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Comparative efficacy of spatial repellents containing d-allethrin and d-trans allethrin against the major dengue vector Aedes aegypti (Linnaeus)

Fatma M. A. El-garj
Fatma M. A. El-garj
, 
Silas W. Avicor
Silas W. Avicor
, 
Mustafa F.F. Wajidi
Mustafa F.F. Wajidi
 and 
Zairi Jaal
Zairi Jaal
   | Jan 31, 2017
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Article Category: Brief communication (Original)
Published Online: Jan 31, 2017
Page range: 313 - 320
DOI: https://doi.org/10.5372/1905-7415.0903.399
Keywords
© 2015 Fatma M. A. El-garj, Silas W. Avicor, Mustafa F.F. Wajidi, Zairi Jaal
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Background

The use of mosquito coils is a common method of protection against mosquito bites and mosquito borne diseases. These coils are widely marketed and used by households in Malaysia to prevent mosquito associated problems.

Objective

To determine the bioefficacy of commercial d-allethrin and d-trans allethrin spatial repellents against the dengue vector Aedes aegypti.

Method

We evaluated the knockdown and mortality effects of spatial repellents containing d-allethrin (0.3% w/w) and d-trans allethrin (0.1% and 0.15% w/w) on Ae. aegypti in a Peet Grady Chamber, relative to a reference product (0.2% w/w d-allethrin).

Results

The spatial repellent containing 0.3% d-allethrin had the shortest knockdown times (KT50 and KT90) and these were significantly different from the other products including the reference coil except the 0.15% d-trans allethrin coil. The spatial repellent containing 0.3% d-allethrin elicited a mortality response of 96%, which was significantly different from the mortality response to the other coils, except for the 0.15% d-trans allethrin formulation.

Conclusions

Spatial repellents containing 0.3% d-allethrin or 0.15% d-trans allethrin had higher efficacies against Ae. aegypti than repellents containing 0.2% w/w d-allethrin or 0.1% d-trans allethrin and their use by households could offer better relief from Ae. aegypti.

eISSN:
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Language:
English
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Journal Subjects:
Medicine, Assistive Professions, Nursing, Basic Medical Science, other, Clinical Medicine
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