptibility of adult male cock- roaches. For each insecticide, four to six concentrations resulting in >0% and <100% mortality were used. Three to six replicates of 10 cockroaches per concentration were conducted. The differences between LD50 (µ g/g) values were considered statistically significant only when the 95% confidence intervals did not overlap Results: Two hospital- collected strains of the German cockroach showed low to moderate levels of resistance to chlorpyrifos, permethrin, malathion and cypermethrin based on resistance ratios compared with susceptible strain. Conclusion: The low level chlorpyrifos resistance suggesting this insecticide may still provide adequate control of these strains. While the obsereved moderate levels of resistance to cypermethrin could imply developing resistance to this compound.https://jad.tums.ac.ir/index.php/jad/article/view/164Insecticide resistancePyrethroidOrganophosphateGerman cockroach |
| spellingShingle | Mojtaba Limoee Behroz Davari Seyed Hassan Moosa-Kazemi Toxicity of Pyrethroid and Organophosphorous Insecticides against Two Field Collected Strains of the German Cockroach Blattella germanica (Blattaria: Blattellidae) from Hospitals in Hamadan, Iran Journal of Arthropod-Borne Diseases Insecticide resistance Pyrethroid Organophosphate German cockroach |
| title | Toxicity of Pyrethroid and Organophosphorous Insecticides against Two Field Collected Strains of the German Cockroach Blattella germanica (Blattaria: Blattellidae) from Hospitals in Hamadan, Iran |
| title_full | Toxicity of Pyrethroid and Organophosphorous Insecticides against Two Field Collected Strains of the German Cockroach Blattella germanica (Blattaria: Blattellidae) from Hospitals in Hamadan, Iran |
| title_fullStr | Toxicity of Pyrethroid and Organophosphorous Insecticides against Two Field Collected Strains of the German Cockroach Blattella germanica (Blattaria: Blattellidae) from Hospitals in Hamadan, Iran |
| title_full_unstemmed | Toxicity of Pyrethroid and Organophosphorous Insecticides against Two Field Collected Strains of the German Cockroach Blattella germanica (Blattaria: Blattellidae) from Hospitals in Hamadan, Iran |
| title_short | Toxicity of Pyrethroid and Organophosphorous Insecticides against Two Field Collected Strains of the German Cockroach Blattella germanica (Blattaria: Blattellidae) from Hospitals in Hamadan, Iran |
| title_sort | toxicity of pyrethroid and organophosphorous insecticides against two field collected strains of the german cockroach blattella germanica blattaria blattellidae from hospitals in hamadan iran |
| topic | Insecticide resistance Pyrethroid Organophosphate German cockroach |
| url | https://jad.tums.ac.ir/index.php/jad/article/view/164 |
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