Chemical profile and biological activity of essential oils from psidium guajava grown in timor island-eastern indonesia

Abstract

Psidium guajava was abundantly found in arid land of Timor and traditionally used for treatment against diarhea. Research had been performed to analyze the chemical profiles together with antibacterial and fruit flies attractant activity of the leaf essential oil from P. guajava. The powder of dried leaves was subjected to hydro-distillation using Clevenger apparatus to obtain essential oil with a yield of 0.5%. Analysis of GC-MS spectra revealed that limone and β-caryophyllene were the main components of the essential oil. The essential oil showed strong antibacterial activity with the zone inhibition was observed at 16.3 for Staphyloccus aureus and 15.9 mm for Escherechia coli. On the other hand, no fruit flies were trapped during the field test in guava fruit.