Efecto de extractos vegetales en el control de ácaros en condiciones de laboratorio

Currently, agricultural production faces several phytosanitary problems, among them the attack of pests such as the mite, which causes losses of up to 26% of productivity. For this reason, the effect of emulsified essential oils of rue (Ruta graveolens) and dill (Anethum graveolens) at concentrations of 25% and 50% on the mite Tetranychus urticae was evaluated under controlled conditions. The experimental research was carried out at the Technical University of Cotopaxi in the plant protection laboratory using a completely randomized design (CRD) with 1 absolute control plus 4 treatments from the variables essential oils and concentrations, each with 6 replicates. The trial was developed in 4 phases: propagation of mites in bean plants, preparation of the emulsified essential oils, evaluation of the emulsified oils on mite control and, as a last phase, chromatographic analysis. The results show the high efficiency of the essential oils, highlighting with the highest percentage of dead individuals 90.83%, the oils of dill at 25% and rue at 50% concentration, noting that the concentrations of the oils studied do not present significant differences. The analysis of gas chromatography coupled to mass spectrometry indicates that trans-Anetol 75.88%; Alpha-thijone 10.44%; Alpha-phellandrene 3.56% and Methylchavicol 3.10% are the main components of dill oil while in rue oil predominates 2-Un decanone 46.88%; 2 Nonanone 27.26% and Isomaturnin 7.66%, results that indicate that the synergy of the components of the essential oils studied has a high acaricidal effect.

• Hlavní autor: Jimenez Balarezo, Lordan Paul (author)
• Médium: masterThesis
• Jazyk: spa
• Vydáno: 2023
• Témata: ACEITE ESENCIAL; RUTA GRAVEOLENS; EMULSIÓN; ANETHUM GRAVEOLENS; SANIDAD; VEGETAL
• On-line přístup: http://repositorio.utc.edu.ec/handle/27000/10802