The aim of this study was to determine the potency (ITU) and efficacy of a liquid formulation of Bacillus thuringiensis israelensis developed by the State University of Londrina named BioUel, against early fourth instar larvae of Aedes aegypti and Culex quinquefasciatus. The ITU/mg of BioUel was 960, the LC₅₀ was of 0.271 (± 0.39) ppm, and the LC₉₅ was 0.634 (± 0.099) ppm, in larvae of C. quinq...

Litsea salicifolia is one of the many plants used as phytopesticide, traditionally by various tribes of Assam. Of the five extracts of L. salicifolia tested for the bioactivity against Aedes aegypti and Culex quinquefasciatus, the aqueous extract was more effective compared to other extracts exhibiting bioactivity at 72 ppm against A. aegypti. The hexane extract (2000 ppm) exhibited 70% repelle...

The present study was undertaken in order to study whether Culex quinquefasciatus collected in Phitsanulok Province can be an insect host for the development of Wuchereria bancrofti larvae. W. bancrofti infected blood from Myanmar workers in Mae Sot, Tak Province was fed to mosquitoes by using the artificial membrane feeding. An infection of W. bancrofti was found with the highest density of L3...

The adult females of Culex quinquefasciatus are vectors responsible for transmission of different arboviruses and lymphatic filariasis. The mosquito has anthropophilic and endophilics habits, their larvae develop in almost all habitats modified by humans. Different insecticides groups such as organophosphates, carbamates, and pyrethroids have been widely used in mosquito control, but in some pl...

Introduction: The larvicidal activity of oils, fatty acids, and methyl esters of Solanum lycocarpum fruit against Culex quinquefasciatus is unknown. Methods: The larvicidal activity of samples of ripe and unripe fruit from S. lycocarpum was evaluated against third and fourth instar larvae of C. quinquefasciatus. Results: The oils, fatty acids, and methyl esters of S. lycocarpum showed the great...

The bioefficacy of mosquito coils containing several pyrethroids were tested in a 25 m3 room against Culex pipiens quinquefasciatus, Aedes aegypti and Anopheles dirus. The test results were compared with tests against Culex pipiens pallens in Japan. Based on the KT50 values (the 50% knockdown time) of mosquito coils containing dl, d-T80-allethrin, d, d-T-prallethrin and methoxymethyl-tetrafluor...

Studies on the vector-host interactions of Culex pipiens complex mosquitoes by sequencing portions of mitochondrial cytochrome b gene indicate that Cx. p. pipiens f. pipiens predominantly feed on avian hosts (93.1%), and focus feeding activity on several key bird species, in particular the American robin, the gray catbird, and the house sparrow in Connecticut. However, Cx. p. quinquefasciatus i...

The random amplified polymorphic DNA (RAPD) assay was used to assess the level of DNA damage in various exposed and unexposed Culex quinquefasciatus larvae to acetone and chloroform extracts of Curcuma longa and Melia azedarach at different concentrations (6.25, 12.5 and 25 ppm). This is the first report of an analysis of genomic alterations in plant extracts-treated mosquito larvae using RAPD-...

INTRODUCTION Mass production of mosquitoes under laboratory conditions allows implementing methods to control vector mosquitoes. Colony development depends on mosquito size and weight. Body size can be estimated from its correlation with wing size, whereas weight is more difficult to determine. Our goal was to test whether wing size can predict the weight. METHODS We compared dry weight and w...

5-Hexadecenoic acid can be used to produce a semichemical method to control the disease-carrying mosquito Culex quinquefasciatus. This unusual fatty acid is produced in the seed of Kochia scoparia. We have isolated two acyl-acyl carrier protein desaturases from this species and expressed them in Escherichia coli to facilitate functional characterisation.