Abstract The study reported the development of biodegradable, environment- and eco-friendly material based on natural polymers and lemongrass (Cymbopogon citratus L.) essential oil (LEO) for application as a green pesticide. The insecticidal effect of an emulsion composed of encapsulated LEO into a biopolymer matrix against the potato tuber moth (Phthorimaea operculella, Lepidoptera: Gelechiidae) (PTM) was examined and its prolonged effect compared with pure LEO. The lethal effect of the encapsulated LEO against the PTM was prolonged for up to seven days as compared to 48 h for the pure LEO. The slow release rate of the active compound (citral) from the encapsulated and the pure LEO was determined by UV–Vis spectrophotometry. After seven days the citral concentration in the encapsulated LEO was higher (60%) than in the pure LEO after 48 h (52.7%). The results of the slow release of the active compound correlated well with the insecticidal effect of the encapsulated and the pure LEO against the PTM.

中文翻译：

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胶囊化柠檬草（Cymbopogon citratus L.）精油对马铃薯块茎蛾 Phthorimaea operculella 的影响

摘要 该研究报告了基于天然聚合物和柠檬草 (Cymbopogon citratus L.) 精油 (LEO) 的可生物降解、环境和生态友好材料的开发，用作绿色杀虫剂。研究了由包封到生物聚合物基质中的 LEO 组成的乳液对马铃薯块茎蛾（Phthorimaea operculella，鳞翅目：Gelechiidae）（PTM）的杀虫效果，并与纯 LEO 相比其延长效果。与纯 LEO 的 48 小时相比，封装的 LEO 对 PTM 的致死作用延长了长达 7 天。活性化合物（柠檬醛）从包封的和纯 LEO 中的缓慢释放速率通过紫外-可见分光光度法测定。7 天后，封装 LEO 中的柠檬醛浓度 (60%) 高于 48 小时后纯 LEO 中的柠檬醛浓度 (52.7%)。