Residual efficacy of deltamethrin applied to foliage against Malaysian Aedes aegypti (L.) and Aedes albopictus (Skuse)
https://doi.org/10.47665/tb.38.2.053
- Author:
Mohd-Noor, S.N.
1
;
Nur-Rasyidah, I.
1
;
Muhammad-Iqbal, M.N.
1
;
Nguyen, T.B.D.
2
,
3
;
Lee, H.L.
1
;
Nurulhusna, A.H.
1
Author Information
1. Medical Entomology Unit, WHO Collaborating Centre for Vectors, Institute for Medical Research, Ministry of Health, Malaysia, National Institutes of Health, Block C, Jalan Setia Murni U13/52, Seksyen U13, Setia Alam, 40170 Shah Alam, Malaysia
2. School of Diploma in Applied Parasitology and Entomology, SEAMEO TROPMED Regional Center Malaysia, Institute for Medical Research, Ministry of Health, Malaysia, National Institutes of Health, Block A, Jalan Setia Murni U10/53, Seksyen U10, Setia Alam, 40170 Shah Alam, Malaysia&
3. National Institute of Malariology, Parasitology, and Entomology, 34 Trung Van, Nam Tu Liem, Hanoi, Vietnam
- Publication Type:Journal Article
- Keywords:
Barrier spraying;
deltamethrin;
suspension concentrate;
mosquito control
- From:Tropical Biomedicine
2021;38(No.2):165-170
- CountryMalaysia
- Language:English
-
Abstract:
The spraying of insecticide on foliage to provide an insecticidal barrier may serve as part of the vector control measures to combat the increasing threat of Aedes-borne diseases. The effectiveness of insecticide barrier spraying was evaluated by assessing the residual efficacy of deltamethrin sprayed on foliage against Malaysian Ae. aegypti (L.) and Ae. albopictus (Skuse). In this semi-field study, landscape plants grown within the vicinity of the Institute for Medical Research (IMR), Malaysia, were treated with deltamethrin suspension concentrate (SC) with the dosage of 30 mg/m2 and 50 mg/m2 in three rounds of spraying. Deltamethrin residual activity on treated and untreated leaves was investigated using standard WHO cone bioassays. Wild Aedes populations at both deltamethrin-treated and untreated plant clusters were monitored by ovitrap surveillance. Ovitrap monitoring revealed that the mean number of Ae. albopictus larvae at deltamethrin-treated were significantly lower than the mean number of larvae of the same species at the untreated plant cluster. Cone bioassay results showed that the insecticide remained effective for up to 4 weeks (> 80% mortality), but the insecticide residual activity was affected by rainfall. These results suggest that insecticide barrier spraying is a promising tool and may be used along with other mosquito control tools such as indoor residual spray and space spraying to reduce the dengue burden.
- Full text:8.2021my1253.pdf
