: The mosquito Aedes albopictus is a vector of several harmful viruses, necessitating the development of safer and more sustainable repellents than DEET. This study evaluated the potential of plant-based EOs extracted via steam distillation from Aloysia citrodora and Bursera graveolens plants harvested in Ecuador. A. citrodora EO exhibited a high sensory pleasantness with a citral-like aroma, while B. graveolens EO had lower sensory appeal due to off-flavors. At 200 µL L-1, B. graveolens EO demonstrated strong ovideterrent activity, reducing egg laying by 64%, whereas A. citrodora EO displayed the highest larvicidal activity with an LC50 value of 88.54 µL L-1. Both EOs, applied at 0.20 µL cm-2 on human skin, provided comparable repellency for over 45 min. The RD50 values were 0.104 µL cm-2 for A. citrodora EO and 0.136 µL cm-2 for B. graveolens EO. When compared to DEET at 0.04 µL cm-2, no significant differences in repellency were observed within the first 15 min post-application. These findings suggest that both EOs are effective alternatives to synthetic repellents, and A. citrodora EO emerges as a promising candidate due to its superior sensory attributes and larvicidal activity.
Chemical Profiling, Sensory Qualities, and Bioactivities of Essential Oils Obtained from Aloysia citrodora and Bursera graveolens Ecuadorian Plants Against the Mosquito Aedes albopictus (Skuse) (Diptera: Culicidae)
Parichanon, PrangthipPrimo
;Ascrizzi, RobertaSecondo
;Tani, Camilla;Taglieri, Isabella;Flamini, Guido;Venturi, FrancescaPenultimo
;Conti, Barbara
Ultimo
2025-01-01
Abstract
: The mosquito Aedes albopictus is a vector of several harmful viruses, necessitating the development of safer and more sustainable repellents than DEET. This study evaluated the potential of plant-based EOs extracted via steam distillation from Aloysia citrodora and Bursera graveolens plants harvested in Ecuador. A. citrodora EO exhibited a high sensory pleasantness with a citral-like aroma, while B. graveolens EO had lower sensory appeal due to off-flavors. At 200 µL L-1, B. graveolens EO demonstrated strong ovideterrent activity, reducing egg laying by 64%, whereas A. citrodora EO displayed the highest larvicidal activity with an LC50 value of 88.54 µL L-1. Both EOs, applied at 0.20 µL cm-2 on human skin, provided comparable repellency for over 45 min. The RD50 values were 0.104 µL cm-2 for A. citrodora EO and 0.136 µL cm-2 for B. graveolens EO. When compared to DEET at 0.04 µL cm-2, no significant differences in repellency were observed within the first 15 min post-application. These findings suggest that both EOs are effective alternatives to synthetic repellents, and A. citrodora EO emerges as a promising candidate due to its superior sensory attributes and larvicidal activity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.