Effect of Feeding Carbofuran on the Physiology of the Dairy Cow and on Pesticide Residues in Milk

One Holstein cow was given one dose of 5g carbofuran in a gelatin capsule, and 8 cows were fed carbofuran of from 0.5 to 3.0g per day mixed with silage for an extended time to determine the effect of pesticide on the physiology of the cow and on residues in milk. The 5g single dose caused acute symptoms of toxicity within 30 minutes. However, the cow recovered following atrophine administration. The addition of 0.5 to 1.0g of carbofuran to silage caused some minor nervous symptoms in cows immediately following initial feedings. At subsequent feedings, silage consumption was slower and no clinical symptoms were observed. The concentration of carbofuran in silage had a significant effect (P