YEGUERMAN Cristhian Alan
Ecofriendly Approach for the Control of a Common Insect Pest in the Food Industry, Combining Polymeric Nanoparticles and Post-application Temperatures
JESSER, E.; YEGUERMAN, C.; STEFANAZZI, N.; GOMEZ, R.; MURRAY, A. P.; FERRERO, A. A.; WERDIN-GONZÁLEZ, J. O.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
AMER CHEMICAL SOC
Año: 2020 vol. 68 p. 5951 - 5958
One of the most common insect pests is Plodia interpunctella (Hübner) (Lepidoptera: Pyralidae), which affectsdifferent food commodities. A new effective approach for the management of insect pests is the development of new formulationsbased on essential oils (EO). However, few works informed about the relationship between insecticidal activity of EO or essentialoils loaded polymeric nanoparticles (EOPN) and post-application temperature. In our work, palmarosa [Cymbopogon martinii(Roxb.) Watson], geranium (Geranium maculatum L.), and peppermint (Mentha piperita L.) oils were formulated in a polyethyleneglycol 6000 matrix to obtain EOPN. Geranium and palmarosa EOPN had sizes of 259 and 191 nm, respectively; the encapsulationefficiency (EE) was close to 90%, and the samples were monodisperse. The sizes from peppermint EOPN were around 380 nm, withan EE of 72%, and were polidisperse. In a contact toxicity bioassay, the insecticidal effect of the oils was increased by all EOPN, withpalmarosa oil being the most toxic. In addition, the oils and their nanoparticles showed a significantly negative temperaturecoefficient when applied by contact. In a fumigant bioassay, just palmarosa and peppermint EOPN enhanced the oil activity andpalmarosa EO and EOPN showed the highest toxic effect. In this case, the EO and EOPN insecticidal activity was unaffected byenvironmental temperature variation.