A method is described for the determination of organochlorine pesticide residues in human gallstones. The difficulty caused by the presence of large amounts of cholesterol in the stones is overcome by an acetylation step in the “clean-up” procedure, and the method finishes with identification and determination of the individual pesticides by gas-liquid chromatography. Results are given for 28 s...

anti-larval measures were carried out in and around the city of abadan in conjunction with residual spraying against the only malaria vector of the area.  a.stephensi which has developed resistance to both ddt and dieldrin. there is evidence that larviciding is a valuable measure for reducing the a. stephensi population when used as a supplement to malathion, which has relatively short residual...

Aldrin, p,p'-DDT, dieldrin, gamma chlordane. heptachlor, heptachlor epoxide, J-hydroxychlordene, and lindane were bioassayed against larvae of Anopheles quadrimaculatus Say; the remnant amounts of insecticide and metabolites in larvae and medium were determined by electron-affinity gas chromatography. The insecticides were surprisingly nonpersistent at concentrations normally used.

The response of adult females of the mosquito Culex pipiens molestus to six insecticides was evaluated. Adults were collected from two locations in the Amman area from May to October 1983. The F1 generation was exposed to paper-impregnated insecticides using WHO test kits. At both locations, the most toxic insecticides were permethrin, propoxur and ferpropathrin. Malathion, dieldrin and DDT wer...

Ecological risk assessment of pesticide residues is not only germane but critical in view their inherent health challenges and for informed decision-making process. This study was conducted to assess the levels contamination organochlorine water from Nwaniba River Uruan Local Government Area Akwa Ibom State. The analysis carried out using Gas Chromatography with electron capture detector (GC-EC...

Residues of organochlorine pesticides were determined in soils and drinking water sources in cocoa growing areas in Ghana. Soil samples analysed showed the presence of four organochlorine pesticide residues namely lindane (0.005-0.05 mg/kg), beta-HCH (<0.01-0.05 mg/kg), dieldrin (0.005-0.02 mg/kg), and p,p'-DDT (0.005-0.04 mg/kg), with dieldrin occurring most frequently. Similarly, organochlori...