Abstract
Conclusions
1. Dieldrin produced chronic toxicity in rabbits when it was applied once a week at 70 mg/kilo body weight. Less than 30 mg/kilo produced no symptoms. 2. Only 2 of 11 rats dipped in .125, .187, and .250% Dieldrin spray solutions died. 3. Dieldrin produced chronic toxicity in mature rabbits when fed orally approximately 60 mg/kilo body weight. Similar feeding of approximately 150 mg/kilo body weight was fatal to rats. 4. Liver and kidneys of all animals treated and analyzed were found to contain Dieldrin. The amount recovered in these organs was generally in proportion to the amount fed per week, not the duration of feeding. 5. Analyses of milk from cows sprayed with Dieldrin for external parasite control indicated a maximum of 5.9 p.p.m., which was gradually decreased regardless of continued application.
Get full access to this article
View all access options for this article.