Aedes aegypti is the primary vector of chikungunya, yellow and dengue fevers. Dengue fever is the major cause of child morbidity and hospitalisation in some Asian and African countries, while yellow fever is prevalent in Nigeria. The development of resistance to the available insecticides has necessitated the continued search for safer ones from plants. Eighteen plant extracts with ethnomedical...

tagetes minuta l. is considered as an annual plant growing in the temperate zones of south america. it has been used as carminative, anti-inflammatory, anti-abortion,vermifuge, bronchodilator and hypotensive. in the current study the locally cultured plant of tagetes minuta l. was studied for phytochemical and larvicidal properties.the phytochemical analysis of aerial parts of the plant exhibit...

BACKGROUND Aedes aegypti L. is the major vector of dengue fever and dengue hemorrhagic fever. In an effort to find effective tools for control programs to reduce mosquito populations, the authors assessed the acute toxicities of 14 monoterpenoids, trans-anithole and the essential oil of rosemary against different larval stages of Ae. aegypti. The potential for piperonyl butoxide (PBO) to act as...

BACKGROUND Botanical and microbial insecticides have been increasingly used for the control of mosquito given their efficacy and documented nontoxic effects on non-target organisms. The discovery of new insecticides is imperative because of the development of resistance by the mosquitoes to the readily available insecticides. The aim of this study was therefore to isolate and characterize compo...

The use of insecticides can cause adverse effects in vector control, a plant bio-insecticide is an advantageous substitute. Currently, the promising mosquito larvicidal activity from plant extracts has been reported worldwide, including Thailand. In this study, the endocarp of Pereskia bleo (Kunth) DC. fruit was extracted with distilled water and ethanol. Crudes and fractionated groups of the e...

Widespread concern for the occurrence of resistant strains, along with the avoidance of the use of highly toxic insecticides and their wide environmental dispersal, highlights the need for the development of new and safer pest control agents. Natural products provide inspiration for new chemical entities with biological activities, and their analogues are good lead compounds for the development...

Purpose: To evaluate the larvicidal activity of the essential oil of Salvia plebeian R.Br. (Labiatae) aerial parts against the larvae of Aedes aegypti L. Methods: The essential oil of S. plebeian aerial parts was obtained by hydro-distillation and analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). The essential oil was evaluated for larvicidal activity using W...

We conducted surveys to identify the species of spore-forming bacteria present in natural and artificial containers. Most of our samples came from Illinois. Identification was based on the cellular fatty acid composition of the bacterial cell wall. In addition, we utilized a custom database for commercially produced strains of Bacillus thuringiensis var. israelensis (Bti) and B. sphaericus, to ...

The study was conducted to investigate the chemical compositions and larvicidal effect of n-hexane extract Parinari excelsa seeds against fourth instar larvae Culex mosquito after 24 h 48 exposure. composition P. were analyzed using Gas Chromatography-Mass Spectrometry (GC-MS). Larvicidal activity performed following standard procedures World Health Organization (WHO). GC-MS analysis showed tha...

Essential oil was extracted from the leaves of Hyptis suaveolens by hydro-distillation placing 1kg washed fresh in round bottom flasks set up with 1liter distilled water. The Mosquitocidal activity, mosquito larvae (larvicidal) and repellency effect were carried-out using standard modified methods. Percentage yield essential oils gotten as 0.05%. showed very strong larvicidal properties against...