Background Mosquitoes are vectors of parasitic diseases such as malaria, lymphatic filariasis, yellow fever, and dengue fever among others. They are well known as public enemies for their noise nuisance, biting annoyance, sleeplessness, allergic reactions, and diseases transmission during the biting and feeding activities. This then necessitate the search for insecticides of plant origin which are bio-degradable, non-toxic, and readily available for man use. Result This study, evaluated the fumigant efficacy of the powder of P. alliacea to control the adult stage of Culex mosquito. Powder of Petiveria alliacea were administered at different dose of (1 g, 2 g, 3 g, 4 g, and 5 g), respectively. Result obtained shows the fumigant effect of the powder were effective with percentage mortality of 18.33–60.00% for the leaf powder and 23.30–71.60% for the root powder within 2 h post-treatment period ( P < 0.05). The synergistic effect of the leaf and root powder was also investigated. The lethal dosage (LD 50 ) of the leaf, root, and synergistic effect of leaf and root bark powder required to kill 50% of the adult Culex quinquefasciatus was 3.76 g, 2.86 g, and 2.63 g, respectively. However, 25.06 g, 15.25 g, and 12.94 g of the leaf, root, and leaf and root powder were required to kill 90% (LD 90 ) after a 2-h exposure period. Conclusion These finding suggested P. alliacea powder could be a good source of insecticide which may be used for the production of biopesticides. The present findings have important implications in the practical control of adult mosquito by using botanical insecticides. These plant powders are easy to prepare, inexpensive, and safe for use in mosquito control.

中文翻译：

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Petiveria Alliacea (Linneaus)叶和根皮粉防治丝虫病媒介库蚊库蚊的功效

背景蚊子是诸如疟疾、淋巴丝虫病、黄热病和登革热等寄生虫病的载体。它们因噪音滋扰、咬人烦恼、失眠、过敏反应和在咬和进食活动中传播疾病而被称为公敌。这就需要寻找可生物降解、无毒且易于人类使用的植物来源的杀虫剂。结果本研究评价了蒲公英散对库蚊成虫期的熏蒸效果。分别以不同的剂量（1 g、2 g、3 g、4 g和5 g）施用葱姜粉。获得的结果表明，该粉末的熏蒸效果是有效的，叶粉的死亡率为 18.33-60.00%，死亡率为 23.30-71。处理后 2 h 内根粉含量为 60%（ P < 0.05）。还研究了叶粉和根粉的协同作用。叶、根的致死剂量(LD 50 ) 以及叶和根皮粉的协同作用杀死50% 的成年库蚊所需的剂量分别为3.76 g、2.86 g 和2.63 g。然而，在暴露 2 小时后，需要 25.06 g、15.25 g 和 12.94 g 的叶、根以及叶和根粉才能杀死 90% (LD 90 )。结论 这些发现表明，大蒜粉可能是一种很好的杀虫剂来源，可用于生产生物农药。本研究结果对使用植物杀虫剂实际控制成年蚊子具有重要意义。这些植物粉末易于制备、价格低廉且安全，可用于控制蚊子。