Laboratory Evaluation of Toxicity of Insecticide Formulations from Different Classes Against American Cockroach (Dictyoptera: Blattidae)

Overview

Journal J Arthropod Borne Dis

Publisher Tehran University of Medical Sciences

Date 2015 Jan 29

PMID 25629062

Citations 6

Authors

Ruhma Syed

Farkhanda Manzoor

Rooma Adalat

Abida Abdul-Sattar

Azka Syed

Affiliations

Soon will be listed here.

Abstract

Background: The present study was designed to investigate the insecticidal efficacy of four different classes of insecticides: pyrethroids, organophosphates, phenyl-pyrazoles and neo-nicotenoids. One representative chemical from each class was selected to compare the toxicity: deltamethrin from pyrethroids, Dichlorovinyl Dimethyl Phosphate (DDVP) from organophosphates, fipronil from phenyl-pyrazoles and imidacloprid from neo-nicotenoids. The objective of this study was to determine which of these insecticides were most effective against American cockroach.

Methods: These insecticides were tested for their LC50 values against Periplaneta americana under topical bioassay method, using different concentrations for each chemical.

Results: Fipronil 2.5% EC was highly effective at all concentrations applied, while DDVP 50% EC was least toxic amongst all. One way analysis of variance confirmed significant differences between mortality of P. americana and different concentrations applied (P< 0.05).

Conclusion: Locality differentiation is an important factor in determining the range of resistance between various localities, as all three localities behaved differently in terms of their levels of resistance.

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