Tolerance of Farm Animals to Feed Containing 2,4-Dichlorophenoxyacetic Acid

Pesticide Effects on Vitamin Metabolism, Carotenoid and Vitamin A Concentrations in Serum and Liver of Steers Fed Forages Treated with DDT or MCPA

“…"Natural" desorption-i.e., after "normal" aeration in situ-followed by accelerated desorption of the residues by thermal stripping is used in the analytical determination. Exploratory tests on oats (7) show that residue levels after EDC-CT-EDB mixtures are applied are small but, interestingly, in a similar intercomponent ratio as was shown by experimental isotherms described herein. Such work will be reported more fully.…”

“…Liver biopsy samples were taken at approximately monthly intervals by the technique of Erwin et al (7) and blood samples were collected at approximately 2-week intervals. Vitamin A and carotenoids were determined in the liver samples by the method of Gallup and Hoefer (2).…”

“…Hodgson, and Gaetjens (7) have not demonstrated any harmful effects to sheep or cows grazed on pasturage treated with 2,4-D, or to a cow fed over 5 grams daily of the herbicide. Although there was no gross effect of 2,4-D on performance of the animals, some case reports (4) have suggested that vitamin A utilization may be impaired by MCPA in suckling calves.…”

Residual aspects of 2,4,5-T and an ester in sheep and cattle with observations on concomitant toxicological effects

“…Chlorophenoxy herbicides are relatively less toxic to animals than many other pesticidal chemicals. Poisoning can occur in cases of gross negligence when all available water and/or feed are contaminated, or in instances in which animals are exposed to large amounts of concentrated technical material (Mitchell et al, 1946;Palmer, 1963;Palmer and Radeleff, 1969;Willard, 1951).…”