In the present study, the larvicidal activity of crude extracts from the stem and fruits, their fractions and fresh fruit juice of Duranta repens were assayed against the larvae of Culex quinquefasciatus. The highest larval mortality was found in chloroform soluble fraction of stem (LC50 = 10.75 ppm in 12 h) and ethanol extract of fruits (LC50 = 8.51 ppm 12 h) of Duranta repens against I instar...

BACKGROUND Malaria is still a health problem in Iran. There are several vector control activities, including Indoor Residual spraying, using insecticide treated nets and larviciding including Temephos. In addition nuisance mosquitos are prevalent in the urban areas. So that evaluation of this species to larvicide will provide a clue for management of vector control activities. METHODS Two mos...

The high number of blackfly bites in a moist forest area of Cameroon, around the Sanaga river, was causing considerable nuisance and had led to a local ground-based larval control campaign. We have reviewed the 25 years of almost uninterrupted weekly larvicide applications in this area and emphasized the problems related to application difficulties, environmental pollution and blackfly resistan...

Beta-cyfluthrin (OMS 3051), a new synthetic pyrethroid and one of the stereoisomers of cyfluthrin, was studied for insecticidal activity against eight mosquito species. Its larvicidal activity with LC50 values of 5.62 x 10(-5) and 1.19 x 10(-4) mg/l respectively for Culex quinquefasciatus and Aedes aegypti was comparable with that of deltamethrin. This pyrethroid was more effective against the ...

or solid particles with a size in the range of 10–1000 nm. Depending upon the method of preparation, nanoparticles, nanospheres or nanocapsules can be obtained. Controlled release and particle degradation characteristics can readily be modulated by the choice of matrix constituents1. Efficacy of Chrysosporium tropicum, a pathogenic fungus mediated silver and gold nanoparticles was reported agai...