Over the decades, synthetic pesticides have negatively impacted agricultural activity, for example, contamination of aquifers and surface sources, a proliferation of new resistant pests, degenerative diseases caused to applicators, etc. Over time this has led to new products such as essential oils and plant extracts being studied for potential use as ecological biocides for pest control. This study proposes a new biocide using molle (Schinus Molle) leaves that were processed using the vapor entrainment method from which its essential oil was obtained and then analyzed by gas chromatography-mass spectrometry (GCMS) and finally, its capacity as an insecticide against the potato aphid (Macrosiphum euphorbiae) in the adult stage was evaluated using two application techniques (fumigation and direct contact). The oil was composed of 1-Tetradecene (43.33%), 1-Dodecanol (22.84%), D-limonene (4.53%) and α-phellandrene (4.24%) being responsible for the biocidal activity. In addition, the fumigation technique had an LD50 of 320.51 µL/L of air while direct contact had an LD50 of 5.14 mL/L

Schinus molle, Macrosiphum euphorbiae, Essential oil, Pest control, Biocides.