Thaumastocoris peregrinus Carpintero and Dellapé, 2006 (Hemiptera: Thaumastocoridae) is an exotic insect that causes losses in the production of Eucalyptus sp. The egg parasitoid Cleruchoides noackae Lin and Huber, 2007 (Hymenoptera: Mymaridae) is the principal biological control agent of T. peregrinus. Essential oil, including Eugenia uniflora (L.) have a potential for managing this pest. The objective of this study was to evaluate the toxicity of E. uniflora to T. peregrinus and the selectivity of this oil on the parasitoid C. noackae and its parasitism on T. peregrinus. Toxicity of E. uniflora essential oil was tested at different concentrations to eggs, nymphs and adults of T. peregrinus. The selectivity of this oil was also evaluated in the pre- and post-parasitism of C. noackae on T. peregrinus eggs. The essential oil was analyzed by gas chromatography. Eugenia uniflora essential oil at 0.75% concentration showed insecticidal potential on T. peregrinus adults, nymphs and eggs, and was safer to C. noackae when applied one day after parasitism than pre-parasitism and 7-day post-parasitism. The major compounds found in the E. uniflora essential oil were calamen-10-one (20.20%), silfiperferol-6-em-5-one (10.06%), and germacrone (6.61%). Under laboratory conditions E. uniflora essential oil showed an insecticidal effect to different life stages of T. peregrinus, but it is selective for egg parasitoid C. noackae just one day after the parasitism occurs. Further studies should be carried out on eucalyptus plantations.

Thaumastocoris peregrinus Carpintero和Dellapé，2006年（半翅目：Thaumastocoridae）是一种外来昆虫，在桉树的生产中造成损失。寄生蜂卵Cleruchoides noackae林和胡贝尔，2007（膜翅目：Mymaridae）是主要的生物控制剂T.游隼。包括Eugenia uniflora（L.）在内的香精油具有控制这种害虫的潜力。本研究的目的是评估的毒性E.叶草到T.游隼和这种油的对寄生的选择性C. noackae及其对寄生T.游隼。大肠杆菌的毒性对百日草的卵，若虫和成虫进行了不同浓度的精油测试。这种油的选择性也进行了评价中的前，后寄生C. noackae上T.游隼蛋。通过气相色谱法分析精油。尤金尼亚叶草在0.75％浓度的精油表明杀虫电位上T.游隼成年人，若虫和鸡蛋，并且是更安全的C. noackae当寄生比预寄生和7天后寄生之后施加一天。在大肠埃希菌中发现的主要化合物香精油为a门十酮（20.20％），西非perferol-6-em-5-one（10.06％）和胚芽酮（6.61％）。在实验室条件下E.叶草精油显示出不同的生命阶段的杀虫效果T.游隼，但它是有选择性的卵寄生C. noackae短短一天的寄生发生后。应该对桉树人工林进行进一步的研究。