RESUMO
To control urban pests, especially cockroaches of the Periplaneta americana species, various pesticides have been developed that are increasingly potent and effective. However, the unrestrained application of pesticides has had negative consequences, such as the disappearance of some useful insect species and, consequently, the appearance of new pests, both in the countryside and cities. Due to the current scenario, it was necessary to search for new alternatives for the control of these insects. Among the species studied, Copaíba stood out. The oils were analyzed using GC-MS, b-caryophyllene and a-bergamotene being the predominant compounds. Repellency tests were performed with three different concentrations of C. officinalis and C. reticulata, 500 µg/mL, 250 µg/mL and 125 µg/mL, in triplicate. It can be observed that the oil of C. officinalis was more repellent to the nymphs at concentrations of 500 µg/mL and 250 µg/mL, however, when the behavior in nymphs exposed to the concentration of 125 µg/mL was compared, it was noted that C. reticulata oil was more repellent at this concentration. Copaifera has shown promising activity as a repellent against arthropods owing to the complex chemical composition of its oils
Assuntos
Periplaneta/classificação , Óleos de Plantas/análise , Estudo Comparativo , Fabaceae/classificação , Praguicidas/farmacologia , Repelentes de Insetos/classificaçãoRESUMO
Casi todos necesitamos en alguna oportunidad un repelente contra insectos, ya sea en un asado al aire libre o en un paseo por bosques o playas. Sin embargo, existe preocupación por la seguridad del empleo de dietiltoluamida (DEET) que es usado en casi todos los productos porque se han comunicado reacciones adversas y la gente tiene miedo de aplicarlos en sus niños. ¿Cuáles son efectivo e inocuos?. Los autores revisan los principales estudios en relación a los repelentes de insectos y proponen recomendaciones para un uso óptimo