Residue Studies on Aldrin and Dieldrin in Soils, Water, and Crawfish from Rice Fields Having Insecticide Contamination1

Persistence of pesticides in river water

“…Hill and McCarty (1967) studied the degradation of some chlorinated hydrocarbon pesticides under anaerobic conditions. Gannon and Bigger (1958) and Hendrick et al (1966) studied the conversion of aldrin to dieldrin in soil and water. All of these studies were limited to a few pesticides; extrapolation to other compounds in the same class is impossible due to the variable physical and chemical properties of the pesticides and the kind of change that they undergo.…”

Accumulation and elimination of dieldrin by channel catfish (Ictalurus punctatus)

“…Aldrin residues found in whole crayfish samples were several times greater than that found in the soil (Hendrick, et. ;.…”

“…Wurster (1971) described dieldrin as one of the most stable of all insecticides, and dieldrin residues remain active in the environ ment for many years. Hendrick, et £]_. (1966) found that aldrin con verted primarily to dieldrin during a one-year experiment.…”

Accumulation and elimination of dieldrin by channel catfish (Ictalurus punctatus)

“…LITERATURE REVIEW Wurster (1971) described dieldrin as one of the most stable of all insecticides, and dieldrin residues remain active in the environ ment for many years. Hendrick, et £]_. (1966) found that aldrin con verted primarily to dieldrin during a one-year experiment.…”

“…In addi tion to fish facing pollution problems, fish-food organisms become contaminated with pesticides. Chacko and Lockwood (1967) Aldrin residues found in whole crayfish samples were several times greater than that found in the soil (Hendrick, et. ;.…”