Monoterpenes, phenylpropenes and sesquiterpenes are the major constituents of essential oils of many aromatic plants and possess a wide spectrum of biological activities. In this study, the effect of eleven monoterpenes, phenylpropenes and sesquiterpenes on larval and pupal duration, pupation, pupal weight, adult emergence, fecundity and fertility of Spodoptera littoralis were evaluated. Results showed that larvae fed on the treated diet at 500, 1000 and 2000 mg/kg developed slower than those fed on untreated diet. trans- Cinnamaldehyde (500 mg/kg) was the most effective compound in increasing larval duration of 20.4 days compared to 13.5 days in control, followed by1,8-cineole and ( −)-citronellal. Also, treatment with ( −)-carvone, ( −)-citronellal, eugenol, p-cymene and α-pinene prolonged pupal duration by 1 to 3 days compared to control. On the other hand, the tested compounds significantly reduced pupation percentage and pupal weight of S. littoralis. trans-Cinnamaldehyde was more effective than a reference insect growth regulator, pyriproxyfen, in pupation percent reduction at 500 mg/kg. Furthermore, the tested compounds strongly decreased adult emergence of S. littoralis with 1,8-cineole being the most effective compound as it lowered adult emergence to 23.3, 16.7, and 13.3% at 500, 1000, and 2000 mg/kg, respectively, compared to 90.0% in control. In addition, oviposition and eclosion were significantly reduced by the tested compounds. trans-Cinnamaldehyde, ( −)-citronellal, 1,8-cineole, ( −)-carvone and (Z,E)-nerolidol were the most effective compounds on oviposition and egg hatching reduction.

单萜，苯丙烯和倍半萜是许多芳香植物精油的主要成分，并具有广泛的生物活性。在这项研究中，评估了11种单萜，苯基丙烯和倍半萜对幼虫和p的持续时间，化up，p重，成年出苗，繁殖力和斜纹夜蛾生育力的影响。结果表明，以500、1000和2000 mg / kg的饮食喂养的幼虫比未饮食的幼虫发育缓慢。反式-肉桂醛（500 mg / kg）是增加幼虫持续时间20.4天最有效的化合物，而对照组为13.5天，其次是1,8-桉树脑和（-）-香茅醛。另外，用（-）-香芹酮，（-）-香茅醛，丁子香酚，p苏木精和α-pine烯与对照组相比，p期延长了1至3天。另一方面，所测试的化合物显着降低了滨海链球菌的化ation百分数和and重量。反式肉桂醛在500 mg / kg的化up百分率方面比参考昆虫生长调节剂吡吡氧芬更有效。此外，所测试的化合物可显着降低滨海链球菌的成虫率，其中1,8-桉树脑是最有效的化合物，因为它分别以500、1000和2000 mg / kg的浓度将成虫率分别降低至23.3、16.7和13.3％，相比之下，对照组为90.0％。另外，受试化合物显着降低了产卵和闭塞。反式-肉桂醛，（-）-香茅醛，1,8-桉树脑，（-）-香芹酮和（Z，E）-橙花醇是减少产卵和减少卵孵化的最有效化合物。