In the present study, organophosphorus pesticides (OPs) (diazinon, methyl parathion, and parathion) were oxidized by bubbling ozone into a glass reactor. OP residues were detected using HPLC and ozonation intermediates were identified using GC-MS. The degradation of OPs followed pseudo-first-order kinetics through direct ozone oxidation and indirect hydroxyl radical oxidation. Diazinon, based o...

Onion thrips, Thrips tabaci Lindeman, were collected from commercial onion fields in 2001, 2002 and 2003 to assess resistance to lambda-cyhalothrin, deltamethrin and diazinon. In 2001, six of eight adult populations were resistant to lambda-cyhalothrin, with resistance ratios (RR) ranging from 2 to 13.1 and four of these were also resistant to deltamethrin, with RR ranging from 19.3 to 120. Thr...

BACKGROUND In the developing brain, serotonin (5HT) systems are among the most sensitive to disruption by organophosphates. OBJECTIVES We exposed neonatal rats to daily doses of diazinon or parathion on postnatal days (PND)1-4 and evaluated 5HT receptors and the 5HT transporter in brainstem and forebrain on PND5, focusing on doses of each agent below the maximum tolerated dose and spanning th...

J. Agric. Entomol. 9(4);273-281 (October 1992) ABSTRACT A portable automatic sprayer, actuated when cattle obtain mineral, was tested against face fiies and pyrethroid·resistanL horn nics using 0.5% Al dichlorvos in a waler spray mixture. Horn ny populations were initially 48-fold resistant to pCt-methrin with no '"esistancc to diazinon. Horn Oy control averaged 90.3 to 99.1% reduction. Resista...

Introduction: Diazinon is a moderately toxic broad-spectrum organophosphate, with a LD50 of 350 to 400 mg/kg for humans. Diazinon is absorbed through the skin and gastrointestinal tract and is rapidly metabolized within a few hours. Diazinon residues in melons and cucumbers have recently became a major health concern in Iran. Thus we decided to investigate Diazinon levels in melon and cucumbe...

diazinon is an organophosphate which exerts tissue damages by generating free radicals thereby inducing oxidative stress. the purpose of this study is to determine the protective effect of salvia officinalis l.extract on testes of rats intoxicated by diazinon. in this experimental study, 45 mature male rats were equally divided into three groups of control (c), diazinon (dzn) and diazinon-extra...