Laboratory performance of 0.05% fipronil and 2.15% imidaclporid gel baits against German cockroach blattella germanica

AUTHORS

Hassan Nasirian 1 , * , Hossein Ladonni 2 , Hassan Vatandoost 3 , Mansoureh Shayeghi 3 , Abbas Poudat 4

AUTHORS INFORMATION

1 Laboratory Technician, Department of Medical Entomology & Vector Control, Tehran University of Medical Sciences, Tehran, Iran.

2 Full Professor, Department of Medical Entomology & Vector Control, Tehran University of Medical Sciences, Tehran, Iran.

3 Associate Professor, Department of Medical Entomology & Vector Control, Tehran University of Medical Sciences, Tehran, Iran.

4 Instructor, Department of Medical Entomology & Vector Control, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.

ARTICLE INFORMATION

Hormozgan Medical Journal: 10 (2); e89808
Published Online: July 05, 2006
Article Type: Research Article
Received: July 18, 2005
Accepted: July 05, 2006

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Abstract

Introduction: Application of insecticidal baits is one of the most common and
effective strategies for controlling German cockroach, (Blattella germanica L.)
The current study was designed to investigate the susceptibility level of German
cockroach to fipronil and imidacloprid gel baits in laboratory situation and to
recommend its usage in Iran.
Methods: This experimental study was conducted on eight German cockroach
strains. Tests were conducted on newly emerged adult males (Ultimately 3 weeks
old). Adult male German cockroachs starved for 12 hours, and then ingested
fipronil and imidacloprid gel baits for 2 hours. After given time was over, we
removed the bait and replaced it with mice foods. Mortality was recorded at 12
intervals for 6 days. Data were pooled and assessed by probit regression analysis.
Results: Feeding assays revealed that in all strains mortality rate after 2 hours
ingestion of fipronil and imidacloprid gel baits for 144 hours (6 days) was 100%.
In all strains more than 60% mortality in imidacloprid ingested gel bait after 24
hours and 100% mortality (except Shahmorady and Zanjan dormitory strains)
after 48 hours was observed. Whereas, in some strains 10-30% mortality in
fipronil ingested gel bait was seen and in some strains no mortality after 24 hours
while most of them had a rate of 60% mortality after 48 hours. These
observations indicate that the imidacloprid gel bait operates faster than the
fipronil gel bait as is expected. The susceptible strain showed LT50 of 47.13 and
11.31 h for fipronil and imidacloprid gel baits, respectively. The result of this
investigation indicated that all feral strains are susceptible to fipronil and
imidacloprid gel baits.
Conclusion: Considerins the ever-increasing infestation of human habitations
with German cockroach, and its resistance to conventional insecticides(esp.
pyrethroides), its intensity in the future. is increasingly growing Toxic fipronil
bait can be an appropriate substitute for controlling this hygiene pest in Iran.

Keywords

German Cockroach –Insecticidal Bait – Fipronil – Imidacloprid – Laboratory Performance – Belattella Germanica

© 2006, Hormozgan Medical Journal. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.
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