Bilal Hazrat, Sahar Sumrin, Din Sadrud
Medical Entomology and Disease Vector Control, Health Services Academy, Islamabad, Pakistan.
University of Copenhagen, Copenhagen, Denmark.
J Arthropod Borne Dis. 2017 May 27;11(2):278-285. eCollection 2017 Jun.
Application of plant extracts as mosquito control strategy was practiced from centuries. These are easily available, non-toxic, biodegradable and exhibit broad-spectrum target specific activities against larval stages of mosquitoes.
Different potential parts of locally grown plants, seeds of nutmeg (), peel of musambi (), leaves of babuna () mint () and ginger rhizome () selected and evaluated for their larvicidal properties against () . Oils were extracted through steam distillation process and extracts were evaluated as per WHO 2005 guidelines for testing of insecticides against larvae of mosquitoes.
Among the five plant extracts, had the lowest LC (400.81ppm) while had the highest LC value (710.30ppm) respectively after 24h of exposure. In terms of % age mortality, a series of concentrations (300-800ppm) gave high % mortality in case of while gave low % age mortality.
All the five plant species have larvicidal effects to certain extant and had great potential. Further small-scale field trials with the extracts of the most promising one () shall be conducted to determine operational feasibility.
几个世纪以来，人们一直在应用植物提取物作为控制蚊子的策略。这些提取物易于获取、无毒、可生物降解，并且对蚊子幼虫阶段具有广谱的靶向特异性活性。
选取当地种植植物的不同潜在部位，肉豆蔻种子（）、香橼果皮（）、薄荷（）和生姜根茎（）的叶子，并评估它们对致倦库蚊（）的杀幼虫特性。通过水蒸气蒸馏法提取油类，并按照世界卫生组织2005年杀虫剂对蚊子幼虫测试指南对提取物进行评估。
在五种植物提取物中，暴露24小时后，肉豆蔻种子提取物的LC50最低（400.81ppm），而香橼果皮提取物的LC50值最高（710.30ppm）。就死亡率百分比而言，一系列浓度（300 - 800ppm）下，肉豆蔻种子提取物的死亡率百分比很高，而香橼果皮提取物的死亡率百分比很低。
所有这五种植物都有一定程度的杀幼虫作用，肉豆蔻种子提取物潜力巨大。应进一步对最有前景的提取物（肉豆蔻种子提取物）进行小规模田间试验，以确定其操作可行性。
