Impacts of agricultural practices on pyrethroid resistance in Culex pipiens pipiens, an important vector of human diseases, from Tunisia.

Agricultural pesticides may play a profound role in selection of resistance in field populations of mosquito vectors. The aim of the present study was to examine the relationship between agricultural pesticide use and development of resistance to insecticides in Culex pipiens pipiens from Tunisia. Entomological surveys were conducted in three various districts from Tunisia differ in insect control in agriculture and in public health.

The potential role of urbanization in the resistance to organophosphate insecticide in from Tunisia.

Objective: To examine the effects of urbanization on the resistance status of field populations of to organophosphate insecticide.

Methods: Bioassays and biochemical assays were conducted on Tunisian field populations of collected in four various areas differing in the degree of urbanization. Late third and early fourth larvae were used for bioassays with chlorpyrifos and adults mosquitoes for biochemical assays including esterase and acetyl cholinesterase (AChE) activities.

Evaluation of resistance to temephos insecticide in larvae collected from three districts of Tunisia.

Background: Mosquitoes are considered as the main groups of arthropods that cause nuisance and public health problems.

Objectives: Evaluation of resistance to temephos insecticide in larvae collected from three districts of Tunisia.

Methods: Late third and early fourth instars larvae of were collected in three localities of Northern and Southern Tunisia.

Resistance status to deltamethrin pyrethroid of (Diptera: Culicidae) collected from three districts of Tunisia.

Objectives: The aim of the present study was to determine the susceptibility status of populations against deltamehtrin insecticide.

Methods: Larvae of were collected from three breeding places in Northern and Southern Tunisia between 2003 and 2005. Early third and late fourth instars were tested against deltamethrin pyrethroid insecticide.

Multiple resistance mechanisms associated with low pirimifos-methyl resistance in Culex pipiens pipiens in three populations of Tunisia.

The aim of this study was to evaluate the resistance status of Culex pipiens pipiens to pirimiphos-methyl insecticide. Three field populations of mosquitoes were collected from Tunisia and analyzed in laboratory. The samples studied showed low level of resistance not exceeding 5-folds.