Larvicidal and adulticidal effects of some Egyptian oils against Culex pipiens

Abstract

Mosquitoes and mosquito-borne diseases represent an increasing global challenge. Plant extract and/or oils could serve as alternatives to synthetic insecticides. The larvicidal effects of 32 oils (1000 ppm) were screened against the early 4th larvae of Culex pipiens and the best oils were evaluated against adults and analyzed by gas chromatography-mass spectrometry (GC mass) and HPLC. All oils had larvicidal activity (60.0–100%, 48 h Post-treatment, and their Lethal time 50 (LT50) values ranged from 9.67 (Thymus vulgaris) to 37.64 h (Sesamum indicum). Oils were classified as a highly effective group (95–100% mortalities), including Allium sativum, Anethum graveolens, Camellia sinensis, Foeniculum vulgare, Nigella sativa, Salvia officinalis, T. vulgaris, and Viola odorata. The moderately effective group (81–92% mortalities) included Boswellia serrata, Cuminum cyminum, Curcuma aromatic, Allium sativum, Melaleuca alternifolia, Piper nigrum, and Simmondsia chinensis. The least effective ones were C. sativus and S. indicum. Viola odorata, Anethum graveolens, T. vulgaris, and N. sativa provide 100% adult mortalities PT with 10, 25, 20, and 25%. The mortality percentages of the adults subjected to 10% of oils (H group) were 48.89%, 88.39%, 63.94%, 51.54%, 92.96%, 44.44%, 72.22%, and 100% for A. sativum, An. graveolens, C. sinensis, F. vulgare, N. sativa, S. officinalis, T. vulgaris, and V. odorata, respectively. Camellia sinensis and F. vulgare were the most potent larvicides whereas V. odorata, T. vulgaris, An. graveolens and N. sativa were the best adulticides and they could be used for integrated mosquito control.

Nanostructured Lipid Carriers (NLC) for Biologically Active Green Tea and Fennel Natural Oils Delivery: Larvicidal and Adulticidal Activities against Culex pipiens

“…In a previous recent study, Baz et al [ 74 ] revealed that major compounds of F. vulgare oil (GC/MS) were Estragole (70.36%); Limonene (8.96%), where the major components of C. sinensis oil were Gallic acid (1674 µg/mL), Catechin (421 µg/mL), Coffeic acid (678 µg/mL), Coumaric acid (566 µg/mL), and Naringenin (178 µg/mL). It had been noted that proanthocyanidins were the most abundant bioactive chemical in C. Sinensis leaf extract.…”

Novel Pesticidal Efficacy of Araucaria heterophylla and Commiphora molmol Extracts against Camel and Cattle Blood-Sucking Ectoparasites

“…Botanicals have been well-known for their medicinal properties [24] since ancient times [25] and induce anthelmintic, antiprotozoal, antiviral, antifungal, and antibacterial [26][27][28][29][30][31][32] and pesticidal effects [14,15] such as ovicidal [33,34], larvicidal and insect growth regulating effects [19,[35][36][37][38][39][40][41][42][43][44][45][46][47][48] as well as adulticidal and repellent properties [8,33,34,39,45,46,[49][50][51][52][53]. Botanicals are characterized by high efficiency against pests and prevention of their associated diseases, safety to non-target organisms [5,10,44], and biodegradation [5,11].…”

Methods and applications imparting plant essential oils as mosquito repellency agents on textiles

“…Cage test [28] Origanum vulgare and Thymus vulgaris Aedes aegypti Paper Impregnation [29] Cymbopogon nardus, Syzygium aromaticum, and Citrus sinesis Aedes aegypti and Culex quinquefasciatus Mosquito repellency [30] Zingiber cassumunar Aedes albopictus Cage test [31] Allium sativum, Anethum graveolens, Camellia sinensis, Foeniculum vulgare, Nigella sativa, Salvia ofcinalis, Thymus vulgaris, and Viola odorata Culex pipiens CDC bottle test [32] Fabrics coated with essential oils as repellency agents Methods of imparting essential oils According to the literature review, the common method to control the mosquito is textile repellency. To impart mosquito repellent characteristics into textiles, spraying, dipping, and pad dry curing procedures are also used.…”