The potato tuberworm, Phthorimaea operculella (Zeller), is a major pest that courses economic losses of potato Solanum tuberosum L. in both the field and the stores. In this research, the fumigant toxicity of essential oils of three Lamiaceous plants including Thymus caucasicus L., Rosmarinus officinalis L. and Satureja hortensis L. and methyl iodide (a chemical fumigant) were evaluated on P. operculella and on its demographic parameters under the laboratory conditions. Essential oils were extracted through hydro-distillation method using a Clevenger-type apparatus. The gas chromatography-mass spectroscopy (GC-MS) analysis indicated that thymol (29.76 %) in T. caucasicus, carvacrol (36.67 %) in S. hortensis and 1, 8-cineole (26.94 %) in R. officinalis essential oils were the major secondary constituents. The 50 % Lethal Concentration (LC₅₀) values for T. caucasicus, R. officinalis, and S. hortensis essential oils as well as methyl iodide towards P. operculella eggs were 5.99, 4.58, 3.55 and 0.29 µL L^− 1 air, respectively. On the other hand, methyl iodide showed the highest acute toxicity on the egg stage of P. operculella compared to the essential oils. The 30 % Lethal Concentration (LC₃₀) values of T. caucasicus, R. officinalis, and S. hortensis essential oils and methyl iodide (4.12, 3.53, 1.96, and 0.23 µL L^− 1 air, respectively) were affected the life history and demographical parameters of P. operculella. The longest development time was observed on methyl iodide and the shortest was on T. caucasicus and S. hortensis essential oils. The intrinsic rate of natural increase (r_m) values obtained in the control group and treated insects were: 0.19, 0.16, 0.14, 0.13, and 0.01 female progenies per female per day for T. caucasicus, S. hortensis, R. officinalis essential oils and methyl iodide, respectively. These results suggested that methyl iodide was significantly more toxic to the P. operculella compared to the essential oils of all the three mentioned plants. Meanwhile, it was concluded that the application of these plant essential oils can be useful as an alternative method for potato tuberworm control in storage facilities.

马铃薯块茎虫（Phthorimaea operculella，Zeller）是一种主要害虫，可在田间和商店内破坏马铃薯Solanum tuberosum L.的经济损失。在这项研究中，三种唇形科植物，包括精油的熏蒸剂毒性胸腺caucasicus L.，迷迭香L.和香薄荷属菠菜L.和甲基碘（化学熏蒸剂）分别进行评价P.蛾和上下其人口统计参数实验室条件。使用Clevenger型装置通过水蒸馏法提取精油。气相色谱-质谱（GC-MS）分析表明，百里香酚（29.76％）T. caucasicus，在香芹酚（36.67％）S.菠菜中和1，1,8-桉树脑（26.94％）R.巴戟精油是主要的次要成分。的50％致死浓度（LC ₅₀）为值T. caucasicus，R.巴戟，和S.菠菜精油以及甲基碘朝向P.蛾卵是5.99，4.58，3.55和0.29μL大号^{1 -}分别空气， 。另一方面，与精油相比，甲基碘在小菜蛾的卵期显示出最高的急性毒性。的30％致死浓度（LC ₃₀）值T. caucasicus，R.巴戟，和S.菠菜精油和甲基碘（4.12，3.53，1.96，和0.23μL大号^{- 1个}空气，分别地）受到影响的生活史和人口统计参数P.蛾。在甲基碘上观察到最长的发育时间，而在高加索螺旋藻和山楂链球菌精油上观察到的时间最短。高加索球菌，山楂，山茱R和obtained虫的自然繁殖率（r _m）在对照组和经处理的昆虫中的内在率分别为：每只雌性每天0.19、0.16、0.14、0.13和0.01个雌性子代。分别是精油和甲基碘。这些结果表明，与所有提到的三种植物的精油相比，碘甲烷对小菜蛾的毒性要大得多。同时，得出的结论是，这些植物精油的应用可作为存储设施中马铃薯结核病防治的替代方法。