Several species of predatory mites, naturally occurring in coconut plantations, play an important role in regulating populations of phytophagous mites that are key pests of this crop. Plant essential oils (EOs) are bioactive mixtures of compounds that hold potential for controlling phytophagous arthropods with minimal impacts on non-target organisms and the environment. This study aimed to characterize the chemical composition and assess the bioactivity of the EO extracted from the leaves of the ‘Pera’ sweet orange grafted on ‘Rangpur lime’ to a key pest of coconut plantations worldwide, namely the coconut mite Aceria guerreronis (Acari: Eriophyidae), and its compatibility with the naturally-occurring generalist predatory mite Typhlodromus ornatus (Acari: Phytoseiidae). Briefly, sabinene was the major component, followed by δ-3-carene and (E)-β-ocimene. The EO was toxic to A. guerreronis (LC₅₀ = 4.28 mg/mL; LC₈₀ = 10.39 mg/mL) but not to T. ornatus. The LC₈₀ of the EO did not repel A. guerreronis and was toxic to the pest mite only in the first hours (<9 h). Moreover, this concentration did not affect the growth rate of the predator, which was positive over the 10 days of exposure to the oil. Therefore, the EO of ‘Pera’ sweet orange holds potential for the management of coconut mite and is compatible with the generalist predatory mite T. ornatus.

天然存在于椰子种植园中的几种捕食性螨类在调节作为该作物主要害虫的植食性螨类种群方面发挥着重要作用。植物精油 (EO) 是具有生物活性的化合物混合物，具有控制植食性节肢动物的潜力，对非目标生物和环境的影响最小。本研究旨在表征从嫁接在“Rangpur 石灰”上的“Pera”甜橙的叶子中提取的 EO 的化学成分并评估其生物活性，其中 EO 是全球椰子种植园的一种主要害虫，即椰子螨Aceria guerronis（Acari： Eriophyidae)，以及它与自然发生的多面目捕食螨Typhlodromus ornatus 的相容性（螨虫：植防科）。简而言之，槭烯是主要成分，其次是δ-3-蒎烯和( E )-β-罗勒烯。EO 对A. guerreronis (LC ₅₀  = 4.28 mg/mL; LC ₈₀  = 10.39 mg/mL)有毒，但对T. ornatus无毒。EO的 LC ₈₀不排斥A. guerreronis并且仅在最初几个小时（<9 小时）对害虫有毒。此外，这种浓度不会影响捕食者的生长速度，在接触油的 10 天里，它是积极的。因此，'Pera' 甜橙的 EO 具有防治椰子螨的潜力，并且与通用掠食性螨T. ornatus相容。