DSpace Colección :https://hdl.handle.net/11000/5112024-03-29T01:56:42Z2024-03-29T01:56:42ZChapter 9 - Oil in water nanoemulsion formulations of botanical active substancesPascual-Villalobos, Maria JesusGuirao, PedroDíaz Baños, F. GuillermoCantó-Tejero, ManuelVILLORA, GLORIAhttps://hdl.handle.net/11000/309182024-03-18T07:50:36Z2024-02-01T08:25:48ZTítulo : Chapter 9 - Oil in water nanoemulsion formulations of botanical active substances
Autor : Pascual-Villalobos, Maria Jesus; Guirao, Pedro; Díaz Baños, F. Guillermo; Cantó-Tejero, Manuel; VILLORA, GLORIA
Resumen : Water-based nanoemulsions of insecticidal botanical oils and extracts have advantages over emulsifiable concentrates and macroscopic emulsions, particularly due to the small droplet size (< 300 nm). In this chapter, we explain some concepts and present some examples of applications of nanoformulations of biopesticides. We also present some new data from our recent work on formulating plant essential oils and assessing them against the aphid species Myzus persicae (Homoptera: Aphididae). Lecithin nanoemulsions (1%, v/v) of geraniol, farnesol, and trans-anethole prepared by ultrasound maintained their activity after storage (Repellency Index = 59.6–71.6) and had Z-potential values of < 30 mV measured with a Zetasizer, indicating good stability. Repellent doses (RD50) were in the range of 0.47–2.06% (v/v). Nanoemulsions were prepared with a high speed rotor and tween80 as the surfactant. Citral gives a monodispersed nanoemulsion with 50–100 nm particles, even after dilution. Anise emulsions had at least two populations of particles, one of small sizes (20 nm in diameter) and another of 200–300 nm. When emulsified in water, cis-jasmone, the most active product, had particles of larger sizes (400 nm). Pyrethrum extract gave a reduction in RD50 from 0.131%–0.025% if a nanoemulsion was applied instead of a macroscopic emulsion in the choice laboratory bioassay with M. persicae. However, in greenhouse experiments, the number of aphids on pepper plants was not different between both treatments. Obviously, spraying pyrethrum had insecticidal effects in comparison with a control. On the other hand, the preventive application of citral or anise in pepper plants showed some repellence but only if the binary mixture at doses of 0.1%–0.2% was sprayed. A reduction in the number of aphids per plant was observed. Pyrethrum nano was less toxic to Aphidius colemani (LC90 = 0.064%) than the macroscopic pyrethrum emulsion (LC90 = 0.038%). Citral or anise was much safer for natural enemies (parasitoids) and had no residual contact toxicity up to 0.1%2024-02-01T08:25:48ZViticultura. Técnicas de cultivo de la vid, calidad de la uva y atributos de los vinosSalazar Hernández, Domingo M.Melgarejo Moreno, Pablohttps://hdl.handle.net/11000/54672023-12-22T13:44:02Z2019-11-19T10:35:29ZTítulo : Viticultura. Técnicas de cultivo de la vid, calidad de la uva y atributos de los vinos
Autor : Salazar Hernández, Domingo M.; Melgarejo Moreno, Pablo2019-11-19T10:35:29ZCultivos leñosos: Frutales de zonas áridas. El cultivo del almendroSalazar Hernández, Domingo M.Melgarejo Moreno, Pablohttps://hdl.handle.net/11000/54662022-11-23T09:09:14Z2019-11-19T10:29:16ZTítulo : Cultivos leñosos: Frutales de zonas áridas. El cultivo del almendro
Autor : Salazar Hernández, Domingo M.; Melgarejo Moreno, Pablo2019-11-19T10:29:16ZLa iluminación en los invernaderosMelgarejo Moreno, PabloNavarro Quercop, AntonioLegua Murcia, PilarLidón Noguera, Vicentehttps://hdl.handle.net/11000/54652022-11-23T09:09:14Z2019-11-19T10:22:08ZTítulo : La iluminación en los invernaderos
Autor : Melgarejo Moreno, Pablo; Navarro Quercop, Antonio; Legua Murcia, Pilar; Lidón Noguera, Vicente2019-11-19T10:22:08ZTratado de fruticultura para zonas áridas y semiáridas (Vol. II). Algarrobo, granado y jinjoleroMelgarejo Moreno, PabloSalazar Hernández, Domingo M.https://hdl.handle.net/11000/54102022-11-23T09:09:14Z2019-10-30T10:14:02ZTítulo : Tratado de fruticultura para zonas áridas y semiáridas (Vol. II). Algarrobo, granado y jinjolero
Autor : Melgarejo Moreno, Pablo; Salazar Hernández, Domingo M.2019-10-30T10:14:02ZEl cultivo del algarroboSalazar Hernández, Domingo M.Melgarejo Moreno, PabloLópez Cortés, IsabelMartínez Font, RafaelMartínez Nicolás, Juan JoséHernández García, Franciscahttps://hdl.handle.net/11000/49572022-11-23T09:09:14Z2019-01-18T10:43:02ZTítulo : El cultivo del algarrobo
Autor : Salazar Hernández, Domingo M.; Melgarejo Moreno, Pablo; López Cortés, Isabel; Martínez Font, Rafael; Martínez Nicolás, Juan José; Hernández García, Francisca2019-01-18T10:43:02ZEl minador de los cítricos (Phyllocnistis citrella Stainton)Melgarejo Moreno, PabloMartínez Nicolás, Juan JoséHernández García, FranciscaMartínez Canales, Gabrielhttps://hdl.handle.net/11000/49532022-11-23T09:09:12Z2019-01-16T12:44:21ZTítulo : El minador de los cítricos (Phyllocnistis citrella Stainton)
Autor : Melgarejo Moreno, Pablo; Martínez Nicolás, Juan José; Hernández García, Francisca; Martínez Canales, Gabriel2019-01-16T12:44:21ZPrácticas integradas de viticulturaMartínez Valero, RafaelMelgarejo Moreno, PabloMartínez Nicolás, Juan JoséHernández García, FranciscaMartínez Font, Rafaelhttps://hdl.handle.net/11000/49522022-11-23T09:09:14Z2019-01-16T10:53:48ZTítulo : Prácticas integradas de viticultura
Autor : Martínez Valero, Rafael; Melgarejo Moreno, Pablo; Martínez Nicolás, Juan José; Hernández García, Francisca; Martínez Font, Rafael2019-01-16T10:53:48ZEl cultivo del almendroMelgarejo Moreno, PabloSalazar Hernández, Domingo M.López Cortés, IsabelMartínez Nicolás, Juan JoséHernández García, Franciscahttps://hdl.handle.net/11000/49512022-11-23T09:09:13Z2019-01-16T09:24:43ZTítulo : El cultivo del almendro
Autor : Melgarejo Moreno, Pablo; Salazar Hernández, Domingo M.; López Cortés, Isabel; Martínez Nicolás, Juan José; Hernández García, Francisca2019-01-16T09:24:43ZEl frío invernal, factor limitante para el cultivo frutal. Modelos y métodos para determinar la acumulación de frío y de calor en frutales.Melgarejo Moreno, Pablohttps://hdl.handle.net/11000/49502022-11-23T09:09:15Z2019-01-15T13:37:33ZTítulo : El frío invernal, factor limitante para el cultivo frutal. Modelos y métodos para determinar la acumulación de frío y de calor en frutales.
Autor : Melgarejo Moreno, Pablo2019-01-15T13:37:33Z