The alternative use of plant essential oils as pesticide, repellent and/or antifeedant has been emphasized as an important tool in integrated pest management (IPM), promoted by the growing interest in methods that fulfil requirements of efficiency, safety, selectivity, technically feasible and environmentally safe. The objective of this work was to determine the pesticide potential of essential oils of rosemary pepper (Lippia origanoides Kunth; Verbenaceae), citronella (Cymbopogon winterianus Jowitt; Poaceae) and lemongrass (Cymbopogon citratus [DC.] Stapf; Poaceae) to control fall armyworm (Spodoptera frugiperda [J.E. Smith]; Lepidoptera: Noctuidae). Ovicidal, larvicidal and pupicidal activity was evaluated with five dosages (0.1%, 0.5%, 1.0%, 2.5% and 5.0% v/v) and a negative control (neutral detergent at 5.0% v/v). Unhatched eggs, mortality of caterpillars and non-emerged adults were recorded using ovicidal and pupicidal percentage, and median lethal doses (LD50) to caterpillars. The essential oils showed insecticidal activity on the egg, caterpillar 3 rd instars and pupae stages, highlighting the rapid action and high mortality rates caused by the L. origanoides essential oil, which registered, at lowest dosage, average 97.8% ovicidal activity and 81.3% pupicidal activity; in addition to LD50 on 3 rd instar caterpillars, 0.001% by exposure and 0.033% by topical application. Essential oils of C. citratus and C. winterianus required longer periods to act and caused significant mortality on the three stages, registering LD50 0.008% and 0.159% for exposure, and 1.151% and 1.348% for topical application, respectively. Citronella oil caused behavioral changes in caterpillars, which reflected flight and aggressiveness. Therefore, these three essential oils can be an alternative for management of fall armyworm, with the potential to hinder and reduce its biotic potential.

No abstract

El labido doble es una anomalía rara que se caracteriza por una redundancia de la mucosa labial visible al abrir la boca o al sonreir. Afecta con mayor frecuencia al labio superior.Su tratamiento es quirúrgico, para lo cual están descritas diversas técnicas.En la paciente que presentamos se realizaron resecciones elípticas de la mucosa y del tejido submucoso combinadas con una z-plastia vertical en la parte central del labio superior. Los resultados estéticos y funcionales de nuestro caso fueron satisfactorios. AbstractDouble lip is a rare anomaly characterized by a redundancy of labial mucosa visible during mouth opening or during smiling. It occurs more frequently in the upper lip.The treatment is surgical and there are many techniques for its correction.In our clinical case we used an elliptical excision of mucosal and submucosal tissue combined with a vertical midline z-plasty of the upper lip. Satisfactory aesthetic result was achived.

C Ci ir ru ug gí ía a P Pl lá ás st ti ic ca a I Ib be er ro o-L La at ti in no oa am me er ri ic ca an na a-V Vo ol l.. 3 33 3-N Nº º 2 2 d de e 2 20 00 07 7