Head lice, Pediculis capitis De Geer, populations were investigated for permethrin and malathion resistance after initial establishment of a discriminating dose of topical application bioassay with body lice, Pediculus humanus L. For both insecticides, approximately 2 times the lethal dose (LD)95 at 4 h was selected, 2 ng of permethrin and 100 ng of malathion per head louse, respectively. Head ...

The correlation between malathion resistance and fecundity was investigated in the fruit fly, Drosophila melanogaster. Previous studies have shown that insecticide resistance is negatively correlated with reproductive components in insects. To investigate this relationship, the fecundity (egg production) was determined in 2 natural and 2 esterase 6 (Est-6) marker populations (4016 and 4211) and...

Features of pesticide synergism and acetylcholinesterase (AChE) inhibition (in vitro) were studied using a selected range of organotin compounds against the early 4th instar larvae of a highly resistant strain of the diamondback moth (DBM), Plutella xylostella, a major universal pest of cruciferous vegetables.Fourteen triorganotin compounds were evaluated for their ability to enhance the toxici...

pesticides are used extensively in agricultural lands in northern provinces of iran which makes river ecosystems more vulnerable to pesticides pollution. this study was conducted in three river estuaries (babolrud, tajanrud and gorganrud), focusing mainly on the concentration levels of organophosphate pesticides (diazinon, malathion, azinphos-methyl) in the muscle tissue of golden mullet fish, ...

malathion (s-(1, 2-dicarboethoxyethyl) o, o-dimethyl phosphorodithioate) is one of the organophosphate pesticides comprehensively used in agriculture fields throughout the world. in spite of widely used, little information are available about dna damage in aquatic organisms. therefore, the present study carried out to investigation of dna damage induced by malathion in cyprinus carpio (pisces: ...

It has been shown that aerial applications of malathion have been effective in controlling Aedes ae.gpti in urban areas of Thailand (l-3) and Indonesia (4). Aerial applications of malathion have also been made in the Bahamas and Jamaica during the Caribbean dengue epidemic of 1977 (5) and additional aerial spraying operations have been conducted in Tapachula and other cities of southern Mexico,...

An extraction method based on matrix solid phase dispersion (MSPD) and high performance liquid chromatography with UV detection for quantification of two widely used pesticides (Malathion and α-Endosulfan) in Khazar rice from north of Iran were investigated. The ratio of solid phase (adsorbent) to sample, types of eluting solvent and its volume were optimized to achieve the highest recoveries f...

background: organophosphorus pesticides are one of the most prevalent usages for pest control in the country. such pesti­cides enter into water sources by different routes. since drinking of contaminated water at the higher doses than the standard level, may causes undesirable effects to human health and ecosystem. the object of this research was to investigate the ef­fect of various parameters...

to determine the degree of susceptibility of an. sacharovi to malathion 5%, fenitrothion 1% and ddt 4% extended studies were carried out on sucked blood engorged mosquitoes collected from dasht argen (fars province) in 1997. testing method was according to standard who method in lots of 25 adults' mosquitoes in 4 replicates. an. sacharovi were touched by malathion 5% and ddt 4% insecticides in ...

background: organophosphorus pesticides has been widely used in agriculture fields to control various crop insects and their extensive use pose human life at threat because of their adverse effects on human health. in this study, we checked the effects of gst polymorphism on ameliorative effect of curcumin and carvacrol against dna damages. methods: comet assay was used to assess the dna damage...