est to measure the respiration rates of the fumigated and unfumigated termites. The results of this experiment showed a definite increase in the rate of oxygen uptake in the case of the fumigated insect. The respiratory quotient was increased from 0.5 to 1.0. The fluoride probably disrupts the basic energetics of the cell in some manner

Administration of Diazinon was discontinued on August 7, 1961. There was no apparent excretion of the insecticide in milk even at the extremely high level of intake. Diazinon is apparently altered in some manner in the digestive system of the dairy cow since the insecticide was recovered from the butterfat separated from milk to which it had been added.A maximum single nontoxic dose of 10 mg. per kg. has been reported by Radeleff (2) for adult cattle. The two cows at the highest level received 8.2

Atrazine, ametryne, and PCP, all labeled with 14C, were applied to sugarcane and the movement of radioactivity in the plant was followed to determine the fate of their residues. Atrazine-14C and PCP-14C, applied to sugarcane leaf blades, remained at the site of treatment, but with substantial losses of radioactivity. As the leaves naturally abscised, all radioactivity was lost from the plant. applied in nutrient solution to roots of growing plants was absorbed by the roots and did not trans-locate. With time, considerable radioactivity was lost from the roots and solution. Gas chromatography of the root extracts showed that less than 10% of the radioactivity was in the form of PCP. Atrazine-14C and ametryne-14C translocated readily from roots to green leaves with less than 10% of the total recoverable radioactivity in the stalk at any time; radioactive residues were lost from the growing plant as leaves abscised.

by rats, primarily in the urine and, to a lesser extent, through the feces. Preliminary data indicate phthalamic acid or a closely related water-soluble derivative to be the major metabolite of excretion, thus suggesting that in the rat, as in the cotton plant (75) and the steer (70), Imidan detoxication involves

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