Background: There are several plant extractions which are being used for mosquito control. The aim of this study was to evaluate the efficacy of Olea vera, Linum usitatissimum and Piper nigera against Anopheles stephensi and Aedes aegypti under laboratory conditions. Methods: These tests were carried out using WHO recommended bioassay method for adult mosquitoes. Results: The extracts from blac...

In this study, we evaluated the toxicity effectiveness of berries crude extract of Endod [vernacular name (local native language, Amharic); Phytolacca dodecandra] against aquatic macroinvertebrates Baetidae (Mayflies) and Hydropsychidae (Caddisflies), under laboratory conditions. In Ethiopia, toxic plant, berries of Phytolacca dodecandra are being commonly used for washing clothes and to contro...

Bioassay tests were carried out to investigate the susceptibility status of two (3rd and 4th) instar larvae of Culex quenquifasciatus Say populations of Dhaka city against two organophosphate (malathion and chloropyrifos) and two pyrithroid (cypermethrin and lambdacyhalothrin) insecticides. The LC50 values of malathion, chloropyrifos, cypermetrin and lambdacyhalothrin against the 3rd instar lar...

Over the world, more than 50% of persons with filariasis receive their infections from the bites of mosquitoes, particularly C. quinquefasciatus. Some photochemical comprise toxic compounds that can be exploited to control mosquito larvae. Gaultheria oil or wintergreen oil which contains methyl salicylate as a major component and has been used in the present study to investigate the larvicidal,...

Methanol leaf extracts of two Ethiopian traditional medicinal plants viz., Lomisar [vernacular name (local native language, Amharic); Cymbopogon citratus (DC) Stapf. (Poaceae)] and Bisana [vernacular name (local native language, Amharic); Croton macrostachyus Del. (Euphorbiaceae)] were screened for larvicidal activity against late third instar larvae of Anopheles arabiensis Patton, a potent mal...

Laboratory studies were carried out to ascertain the current susceptibility status of adult and larval stages of the Culex tritaeniorhynchus mosquito, vector of Japanese encephalitis, to various insecticides used under public health programs in India. The present study revealed that exposure of adult mosquitoes to diagnostic concentrations of DDT - 4.0%, malathion - 5.0%, fenitrothion - 1.0%, a...

Background. Outbreaks of the West Nile virus infection were reported in Morocco in 1996, 2003, and 2010. Culex pipiens was strongly suspected as the vector responsible for transmission. In the North center of Morocco, this species has developed resistance to synthetic insecticides. There is an urgent need to find alternatives to the insecticides as natural biocides. Objective. In this work, the...

Steam distillation of essential oils of aerial parts of Thymus capitatus and Marrubium vulgare L. collected at North cost of Egypt yielded 0.5% and 0.2%, respectively. Results of Gas chromatography-mass spectrometry analyses of the two samples identified 96.27% and 90.19% of the total oil composition for T. capitatus and M. vulgare, respectively. The two oil samples appeared dominated by the ox...

Bioassay was conducted to determine the susceptibility level of the adults of Callosobruchus chinensis, Sitophilus granarius and Tribolium casteneum against four BT isolates (1i, 27s, 27f and HD73) where mortality effects were counted from 24 to 192 hours (8 days) at 24 hours of intervals. All strains of BT were highly active against C. chinensis and the LC50 were found to be 0.30, 0.73, 0.62 a...

Larvae of Florida Keys Ochlerotatus taeniorhynchus collected from No Name Key were colonized and evaluated against technical S-methoprene in laboratory beaker tests. Glassware was treated with a silanizing reagent before testing to prevent methoprene attachment to the glassware. The No Name Key strain was compared with a susceptible laboratory strain of Oc. taeniorhynchus. Five serial dilutions...