Lutz Alejandra, Sfara Valeria, Alzogaray Raúl Adolfo
Cátedra de Sanidad Vegetal, Departamento de Producción Vegetal, Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Provincia de Santa Fe, Argentina.
Centro de Investigaciones de Plagas e Insecticidas (CIPEIN-UNIDEF-CONICET), JB de La Salle 4397, (1603) Villa Martelli, Provincia de Buenos Aires, Argentina Instituto de Investigación e Ingeniería Ambiental, Universidad Nacional de San Martín, San Martín, Provincia de Buenos Aires, Argentina.
J Insect Sci. 2014 Jan 1;14. doi: 10.1093/jisesa/ieu116. Print 2014.
Botanical monoterpenes are secondary metabolites present in essential oils produced by plants. Some of them are insect repellents. The bloodsucking bug Rhodnius prolixus Ståhl (Hemiptera: Reduviidae) is one of the main vectors of Chagas disease in the north of South America and some countries in Central America. In this study, we studied the repellence produced by two monoterpenes, menthyl acetate and geraniol, on fifth instar nymphs of R. prolixus. In the absence of other stimuli, both menthyl acetate and geraniol produced a repellent effect from 740 μg/cm(2) and 74 μg/cm(2), respectively. Pre-exposure to each monoterpene reduced the repellent activity produced by the same substance. Additionally, pre-exposure to one monoterpene decreased the behavioral response of the nymphs to the other one. The repellent effect of both monoterpenes also decreased when nymphs' antennae were previously treated with the nitric oxide donor S-nitroso-N-acetyl-cysteine.
植物单萜是植物产生的精油中的次生代谢产物。其中一些是驱虫剂。吸血臭虫罗得西亚锥蝽(半翅目:猎蝽科)是南美洲北部和中美洲一些国家恰加斯病的主要传播媒介之一。在本研究中,我们研究了两种单萜——乙酸薄荷酯和香叶醇对罗得西亚锥蝽五龄若虫的驱避作用。在没有其他刺激的情况下,乙酸薄荷酯和香叶醇分别从740μg/cm²和74μg/cm²开始产生驱避效果。预先接触每种单萜会降低同一种物质产生的驱避活性。此外,预先接触一种单萜会降低若虫对另一种单萜的行为反应。当若虫的触角预先用一氧化氮供体S-亚硝基-N-乙酰半胱氨酸处理时,两种单萜的驱避效果也会降低。