Abstract

Essential oils (EOs) from three species of the Lamiaceae family growing in several areas in Morocco, were evaluated for their acaricidal properties against the oriental red mite, Eutetranychus orientalis (Klein) (Acari: Tetranychidae). In this study, different concentrations of thyme oils including Thymus satureioides Coss., T. maroccanus Ball. and T. atlanticus Ball. EOs were used to assess the adulticidal, larvicidal effect by leaf paint method. In addition, the ovicidal effect was evaluated by the leaf disc sprayer method. The obtained results showed that all the EOs tested induce significant mortality to E. orientalis adult females and larvae, and the mortality was increased with increasing the concentration of EOs. In addition, adult females treated with EOs lay fewer eggs than untreated females. Moreover, the highest ovicidal effect on E. orientalis, was induced by T. maroccanus and the lowest effect was induced by T. satureioides and T. atlanticus, respectively at the lowest concentration. The GC/MS analysis showed that the major compounds of T. satureioides EO were borneol (22.7 %), thymol (18.2 %), p-cymene (17.3 %), and α-pinene (6.7 %). The main compounds of T. atlanticus and T. maroccanus EOs are carvacrol (47.1-65.5 %), p-cymene (7.5-20.7 %) and α-pinene (3.7-5.5 %). The results proved that all EOs tested could be used in the integrated pest management of E. orientalis.

摘要

对来自摩洛哥多个地区的3种唇形科的精油（EOs）进行了评估，以评估其对东方红螨Eueunynys Orientalis（Klein）（Acari：Tetranychidae）的杀螨特性。在这项研究中，不同浓度的百里香油包括胸腺satureioides科斯，T. maroccanus球。和T. atlanticus Ball。EOs用于通过叶漆法评估杀螨效果。另外，通过叶盘喷雾器方法评价杀卵作用。获得的结果表明，所有测试的EOs均导致东方埃希氏菌的大量死亡成年雌性和幼虫，死亡率随着EOs浓度的增加而增加。此外，接受EO处理的成年雌性产卵的数量要少于未经治疗的雌性。此外，在最高的杀卵效果E.侧柏，诱导T. maroccanus和最低的作用是通过诱导T. satureioides和T.阿特兰提库斯，分别在最低浓度。GC / MS分析表明，鼠尾草EO的主要化合物为冰片（22.7％），百里香酚（18.2％），对伞花烯（17.3％）和α-pine烯（6.7％）。T.atlanticus和T.maroccanus的主要化合物EOs为香芹酚（47.1-65.5％），对伞花烃（7.5-20.7％）和α-pine烯（3.7-5.5％）。结果证明所有测试的EOs均可用于东方大肠杆菌的病虫害综合治理。