ABSTRACT
Diallate will be released to the environment during its application as a pre-emergence herbicide for field crops such as sugar beets, flax, lentils, and peas. Diallate released to the atmosphere as aerosols or by volatilization from soil will be subject to gravitational settling and photodegradation. Diallate may be emitted, released in wastewater or spilled during its production, formulation, transport, and storage. Diallate released to the atmosphere during its application or volatilized from soil will photodegrade. Both the cis and trans isomers of diallate biodegrade at similar rates. The only volatile degradation product is carbon dioxide. Exposure to diallate will primarily be by dermal contact with the pesticide or treated soil and by inhalation of vapors or aerosols during handling or application of the pesticide or from vapors emanating from treated fields. Measurements of dermal and inhalation exposure of field operators were made during application of the herbicide diallate preemergent to sugar beets.
