Dermanyssus gallinae(De Geer) (Acari: Dermanyssidae) is the main ectoparasite associated with laying poultry. This mite is commonly controlled by the application of synthetic chemical insecticides, wich lead to the selection of resistant populations and formation of residues in eggs. Thus, new molecules must be developed to control D. gallinae. This work evaluated the toxicity of essential oils (EOs) from Cinnamomum cassia, Cinnamomum camphora, Cinnamomum camphora var. linalooliferum, Citrus aurantium, Citrus aurantium var. bergamia, Citrus aurantifolia and Citrus reticulata var. tangerine against D. gallinae. Additionally, the chemical profiles of the most bioactive EOs were analyzed by gas chromatography coupled with mass spectrometry (GC–MS) and the major compounds were subjected to new tests using D. gallinae. The most toxic EOs against D. gallinae were evaluated for the nontarget entomopathogenic fungus Beauveria bassiana (Unioeste 88). The EOs from C. cassia (LC₅₀ = 25.43 ± 1.0423 μg/cm³) and C. camphora var. linalooliferum (LC₅₀ = 39.84 ± 1.9635 μg/cm³) were the most active in the fumigant bioassay and caused mortality rates of 96 and 61%, respectively. The GC–MS analysis revealed that the major constituents of EOs from C. cassia and C. camphora var. linalooliferum were trans-cinnamaldehyde and linalool, respectively. The pure compounds, trans-cinnamaldehyde (LC₅₀ = 68.89 ± 3.1391 μg/cm³) and linalool (LC₅₀ = 51.45 ± 1.1967 μg/cm³), were tested on D. gallinae and showed lower toxicity than the EOs. Thus, the compounds were not the only active substances produced by C. cassia and C. camphora var. linalooliferum; moreover synergism may have occurred between the substances. The EOs from C. cassia and C. camphora var. linalooliferum were also toxic to B. bassiana (Unioeste 88). Thus, EOs from C. cassia and C. camphora var. linalooliferum are promising candidates for use in D. gallinae control, but cannot be used in conjunction with the fungus B. bassiana.

鸡皮螨（De Geer）（Acari：Dermanyssidae）是与产蛋家禽有关的主要体外寄生虫。这种螨通常通过使用合成化学杀虫剂来控制，从而导致选择抗性种群并在鸡蛋中形成残留物。因此，必须开发新的分子来控制鸡 D. gallinae。这项工作评估了来自Cinnamomum cassia、Cinnamomum camphora、Cinnamomum camphora var. 的精油 (EO) 的毒性。linalooliferum , Citrus aurantium , Citrus aurantium var. bergamia、Citrus aurantifolia和Citrus reticulata var。橘子对抗D. gallinae。此外，通过气相色谱与质谱联用 (GC-MS) 分析了最具生物活性的 EO 的化学特征，并使用D. gallinae对主要化合物进行了新测试。对D毒性最强的 EO 。鸡皮对于非靶昆虫病原真菌进行了评价白僵菌（Unioeste 88）。来自C. cassia (LC ₅₀ = 25.43 ± 1.0423 μg/cm ³ ) 和C. camphora var. 的EO 。芳樟(LC ₅₀ = 39.84 ± 1.9635 μg/cm ³) 在熏蒸生物测定中最活跃，死亡率分别为 96% 和 61%。GC-MS 分析表明，来自C. cassia和C. camphora var的 EO 的主要成分。芳樟醇分别是反式肉桂醛和芳樟醇。将纯的化合物，反式-肉桂醛（LC ₅₀ = 68.89±3.1391微克/厘米³）和里哪醇（LC ₅₀ = 51.45±1.1967微克/厘米³），进行上测试D.鸡皮并且显示比EOS更低的毒性。因此，这些化合物并不是C. cassia和C. camphora var产生的唯一活性物质。香樟; 此外，这些物质之间可能会发生协同作用。来自C. cassia和C. camphora var 的EO 。linalooliferum也对B. bassiana有毒（Unioeste 88）。因此，来自C. cassia和C. camphora var 的EO 。linalooliferum是用于控制鸡 D. gallinae 的有希望的候选者，但不能与真菌B. bassiana一起使用。