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

Publisher Website
Google Scholar
Abstract
Aldrin was applied at 5 lb per acre to Carrington silt loam plots, employing 4 application variables: 1) emulsion left on the soil surface, 2) emulsion incorporated into the soil, 3) granules left on the soil surface, and 4) granules incorporated into the soil. Carrots were grown in these soils, to study the effect of mode of application on the rate of translocation of insecticidal residues into the crop tissue. The greatest loss of residues occurred in soils where the insecticidal was left on the soil surface following an emulsion application. The greatest persistence of residues was noticed after granules had been incorporated into the upper 4-5-inch soil layer. Forty to 62% of the applied dosage was recovered in the form of aldrin or dieldrin 1 year after the insecticide had been incorporated into the soil. Only 6.5 to 13% of the applied dosage was recovered from soils where aldrin was left on the surface. The highest rate of aldrin epoxidation occurred in emulsion-treated soils. The greatest residues in carrots were found in those grown in soils into which the insecticide had been incorporated as an emulsion, although the comparable granule-treated soil contained 1.5 times more toxicants. Residue levels in carrots grown on the 4 differently treated plots did not vary as much as did the soil residue levels.

This publication has 0 references indexed in Scilit: