Organochlorine pesticides residues in adipose tissue in Spain

Environmentally Dangerous Products

Swabbing of stems of coffee plants with 1% BHC insecticide solution to control the stem-borer has been found very effective in India. In view of its wide use on coffee estates, an investigation was made of the possibilities of contamination of coffee beans themselves, of the soil by inevitable drips, and of ponds and rivers (with a risk to drinking water) by leaching out in rain water. The following samples were taken from 5 coffee estates: bark scraped from plant stems, and coffee beans, 55; soil samples below plants at 5, 10, 15, 25 and 45 cm depth, 20; and water samples, 47. Residues of BHC were determined by a standard TLC method. Appreciable amounts (30-65 ppm) of BHC were absorbed on the bark, but none was translocated to the beans and there was no risk of its presence in the beverage. In spite of heavy rainfall residues in soil were small, amounting to 2-10 ppm at less than 5 cm depth, 3-4 ppm at 5-10 cm and nil at lower depths; this confirmed the known rapid degradation of BHC. The insecticide content of the water supplies ranged from 0.02 to 0.2 ppm and was higher than the levels considered acceptable in some cases; no residues were found in pond or river silt.

Investigations on BHC residues in drinking water from coffee plantations and coffee beans.

The chlorinated hydrocarbons aldrin, heptachlor, chlordane, and endrin, applied at 2 lb active per acre as granules to Tift Sandy Loam soil, resulted in relatively high residues in both shells and meats of harvested peanuts from the aldrin and heptachlor treatments, and in the whole nuts from the plots treated with endrin and chlordane. Residues of aldrin and heptachlor and their epoxides persisted in the soil in measurable amounts through the second growing season.

http://jee.oxfordjournals.org/content/jee/60/5/1289.full.pdf

Residues of Aldrin, Chlordane, Endrin, and Heptachlor in Peanuts Grown in Treated Soil

SUMMARY It is apparent that rice and wheat can metabolize nitrofen-14C in such a way as to produce a lignin fraction containing radioactivity. This association is either in the form of a lignin-nitrofen conjugate or as an integral part of one or more of the molecules which comprise the lignin. There was no species variation with respect to the percentage of radioactive residue associated with the lignin, and the position of the 14C label in the nitrofen molecule did not alter the percentage of radioactive residue associated with lignin. Wheat and rice appear to metabolize nitrofenJ4C to cellulose to only a limited extent. Only preemergence nitrofen-I4C treated rice straw appeared to incorporate signifi

Heptachlor and Dieldrin Disappearance from a Field Soil Measured by Annual Residue Determinations

Department of Chemical
Oceanography, School of Marine Sciences, Cochin University of Science and
Technology

Dynamics Of Pesticides In The Backwaters Of Kuttanad

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Dynamics Of Pesticides In The Backwaters Of Kuttanad