A long-lasting biological larvicide against the dengue vector mosquito Aedes albopictus.
Aedes albopictus
Bacillus thuringiensis subspecies Israelensis
Larvicide
dengue
Journal
Pest management science
ISSN: 1526-4998
Titre abrégé: Pest Manag Sci
Pays: England
ID NLM: 100898744
Informations de publication
Date de publication:
Feb 2021
Feb 2021
Historique:
received:
30
04
2020
revised:
19
08
2020
accepted:
01
09
2020
pubmed:
2
9
2020
medline:
15
1
2021
entrez:
2
9
2020
Statut:
ppublish
Résumé
Aedes albopictus is the primary vector of mosquito-borne diseases, including dengue and chikungunya, in China. The management of vector mosquitoes is the primary strategy for the control of such infectious diseases. The gravid Ae. albopictus prefers to skip-oviposit its eggs into different small water containers, and the management of these breeding places is critical for mosquito control. Bacillus thuringiensis subspecies Israelensis (Bti) is a useful biological larvicide, but the effective period of the currently available commercial product is relatively short. This study aimed to develop a long-lasting formulation of Bti to control the dengue vector mosquito Ae. albopictus. Water-soluble polyethylene glycols and water-insoluble hexadecanol were mixed with Bti to develop the long-lasting formulation Bti-BLOCK, based on the solid dispersion technique. The controlled release of Bti-BLOCK and its effect on Ae. albopictus were assayed in the laboratory and in the field. The results showed that Bti toxins were slowly released from Bti-BLOCK into the water and maintained at an effective dose for at least 6 months. Bti-BLOCK caused high mortality during the immature stage (>90%) and achieved full inhibition during pupation (100%). The efficacy lasted at least 12 weeks in the laboratory and 6 weeks in the field. Furthermore, we confirmed an 89% reduction in Ae. albopictus density and a reduction in the R We developed a long-lasting biological larvicide, Bti-BLOCK, which displayed very good efficacy in the control of the dengue vector mosquito Ae. albopictus.
Sections du résumé
BACKGROUND
BACKGROUND
Aedes albopictus is the primary vector of mosquito-borne diseases, including dengue and chikungunya, in China. The management of vector mosquitoes is the primary strategy for the control of such infectious diseases. The gravid Ae. albopictus prefers to skip-oviposit its eggs into different small water containers, and the management of these breeding places is critical for mosquito control. Bacillus thuringiensis subspecies Israelensis (Bti) is a useful biological larvicide, but the effective period of the currently available commercial product is relatively short. This study aimed to develop a long-lasting formulation of Bti to control the dengue vector mosquito Ae. albopictus.
RESULTS
RESULTS
Water-soluble polyethylene glycols and water-insoluble hexadecanol were mixed with Bti to develop the long-lasting formulation Bti-BLOCK, based on the solid dispersion technique. The controlled release of Bti-BLOCK and its effect on Ae. albopictus were assayed in the laboratory and in the field. The results showed that Bti toxins were slowly released from Bti-BLOCK into the water and maintained at an effective dose for at least 6 months. Bti-BLOCK caused high mortality during the immature stage (>90%) and achieved full inhibition during pupation (100%). The efficacy lasted at least 12 weeks in the laboratory and 6 weeks in the field. Furthermore, we confirmed an 89% reduction in Ae. albopictus density and a reduction in the R
CONCLUSIONS
CONCLUSIONS
We developed a long-lasting biological larvicide, Bti-BLOCK, which displayed very good efficacy in the control of the dengue vector mosquito Ae. albopictus.
Substances chimiques
Insecticides
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
741-748Subventions
Organisme : National Key R&D Program of China
ID : 2020YFC1200100
Organisme : Guangzhou Synergy Innovation Key Program for Health
ID : 201803040006
Organisme : Guangzhou Synergy Innovation Key Program for Health
ID : 201807010005
Organisme : NIH HHS
ID : AI136850
Pays : United States
Organisme : National Key R&D Program of China
ID : 2019YFC1200800
Organisme : National Natural Science Foundation of China
ID : 31830087
Organisme : National Natural Science Foundation of China
ID : 81829004
Organisme : NIH HHS
ID : AI136850
Pays : United States
Informations de copyright
© 2020 Society of Chemical Industry.
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