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Agricultura Técnica
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0365-2807
EISSN: 0365-2807
Vol. 66, No. 3, 2006, pp. 256-263
Bioline Code: at06027
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Agricultura Técnica, Vol. 66, No. 3, 2006, pp. 256-263

 en Use of lemongrass ( Cymbopogon citratus check for this species in other resources Stapf) essential oil as a repellent of Diuraphis noxia check for this species in other resources Kurdj. (Hemiptera: Aphididae) in wheat
Ricci, Mónica; Padín, Susana; Ringuelet, Jorge & Kahan, Andrea

Abstract

The use of natural products such as essential oils and plant extracts is an alternative for integrated pest management (IPM). The objective of this work was to evaluate the repellent effect of lemongrass ( Cymbopogon citratus check for this species in other resources Stapf) essential oil on the Russian wheat aphid ( Diuraphis noxia check for this species in other resources Kurdj.) on wheat ( Triticum aestivum check for this species in other resources L.) plants. The essential oil was formulated in an aqueous solution using 5% propylene glycol and 0.5% soybean lecithin as emulsifiers. The concentrations tested were: 0.5, 1, 2, 3 and 4% in aqueous solution using 5% propylenglicol and 0.5% soybean lecithin as emulsifiers, with five replicates per treatment. Two application techniques were used: impregnated paper and direct pulverization on wheat plants at the two leaves stage.After the application ten aphids were placed in each pot. Repellence evaluation was carried out 6 h after treatment, counting aphids on plants and expressing it as a percentage of repellence. The results obtained were transformed into a percentage of repellence and analyzed using ANOVA and the Tukey test (P = 0.05). For the application techniques repellence of 66.07 and 74.33% was obtained for pulverization and impregnated paper, respectively. On evaluating the emulsifier formulations, soybean lecithin and propylenglicol, the repellence percentage was 64.78 and 75.63%, respectively. For the concentrations of lemongrass, the repellence percentage of lemongrass essential oil ranged from 65 to 89%. It is concluded that the solutions demonstrated repellent activity against D. noxia.

Keywords
Cymbopogon citratus, lemongrass, Russian wheat aphid.

 
 es Utilización de aceite esencial de lemongrass ( Cymbopogon citratus check for this species in other resources Stapf) como repelente de Diuraphis noxia check for this species in other resources Kurdj. (Hemiptera: Aphididae) en trigo
Ricci, Mónica; Padín, Susana; Ringuelet, Jorge & Kahan, Andrea

Resumen

Una herramienta alternativa para el manejo integrado de plagas, es la utilización de productos naturales, como aceites esenciales y extractos vegetales. El objetivo del trabajo fue evaluar la actividad repelente del aceite esencial de lemongrass ( Cymbopogon citratus check for this species in other resources Stapf) sobre el pulgón ruso ( Diuraphis noxia check for this species in other resources Kurdj.) en trigo ( Triticum aestivum check for this species in other resources L.). El aceite esencial se formuló en solución acuosa empleando como emulsionantes propilenglicol al 5% y lecitina de soja al 0,5%. Las concentraciones evaluadas fueron 0,5; 1; 2; 3 y 4% y testigos en blanco, con cinco repeticiones por tratamiento. Se utilizaron dos técnicas de aplicación: impregnación de papeles y pulverización directa, cuando las plantas de trigo se encontraban al estado de dos hojas completamente desarrolladas. Luego de la aplicación, se colocaron 10 pulgones adultos por maceta y se realizó el recuento a las 6 h. Los resultados obtenidos se transformaron en porcentaje de repelencia y se analizaron por ANDEVA y test de Tukey (P = 0,05). Para las técnicas de aplicación, se obtuvo un porcentaje de repelencia de 66,07 y 74,33% para pulverización e impregnación de papeles, respectivamente. Al evaluar las formulaciones con los dos emulsionantes, lecitina de soja y propilenglicol, el porcentaje de repelencia fue de 64,78 y 75,63%, respectivamente. Para las concentraciones de lemongrass, el porcentaje de repelencia osciló entre 65 y 89%. Se concluye que los volátiles de C. citratus demostraron poseer actividad repelente sobre D. noxia.

Palabras-clave
Cymbopogon citratus, lemongrass, pulgón ruso del trigo.

 
© Copyright 2006 - Instituto de Investigaciones Agropecuarias, INIA (Chile).
Alternative site location: http://www.inia.cl/at/agritec.htm

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