Use of Bacillus sphaericus Neide (Bs) as potential biolarvicide in developing countries is limited due to development of resistance by target mosquitoes. Efforts are taken to look for appropriate formulations or combination of Bs to prevent or delay resistance problem. Here, we report the efficacy of a formulated Bs product to kill Bs resistant Culex quinquefasciatus Say larvae. The laboratory ...

background: the present study was undertaken to study the larvicidal activity of different extracts of nerium ole- ander leaves, and post-treatment temperature- toxicity relationship of these extracts against culex pipiens. further, the most potent extract was used to evaluate its biological and genotoxic activities. methods: crude extracts of n. oleander leaves were prepared using water, chlor...

IN an earlier paper (Wigglesworth, 19336) it was shown that the cuticle of the mosquito larva Aedes aegypti (= argenteus) is permeable to water only at the anal papillae, and that water is taken in continuously by these organs and excreted by the Malpighian tubules; observations which were confirmed by Pagast (1936). But a more important function of the anal papillae has recently been made clea...

BACKGROUND & OBJECTIVES Japanese encephalitis virus (JEV), a mosquito borne pathogen, is one of the major causes of viral encephalitis in eastern Uttar Pradesh, India. The objective of this work was to evaluate the entomological based virological surveillance of Japanese encephalitis (JE) in the highly endemic area of eastern Uttar Pradesh. METHODS The study was carried out during September 2...

The orange-red spectrum of  the skin of  electric yellow (Labidochromis caeruleus) is  one  of  the  idealistic and  necessary  schemas sought  by  aquarists  and commercial producers. In this study, the effect of live foods meal on the skin coloration of juvenile electric yellow was examined. 270 fish with an average living body weight was 0.42 ± 0.11 g, and average total length was 3...

Mosquitoes of the Culex pipiens Linné, 1758 complex are distributed all over the world, and are of great medical and veterinary importance. They are active bloodsuckers primarily in urban environments, and serve as vectors of various pathogens infecting man and/or animals. This complex is characterized by a high ecological plasticity, and intricate taxonomic structure. The complex includes C. p...

BACKGROUND & OBJECTIVES The predatory potential of the larvivorous fishes can be affected by the presence of alternative preys. In the present study the predation pattern of the sewage dwelling Poecilia reticulata (Peters 1872) on the larvae of Culex quinquefasciatus Say 1823 (Diptera: Culicidae) was evaluated in the presence of alternative preys. METHODS The predation of Cx. quinquefasciatus...

The health challenges associated with pathogens and ectoparasites highlight the need for effective control approaches. Metal nanoparticles have been proposed as highly effective tools towards combatting different microbial organisms and parasites. The present work reports the antimicrobial and larvicidal potential of biosynthesized Ag/Ag₂O nanoparticles using aqueous leaf extract of Eupatorium ...

Two insecticidal bacteria are used as larvicides to control larvae of nuisance and vector mosquitoes in many countries, Bacillus thuringiensis ssp. israelensis and B. sphaericus. Field studies show both are effective, but serious resistance, as high as 50 000-fold, has evolved where B. sphaericus is used against Culex mosquitoes. To improve efficacy and deal with even greater potential problems...

We conducted an inventory in the wilaya of Batna more particularly region Timgad during period from January 2018 to December same year. Sampling is done monthly using “Dipping” method collect mosquito larvae which were then transported laboratory for identification. Five species collected surveyed site presented by 1035 individuals, these Culex pipiens, theileri, hortensis, deserticola and Culi...