tage-dependent dichlorvos and propoxur tolerance in a field population of the German cockroach, Blattella germanica Linnaeus (Blatodea: Blattellidae), was investigated in the laboratory using a topical application bioassay. The results showed the 6 week-old nymphs were more tolerant to dichlorvos and propoxur than the other ages tested. LD₅₀ values of dichlorvos and propoxur for the 6 week-old ...

Inappropriate use of toxic chemicals is common in developing countries, where it leads to excessive exposure and high risks of unintentional poisoning. Risks are particularly high with the pesticides used in agriculture, poor rural populations live and work in close proximity to these compounds and often store these compounds in and around their homes. It is estimated that most of the death fro...

effects of four pesticides (imidacloprid, dichlorvos, pymetrozine and abamectin) were evaluated on life table parameters of orius albidipennis (reuter). pesticides were used at the concentrations recommended by the manufacturers. the bioassays were carried out using drum-cell method, in a growth chamber at 27 â± 1âºc, r.h. of 65 â± 5% and 16 h photo phase. the net reproductive rate (r0) value f...

The aim of the study was to determine the effects of taurine in rats exposed to subacute dichlorvos toxicity. Fifty rats were weighed and assigned into five groups of ten rats each. The groups received: distilled water, soya oil (1 ml/kg), taurine (50 mg/kg), dichlorvos (10 mg/kg) and the combination treatment group received taurine first and then dichlorvos 30 min later. The treatments were ad...

Objective: Aim of this study was to evaluate the effect of Zingiber officinale in mitigating oxidative damage and reproductive toxicity in the testis, induced by chronic dichlorvos administration in male Wistar rats. Methods: Twenty-four adult male Wistar rats were divided into 4 groups of 6 rats in each group. Group I received olive oil (1 ml/kg bwt/day) and served as control group, while Grou...

In this work we investigated the inhibitory effect of Deltamethrin, Dichlorvos, Malathion and Lambdacyhalothrin on bovine liver catalase (CAT) activity. We observed that the inhibition of enzyme increased with increasing concentrations of the pesticides from 0 to 250 ppm. The Kinetics conformed to the MichaelisMenten model and a Lineweaver-Burk graph of CAT was drawn. To identify the inhibition...

Dichlorvos (dimethyl 2,2-dichlorovinyl phos­ phate) is a methylating compound 1 and it has been shown to methylate nucleic acid in vitro 2’ 3 and in bacteria3’ 4 as well as to yield 7-methylguanine in mice following i.p. injection and inhalation ex­ posure 4. In the present study two male R strain rats (240 and 260 g, 3 1/2 months old) were given 225 /<Ci of [14C-methyl]-dichlorvos (3.2 mCi/mmo...

Susceptibility of Alphitobius diaperinus (Panzer) (Coleoptera, Tenebrionidae) to cypermethrin, dichlorvos and triflumuron in southern Brazil. The lesser mealworm, Alphitobius diaperinus (Panzer), is an important insect pest in poultry houses in Brazil. Susceptibility of the lesser mealworm collected from eight poultry houses in Paraná state, southern Brazil, was evaluated for cypermethrin, dich...

Abstract Dichlorvos is an organophosphorus insecticide frequently detected in surface waters all around the world. From evaluation of environmental quality concentrations (EQC) for dichlorvos adopted by different countries, it was observed a wide variability among them. This despite regulatory EQC-values are typically based on toxicity data and species sensitivity distribution (SSD) investigate...

Ageing is a complex process and understanding the factors affecting ageing and end points of study design are complicated and needs to be addressed through various strategies. In this study we have evaluated the ageing process on exposure to low doses of dichlorvos an organophosphorous insecticide used in controlling crop pests and also used in warfare agent and elucidated the various degrees o...