Evaluation of the residual effect of temephos on Aedes aegypti (Diptera, Culicidae) larvae in artificial containers in Manaus, Amazonas State, Brazil
Cad. saúde pública
;
18(6): 1529-1536, nov.-dez. 2002. tab, graf
Article
in English
| LILACS
| ID: lil-326988
RESUMO
Trial tests and container observations were conducted in households to verify the residual effect of temephos in Manaus, Amazonas State, Brazil. Three plastic buckets, three tin cans, and three tires filled with water from an artesian well and larvicide were used in the experiment, with twenty-five third-instar larvae, which remained exposed for 24h, followed by mortality readings. The same types of containers were selected from common households. Collection and counts followed by chemical treatment were carried out on the larvae that were found. Follow-up was performed weekly to verify recolonization by Aedes aegypti.The experiment showed 100 percent mortality in the plastic buckets until day 90, and 80 percent in the tin cans until day 30, decreasing from day 45 onwards. Mortality in the tires decreased to 35 percent in the first month. Household results showed 100 percent mortality for all containers after 24h and differentiated values in the subsequent readings. Larvae were observed on day 35 in a tin can and on day 21 in a gallon can. There was a large diversity of results in the tires, with recolonization observed from day 7 onwards
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Temefos
/
Pesticide Residues
/
Mosquito Control
/
Aedes
/
Insecticides, Organophosphate
Limits:
Animals
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Cad. saúde pública
Journal subject:
Public Health
/
Toxicology
Year:
2002
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Instituto Nacional de Pesquisas da Amazônia/BR
/
Universidade Estadual do Maranhäo/BR
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