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

Syed R, Manzoor F, Adalat R, Abdul-Sattar A, Syed A - J Arthropod Borne Dis (2013)

Bottom Line: 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).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.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology, Lahore College for Women University, Lahore, Pakistan.

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.

No MeSH data available.


Related in: MedlinePlus

Regression line of (a) Imidacloprid 5% SC (b) Fipronil 2.5% EC (c) Deltamethrin 2.5% SC and (d) DDVP 50% EC on mean mortality of SMH (locality 1) of P. americana (L)
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4289508&req=5

f1-jad-8-21: Regression line of (a) Imidacloprid 5% SC (b) Fipronil 2.5% EC (c) Deltamethrin 2.5% SC and (d) DDVP 50% EC on mean mortality of SMH (locality 1) of P. americana (L)

Mentions: Table 2 represents the comparative toxicities of four insecticides against three localities of P. amercana (L). When different concentrations (1.0, 2.0, 3.0, 4.0 and 5.0µl/ ml) of imidacloprid 5% SC were tested against P. americana, variable range was obtained according to its respective localities. LC50 for SMH was 2.712 µl/ ml, whereas comparatively low values were recorded for KTCH and KLPT (1.966 µl/ ml and 1.318 µl/ ml respectively). The regression analysis of variance further confirmed that there was an increasing trend in mean mortality of insects after 48 hours of treatment [for SMH: b= 3.1± 0.9, F(1,4)= 106.78, P= 0.001, for KTCH: b= 3± 2.63, F(1,4)= 3.42E+ 32, P= 3.48E- 49 and for KLPT: b= 2.7± 0.1, F(1,4)= 729, P= 0.001) (Fig. 1–3(a)].


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

Syed R, Manzoor F, Adalat R, Abdul-Sattar A, Syed A - J Arthropod Borne Dis (2013)

Regression line of (a) Imidacloprid 5% SC (b) Fipronil 2.5% EC (c) Deltamethrin 2.5% SC and (d) DDVP 50% EC on mean mortality of SMH (locality 1) of P. americana (L)
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4289508&req=5

f1-jad-8-21: Regression line of (a) Imidacloprid 5% SC (b) Fipronil 2.5% EC (c) Deltamethrin 2.5% SC and (d) DDVP 50% EC on mean mortality of SMH (locality 1) of P. americana (L)
Mentions: Table 2 represents the comparative toxicities of four insecticides against three localities of P. amercana (L). When different concentrations (1.0, 2.0, 3.0, 4.0 and 5.0µl/ ml) of imidacloprid 5% SC were tested against P. americana, variable range was obtained according to its respective localities. LC50 for SMH was 2.712 µl/ ml, whereas comparatively low values were recorded for KTCH and KLPT (1.966 µl/ ml and 1.318 µl/ ml respectively). The regression analysis of variance further confirmed that there was an increasing trend in mean mortality of insects after 48 hours of treatment [for SMH: b= 3.1± 0.9, F(1,4)= 106.78, P= 0.001, for KTCH: b= 3± 2.63, F(1,4)= 3.42E+ 32, P= 3.48E- 49 and for KLPT: b= 2.7± 0.1, F(1,4)= 729, P= 0.001) (Fig. 1–3(a)].

Bottom Line: 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).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.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology, Lahore College for Women University, Lahore, Pakistan.

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.

No MeSH data available.


Related in: MedlinePlus