Efeito residual do extrato de Annona coriaceasobre Aedes aegypti
Autor(es): Dill, E. M.; Pereira, M. J. B.; Costa, M. S.
Resumo: Fhe production of extracts of the Annonaceae family is considered an effective al ternative for the control of the dengue vector, and its applicability is related to the persistence of the product in the environment. The aim of the present study was to evaluate the residual effect of Annona coriacea (Mart., 1841) extract on the development of Aedes aegypti (Linneaus, 1762). Plastic containers with the capacity of 25 liters were used to distribute the concentrations of 50 and 100 ppm of the extract, and DMSO (1%) and water were used as a control. These containers were exposed in the outer area of the laboratory. On days 1, 8, 15, 30, 45 after treatment application, 1.3 liters of each treatment was collected as a sample. Eight replicates with 25 larvae were applied for the two treatments, and four replicates for the control group. Evaluation of the mortality of larvae was carried out daily and the mortality of pupae and adults was observed. The experiment was conducted randomly in a 4 x 5 factorial scheme. The data was submitted to analysis of variance by F test, and the means compared by Tukey Test (p < 0.05). The concentrations of 100 ppm of the extract of A. coriacea showed residual effects with 100% mortality of larvae during the period of 15 days, and was not effective on the death of pupae and adults. Therefore, the residual effect presented by A. coriacea on A. aegypti can be used in future management programs for controlling the vector of dengue.Original Abstract: A producao de extratos vegetais da familia Annonaceae e uma alternativa eficaz no controle do vetor da dengue, e sua aplicabilidade esta relacionada a persistencia do produto no ambiente. O objetivo desta pesquisa foi avaliar o efeito residual do extrato de Annona coriacea (Mart., 1841) sobre a mortalidade de Aedes aegvpti (Linnaeus, 1762). Foram utilizados recipientes plasticos de 25 L, para distribuir as concentracoes de 50 e 100 ppm do extrato, e DMSO (1%) e agua foram usados como controle. Estes recipientes ficaram expostos na area externa do laboratorio. Nos dias 1, 8, 15, 30 e 45 dias apos o preparo, coletou-se uma amostra de 1,3 L de cada tratamento. Foram utilizadas oito replicas com 25 larvas de A. aegypti para os dois tratamentos, e quatro replicas para os controles. O registro da mortalidade das larvas foi feito diariamente e foi observada a mortalidade de pupas e adultos. O experimento foi conduzido aleatoriamente, no esquema fatorial 4 x 5. Os dados foram submetidos a analise de variancia pelo teste F e as medias dos tratamentos foram comparadas pelo teste de Tukey (p < 0, 05). A concentracao de 100 ppm do extrato de A. coriacea apresentou efeito residual de 100% de mortalidade de larvas durante o periodo de 15 dias, e nao houve eficiencia na mortalidade de pupas e adultos. Portanto, o efeito residual apresentado por A. coriacea sobre larvas de A. negypti indica que o extrato desta planta pode ser utilizado em programas de controle da dengue.
Palavras-Chave: Sulphur oxides; Pupae; Pest control; Larval development; Environmental factors; Aquatic insects; Mortality causes; Mortality; Data processing; Dengue; Vectors; Residual effects; Plastics; Aedes aegypti; Annonaceae; Annona
Imprenta: Arquivos do Instituto Biologico, v. 79, n. 4, p. 595-601, 2012.
Descritores: Aedes aegypti - Dengue
Data de publicação: 2012
