Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)

Department / School



Data on the rate of uptake, translocation, expiration, and metabolism of diazinon in alfalfa were obtained. Non-radioactive, C14 ring labeled of C14 ethyl labeled diazinon was applied at the equivalent rate of 1 lb./acre calculated at a 6 in. depth. Absorption was rapid with detectable quantities if diazinon appearing in the plant within the first 24 hours after treatment. Residue levels in the plant remained relatively constant during the period from 9 to 15 days after treatment. Loss of diazinon from soil was rapid with an average of 15% of the applied material remaining 15 days after treatment. No metabolites of diazinon, including diazoxon, were found in any of the soil of alfalfa samples analyzed by gas chromatography, thin layer chromatography, or radioautography during the period from tine of treatment through 15 days post treatment. No radioactive CO2 was detected as a metabolite of C14 diazinon treatments. Diazinon was expired by alfalfa plant after being absorbed into the plant.

Library of Congress Subject Headings

Insecticides Alfalfa



Number of Pages



South Dakota State University