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Behavioral and toxicological responses of Rhodnius prolixus and Triatoma infestans (Hemiptera: Reduviidae) to 10 monoterpene alcohols.
Moretti, A N; Zerba, E N; Alzogaray, Raúl A.
Afiliação
  • Moretti AN; Centro de Investigaciones de Plagas e Insecticidas (CIPEIN/ UNIDEF-CONICET), J.B. de La Salle 4397, (1603) Villa Martelli, Buenos Aires, Argentina.
J Med Entomol ; 50(5): 1046-54, 2013 Sep.
Article em En | MEDLINE | ID: mdl-24180109
The effect on locomotor activity, the repellency, and the knock-down produced by 10 monoterpene alcohols were evaluated on first-instar nymphs of Rhodnius prolixus and Triatoma infestans, vectors of Chagas disease. A video tracking technique was used to evaluate locomotor activity and repellency by exposure to papers impregnated with monoterpenes. Eugenol on R. prolixus and (S)-cis-verbenol on T. infestans did not modify the locomotor activity. The remaining monoterpenes produced hyperactivity on both species, although the concentration required was at least a 1,000 times higher than that of deltamethrin (positive control). Carvacrol, eugenol, and geraniol resulted as repellent as N,N-diethyl-m-toluamide (positive control) for both species. A similar result was observed for almost every monoterpene on T. infestans. Knock-down effect was evaluated by exposing the nymphs in closed recipients. The order of increasing toxicity on R. prolixus was (KT50 values in min): geraniol (213.7) < alpha-terpineol (164.5) < linalool (124.2) < carvacrol (111.6) < eugenol (89.8) < thymol (78.9), and on T. infestans: alpha-terpineol (289.8) < eugenol (221.3) < carvacrol (164.2) < linalool (154.9) < thymol (96.7). All monoterpenes were less toxic than the positive control, dichlorvos (3.6 min for R. prolixus and 3.9 min for T. infestans). After 7 h of exposure, (-)-carveol, citronellol, and menthol (on both species) and geraniol (on T. infestans) produced < 50% of knock-down. After these results, it is worthwhile to explore more deeply the potential of these compounds as tools for controlling Chagas disease vectors.
Assuntos
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Base de dados: MEDLINE Assunto principal: Rhodnius / Triatoma / Controle de Insetos / Monoterpenos / Repelentes de Insetos / Atividade Motora Tipo de estudo: Evaluation_studies Limite: Animals Idioma: En Ano de publicação: 2013 Tipo de documento: Article
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Base de dados: MEDLINE Assunto principal: Rhodnius / Triatoma / Controle de Insetos / Monoterpenos / Repelentes de Insetos / Atividade Motora Tipo de estudo: Evaluation_studies Limite: Animals Idioma: En Ano de publicação: 2013 Tipo de documento: Article