Termites are one of the most challenging pests that agriculture and urban environments are faced with. They bring substantial losses in annual and perennial crops and damage wood components at construction sites. The development of natural products with biological activity for termite control is an ecological alternative in the search to replace conventional products. Hence, the aim of this research was to predict the termiticidal and repellent effects of the essential oil from Ocotea quixos leaves on Nasutitermes corniger using a one-factor response surface methodology design. The variable analysed was the concentration of essential oil in ethanol at an interval of 0.3–0.05% for anti-termite activity and between 0.12 and 0.01% for repellent action. A 100% mortality rate was found at concentrations higher than 0.12% and at the minimum concentration analysed, the effect was 22.2%. As for the repellent action, the concentration of 0.12% was able to repel 100% of the termites and at 0.01% it repelled 48.9%. The analysis of the essential oil from Ocotea quixos leaves by GC-MS resulted in the presence of 42 compounds, 39 of them elucidated. The main compounds were (E)-cinnamyl acetate (36.44%), (E)-cinnamaldehyde (27.03%), (E)-β-caryophyllene (5.21%) and (E)-methyl isoeugenol (4.18%).

中文翻译：

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Ocotea quixos 叶中提取的精油对 Nasutitermes corniger（等翅目：白蚁科）的杀白蚁和驱避活性的初步预测模型使用单因素响应面方法设计

白蚁是农业和城市环境面临的最具挑战性的害虫之一。它们给一年生和多年生作物带来重大损失，并损坏建筑工地的木材部件。开发用于白蚁防治的具有生物活性的天然产品是寻求替代常规产品的生态替代方案。因此，本研究的目的是预测Ocotea quixos叶精油对Nasutitermes Corniger的杀白蚁和驱虫效果使用单因素响应面方法设计。分析的变量是乙醇中精油的浓度，其抗白蚁活性为 0.3-0.05%，驱虫剂为 0.12-0.01%。在高于 0.12% 的浓度下发现 100% 死亡率，在分析的最低浓度下，效果为 22.2%。至于驱虫作用，0.12%的浓度能够驱除100%的白蚁，0.01%的浓度驱除48.9%。通过 GC-MS分析Ocotea quixos叶中的精油发现存在 42 种化合物，其中 39 种得到阐明。主要化合物为( E )-醋酸肉桂酯(36.44%)、( E )-肉桂醛(27.03%)、( E )-β-石竹烯(5.21%)和(E )-甲基异丁香酚 (4.18%)。