The 96 hrs LC50 values for malathion and glyphosate was determined to be 9.1 ppm and 5.5 ppb, respectively on the fairy shrimp, Streptocephalus dichotomus preadults. The 1/5 of 96 hrs LC50 of malathion (2.0 ppm) and glyphosate (1.1 ppb) respectively was chosen. The sub lethal toxic effect of each of these pesticides on the acetylcholinesterase activity (AchE) of S. dichotomus was assayed on day...

The relationship between malathion droplet size (VMD) and degree of damage to 1990, 1K and 2K General Motors paint standards was investigated in the laboratory and field. Laboratory tests indicated a positive correlation between malathion droplet VMD and damage spot size. Laboratory settling chamber tests revealed that size-thresholds of droplets too small to cause visible damage averaged 8 and...

Electrochemical cycling of silver surfaces in the presence of the organophosphonates paraoxon and malathion leads to changes in the electrochemical response of silver and the formation of silver nanostructures. Adsorption of the organophosphonates onto the silver surfaces causes a significant reduction in the observed current response due to an increase in the charge transfer resistance. Surfac...

A simple and rapid method is described for the estimation of some organophosphorus insecticides in the serum of occupationally exposed persons. The compounds are extracted with a mixture of acetone and diethyl ether (1:1 v/v) in acidic medium and the extraction residue is analyzed by gas chromatography with nitrogen phosphorus detection method. Linearity was acceptable over concentrations from ...

movement of pesticides through soils to groundwater and surface water has long been considered a potentially serious environmental problem in different parts of the world. remediation of such problems requires monitoring of site specific data. considering these facts a laboratory based investigation was carried out to determine the sorption and leaching parameters of two contrasting and widely ...

The present study aimed at verifying the usefulness of dietary 2.5% bee-pollen (BP) or propolis (PROP) to overcome the genotoxic and endocrine disruptive effects of malathion polluted water in Oreochromis niloticus (O. niloticus). The acute toxicity test was conducted in O. niloticus in various concentrations (0-8 ppm); mortality rate was assessed daily for 96 h. The 96 h-LC50 was 5 ppm and the...

<p><strong>Background.</strong> Resistance to an insecticide is what determines its effectiveness and the lack of information limits in control boll weevil cotton crops. <strong>Objective.</strong> The objective study was determine susceptibility (<em>Anthonomus grandis</em> Boheman) malathion Laguna, Mexico. Currently, this pest considered as one with ...