Evaluation of liquid Bacillus thuringiensis var. israelensis products for control of Australian Aedes arbovirus vectors.
J Am Mosq Control Assoc
; 17(1): 8-12, 2001 Mar.
Article
en En
| MEDLINE
| ID: mdl-11345425
ABSTRACT
Laboratory bioassay studies were conducted in southeast Queensland, Australia, on the efficacy of Teknar, VectoBac 12AS, and Cybate (active ingredient 1,200 international toxic units Bacillus thuringiensis var. israelensis [Bti]) against 3rd instars of the arbovirus vectors Aedes aegypti, Ae. notoscriptus, Ae. vigilax, and Ae. camptorhynchus. Probit analyses were then used to determine LD50 (median lethal dose), LD50, and lethal dose ratios (LDR). Aedes aegypti and Ae. notoscriptus, both container-habitat species, tolerated the highest Bti concentrations compared with saltmarsh Ae. vigilax and Ae. camptorhynchus. For example, the LDR for Ae. vigilax versus Ae. notoscriptus exposed to Cybate was 0.14 (95% confidence limit [CL] 0.03-0.61). Similarly, the Cybate LDR for Ae. camptorhynchus versus Ae. notoscriptus was 0.22 (95% CL 0.07-0.70). Teknar produced similar results with an LDR of 0.21 (95% CL 0.04-1.10) for Aedes vigilax versus Aedes notoscriptus. Differences in product efficacy were found when tested against the 2 container-breeding species. Cybate was less effective than Teknar with LDRs of 1.55 (95% CL 0.65-3.67) and 1.87 (95% CL 0.68-5.15) for Aedes aegypti and Ae. notoscriptus, respectively. The significant differences in susceptibility between mosquito species and varying efficacy between products highlight the importance of evaluating concentration-response data prior to contracting with distributors of mosquito control products. This information is crucial to resistance management strategies.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Control de Mosquitos
Límite:
Animals
País/Región como asunto:
Oceania
Idioma:
En
Revista:
J Am Mosq Control Assoc
Asunto de la revista:
MEDICINA TROPICAL
Año:
2001
Tipo del documento:
Article
País de afiliación:
Australia