Effect of Formulation and Mode of Application of Aldrin on the Loss of Aldrin and Its Epoxide from Soils and Their Translocation into Carrots1

Degradation of aldrin and heptachlor in field soils during a ten-year period. Translocation into crops

“…Soil and crop samples obtained through 1961 were extracted, cleaned up, and analyzed colorimetrically as described (Lichtenstein, 1960). Samples that were obtained in 1962 were analyzed by both colorimetric and gas-liquid chromatographic (GLC) methods (Lichtenstein et al, 1964).…”

Organochlorine insecticide residues in agricultural soil and legume crops in northeastern Saskatchewan

“…The ratio of concentration of dieldrin in soil to dieldrin in sweet clover or alfalfa was 1 to 1 to 6 to 1. This is as high as the uptake by carrots from contaminated soil (Lichtenstein, et al, 1964), and much higher than by wheat plants (Saha and McDonald, 1967b). In an earlier experiment (Saha and McDonald, 1967a), sweet clover grown in soil treated the previous year with 8 pounds of endrin or aldrin per acre contained 0.14 and 0.09 p.p.m.…”

Insecticide Uptake from Soils, Absorption of Insecticidal Residues from Contaminated Soils into Five Carrot Varieties

“…At the same time, soil samples were collected from the total areas of each experimental plot. Both carrots and soils were extracted and analyzed by gas liquid chromatography, as previously mentioned (5).…”

“…The analytical result of this sample should be similar to the sum of the data obtained from analyses of the upper three 2-inch soil layers. Soils and carrots were extracted and analyzed by gas liquid chromatography as previously described (5).…”

“…The amount of insecticides absorbed and translocated into various plant tissues is dependent on the insecticide employed, the particular crop, and the soil type in which the crop is grown (3). Carrots are outstanding in their ability to absorb pesticidal residues from soils (2, 4,5,17).…”