Ringuelet, Jorge Abel; Ocampo, Rafael; Henning, Cynthia; Padín, Susana; Urrutia, María Inés and Dal Bello, Gustavo (2014) Actividad insecticida del aceite esencial de Lippia alba (Mill.) N. E. Brown sobre Tribolium castaneum Herbst. en granos de trigo (Triticum aestivum L.). [Insecticidal activity of the essential oil of Lippia alba (Mill.) N. E. Brown on Tribolium castaneum Herbst. in stored wheat grains.] Revista Brasileira de Agroecologia, 9 (2), pp. 214-222.
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Document available online at: http://www.aba-agroecologia.org.br/revistas/index.php/rbagroecologia/article/view/15442/10204
Summary
Tribolium castaneum (Coleoptera: Tenebrionidae) es un insecto plaga de granos, muy destructivo en la etapa de almacenamiento y altamente resistente a los fitosanitarios sintéticos. Por esta razón su control químico se realiza con altas concentraciones de insecticidas que aumentan la contaminación ambiental y los peligros para la salud humana. Las tendências actuales en el manejo integrado de plagas se orientan hacia el uso de plaguicidas biológicos o biopesticidas como los extractos vegetales, que no generan resistencia y son de baja toxicidad. En ese sentido, el objetivo del presente trabajo fue estudiar la actividad repelente e insecticida del aceite esencial de Lippia alba (Verbenaceae) quimiotipo carvona-limoneno sobre adultos de T. castaneum, en granos de trigo. La repelencia fue evaluada a las 2 y 24 h y a los 7, 14 y 21 días utilizando un olfatómetro y una concentración Del aceite esencial de 52 μL L-1 de aire. La determinación del efecto insecticida se realizó por las técnicas de pulverización y de impregnación de papel con el aceite esencial a concentraciones de 131, 263 y 526 μL L-1 de aire, registrándose la mortalidad a las 24 h y a los 7 días post tratamiento. La repelencia que produjo el aceite fue significativa a altamente significativa con respecto al control y para todos los períodos analizados. En relación a la mortalidad, comparando las técnicas de aplicación del aceite esencial empleando la mayor concentración, a las 24 h se encontraron diferencias altamente significativas a favor de la pulverización, mientras que a los 7 días no existieron diferencias entre ambos métodos. Se concluye que el aceite esencial de L. alba representaría una alternativa no contaminante para prevenir y controlar el ataque de adultos de T. castaneum en granos almacenados.
Summary translation
Tribolium castaneum (Coleoptera: Tenebrionidae) is an insect pest of stored grain, very destructive and highly resistant to synthetic pesticides. Therefore, the chemical control of this pest is performed with high concentrations of insecticides which increase environmental contamination as well as the risks to human health. Current trends in integrated pest management are focused on the use of biological pesticides such as plant extracts, which do not generate resistance and are of low toxicity. In that sense, the objective of the present research was to study the repellent and insecticidal activity of the essential oil of Lippia alba (Verbenaceae) chemotype carvone-limonene on adults of T. castaneum, in wheat grain. The repellency was evaluated using an olfactometer with a concentration of essential oil of 52 μL L-1 air, at 2 and 24 h, and 7, 14 and 21 days. The insecticide effect was determined by the spraying technique and by the impregnation of paper with the essential oil at concentrations of 131, 263 and 526 μL L-1 air, recording mortalities at 24 h and 7 days post treatment. Significant to highly significant differences were observed for repellency respect to control in all the analyzed periods. In relation to mortality, comparing the techniques of application of essential oil using the highest concentration, at 24 h significant differences in favor of spraying were found, while at 7 days, there were no differences between both methods. It is concluded that the essential oil of L. alba would represent an environmentally friendly alternative to prevent and control the attack of adults of T. castaneum in stored grains.
| EPrint Type: | Journal paper |
|---|---|
| Keywords: | Trigo almacenado, Tribolium castaneum, Lippia alba, Aceite esencial, Carvona-limoneno, Repelencia, Mortalidad. Stored-wheat grain, Tribolium castaneum, Lippia alba, Essential oil, Carvone-limonene, Repellency, Mortality. |
| Agrovoc keywords: | Language Value URI English Agroecology http://aims.fao.org/aos/agrovoc/c_92381 English Tribolium castaneum http://aims.fao.org/aos/agrovoc/c_30175 English Carvone http://aims.fao.org/aos/agrovoc/c_24980 English Mortality http://aims.fao.org/aos/agrovoc/c_4945 English Essential oils http://aims.fao.org/aos/agrovoc/c_2669 English wheat UNSPECIFIED English Lippia http://aims.fao.org/aos/agrovoc/c_37446 English Botanical insecticides http://aims.fao.org/aos/agrovoc/c_1021 |
| Subjects: | Crop husbandry > Production systems Farming Systems Crop husbandry > Production systems > Cereals, pulses and oilseeds |
| Research affiliation: | Brazil > Other organizations |
| ISSN: | 1980-9735 |
| Related Links: | http://www.aba-agroecologia.org.br/revistas/index.php/rbagroecologia/index |
| Deposited By: | Pinto, Gabriela Franco |
| ID Code: | 27407 |
| Deposited On: | 31 Mar 2015 16:13 |
| Last Modified: | 31 Mar 2015 16:13 |
| Document Language: | Spanish/Español |
| Status: | Published |
| Refereed: | Peer-reviewed and accepted |
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