斜纹夜蛾,通常被称为埃及或非洲棉叶虫,是一个重大的农业威胁。它在非洲广泛分布,地中海欧洲,和中东国家。这种多食害虫感染了44个家庭的许多农作物,包括棉花,大豆,苜蓿,红薯,胡椒,茄子,番茄,玉米,生菜,草莓,小麦,还有芙蓉.对不同植物器官造成的损害,如幼叶,射击,茎,bolls,芽,和水果,通常会决定大量的产品损失。目前的控制策略主要依靠合成杀虫剂,which,尽管它们的功效,有明显的缺点,包括杀虫剂抗性,环境污染,消费者关注,以及对非靶标生物和有益昆虫的不利影响。为了应对这些挑战,在这项研究中,我们开发并评估了一种高EO浓度(15%)和低表面活性剂含量的大蒜EO基纳米乳液,以减轻对植物的负面影响并增强对S.littoralis幼虫的功效。实验室生物测定显示出有希望的杀幼虫活性和减少的幼虫摄食,尽管观察到一些植物毒性症状。这项研究强调了植物杀虫剂作为合成化学品的可持续替代品的潜力。强调在虫害管理策略中平衡功效与环境和生态考虑的重要性。
Spodoptera littoralis, commonly known as the Egyptian or African cotton leafworm, is a significant agricultural threat. It is widely distributed in Africa, Mediterranean Europe, and Middle Eastern countries. This polyphagous pest infests numerous crop plants across 44 families, including cotton, soybeans, alfalfa, sweet potato, pepper, eggplant, tomato, maize, lettuce, strawberry, wheat, and hibiscus. The damage caused by S. littoralis on different plant organs, such as young leaves, shoots, stalks, bolls, buds, and fruits, often determines substantial product losses. Current control strategies predominantly rely on synthetic insecticides, which, despite their efficacy, have notable drawbacks, including insecticide resistance, environmental contamination, consumer concerns, and adverse effects on non-target organisms and beneficial insects. In response to these challenges, in this study, we developed and evaluated a garlic EO-based nanoemulsion with a high EO concentration (15%) and low surfactant content to mitigate the possible negative impact on plants and to enhance efficacy against S. littoralis larvae. Laboratory bioassays demonstrated promising larvicidal activity and reduced larval feeding, although some phytotoxicity symptoms were observed. This study underscores the potential of botanical insecticides as sustainable alternatives to synthetic chemicals, emphasizing the importance of balancing efficacy with environmental and ecological considerations in pest management strategies.