This study aimed to evaluate the toxicity of the Varronia curassavica Jacq. essential oil to two cosmopolitan and polyphagous pest species, the two-spotted spider mite (Tetranychus urticae Koch) and the green aphid (Myzus persicae Sulzer). Additionally, we tested the essential oil toxicity to a generalist predatory insect, the green lacewing Ceraeochrysa cubana Hagen. The treatments consisted of four essential oil concentrations (0.25, 0.5, 0.75 and 1.0%) and one control (Tween® 80 + water). At 0.75% concentration, the V. curassavica essential oil caused the highest mortalities for both pests. The concentration of 1.0% of the essential oil interfered mainly in the rates of oviposition and egg hatching and caused a decrease in the instantaneous population growth rate (r_i) of T. urticae. Survival of the C. cubana was not affected by the highest tested concentration of the essential oil (1%). Tested concentrations V. curassavica essential oil were toxic to T. urticae and M. persicae, but not to the predator C. cubana.

本研究旨在评估Varronia curassavica Jacq的毒性。精油对两种世界性多食性害虫物种，即二斑叶螨（Tetranychus urticae Koch）和绿蚜虫（Myzus persicae Sulzer）。此外，我们测试了精油对一种多面手捕食性昆虫绿色草蛉Ceraeochrysa cubana Hagen 的毒性。处理包括四种精油浓度（0.25、0.5、0.75 和 1.0%）和一种对照（Tween® 80 + 水）。在 0.75% 浓度下，V. curassavica精油对这两种害虫造成的死亡率最高。浓度为 1.0% 的精油主要干扰产卵率和卵孵化率，并导致荨麻的瞬时种群增长率 ( r _i )下降。C. cubana 的存活不受最高测试浓度的精油 (1%) 的影响。测试浓度V. curassavica精油对T. urticae和M. persicae有毒，但对捕食者C. cubana没有毒性。