continuous and excessive use of organophosphorus compounds has led to thecontamination of water and soil ecosystems. the degradation of organophosphorusinsecticides, chlorpyrifos, chlorpyrifos- methyl, cyanophos and malathion in mineral saltsmedia were studied. the effect of additional biofertilizers, singly or combined withorganic amendments, on chlorpyrifos and cyanophos degrading activity in...

b a ckground: the present study was designed to investigate the insecticidal efficacy of four different classes of in-secticides: pyrethroids, organophosphates, phenyl-pyrazoles and neo-nicotenoids. one representative chemical from each class was selected to compare the toxicity: deltamethrin from pyrethroids, dichlorovinyl dimethyl phosphate (ddvp) from organophosphates, fipronil from phenyl-p...

background: the cutaneous leishmaniasis (cl) has been occurred in dehbakri county, located 46 km of bam dis­trict, kerman province since 2004–2005. phlebotomus papatasi is an important vector of zoonotic cutaneous leishmanisis (zcl) as well as sand fly fever and p. sergenti is considered as main vector of anthroponotic cutaneous leishmaniasis (acl) in iran. there are several measures for vector...

To evaluate the effectiveness of selected insecticides and a botanical extract in management of okra shoot and fruit borer, Earias vittella an experiment was conducted in the field Laboratory, Department of Entomology, Bangladesh Agricultural University, Mymensingh during January to May 2011. Effectiveness of two synthetic insecticides (Kinalux 25 EC and Ecofuran 5 G) and a botanical (Neem leaf...

cotton bollworm, helicoverpa armigera (hübner) is one of the most destructive insect pests on many crops in the world that has been found to develop resistance against conventional insecticides. using insecticides with different modes of action may result in appropriate control of the pest and delay insecticide resistance development. in this study, lethal and sublethal effects of emamectin ben...

Honeybee, Apis mellifera, is one of the most important pollinators in the world. Since pesticides have been used widely, honeybees are unavoidable at risk exposing to various contaminated sources of residual pesticides while they are engaging foraging activities in collecting nectar and pollens. The effects of various levels of sub-lethal dosages of insecticides on the biology, development and ...

A key new risk to our pollinators has been identified as exposure to neonicotinoid insecticides. These discoveries have refuelled the debate over whether or not the neonicotinoid insecticides should be banned and conflicting evidence is used in this battle. However, the issue is not black or white, but gray. It is not an issue of whether the neonicotinoids are toxic to insects or not. Clearly, ...

Structure-toxicity relationships were studied for a set of 67 insecticides by means of multiple linear regression (MLR). The values of log LD50 (lethal dose 50, oral, rat) of the studied compounds were well correlated with the descriptors encoding the chemical structures. Considering the pertinent descriptors, a correlation coefficient of 0.87 (s = 0.42, n = 67) was obtained for the MLR model. ...

Chemical insecticides have been commonly used to control agricultural pests, termites, and biological vectors such as mosquitoes and ticks. However, the harmful impacts of toxic chemical insecticides on the environment, the development of resistance in pests and vectors towards chemical insecticides, and public concern have driven extensive research for alternatives, especially biological contr...