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Idesia (Arica)

versión On-line ISSN 0718-3429


CASTRESAN, Jorge Eduardo; ROSENBAUM, Javier  y  GONZALEZ, Laura Alicia. Study of the effectiveness of three essential oils to control aphids on pepper plants Capsicum annuum L. Idesia [online]. 2013, vol.31, n.3, pp.49-58. ISSN 0718-3429.

Aphid is a very common pest in horticultural crops and the three most important pests are: Aphis gossypii (Glover), Myzus persicae (Sulzer) and Macrosiphum euphorbiae (Thomas) (Hemíptera: Aphididae). Aphid causes severe economic losses due to its periodic occurrence and damage caused by both sucking sap from plants and spreading plants diseases through the transmission of viruses, mainly, in horticultural crops. Some essential oils extracted from certain plants have broad-spectrum insecticidal and acaricidal properties on soft-bodied insects; therefore, they may be used as an alternative source for an integrated pest management. The main purpose of this work was to evaluate the repellent effectiveness of various essential oils "treatments", such as Eucalyptus globulus Labill., Rosmarinus officinalis (Linn.), Allium sativum L. on aphids A. gossypii, M. persicae and M. euphorbiae in pepper crops (Hybrid Pepper "Paloma" Capsicum annuum), in greenhouses with or without biosolarization. To achieve this goal, 15 parcels with 15 peppers plants each were arranged in each of these greenhouses. The trial consisted of weekly individual monitoring (20 times in total) and the average number of total aphids (wingless adults + winged aphids + nymphs) and parasitized aphids (mummies) on the underside of 4 medium leaves on 3 plants selected prior to the application of essential oils in each parcel was reported. Each treatment was replicated three (3) times and the data was analyzed using an Analysis of Variance (ANOVA) for a Completely Randomized Design. The trials proved that treatments with garlic essential oils (A. sativum) + soybean oil and Eucalyptus essential oil (E. globulus) + soybean oil modify aphids' behavior resulting in a lower number of these insects.

Palabras clave : aphids; essential oils; eucalyptus; rosemary; garlic; pepper.

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