A chemical residue survey in relation to the 1980 spruce budworm spray program in New Brunswick, Canada

This paper describes the results from a pesticide residue survey conducted in relation to the 1980 spraying of insecticides in New Brunswick (Canada) to preserve the coniferous forest from an on-going spruce budworm infestation. A total of 465 water and air samples were collected from 12 sites throughout the Province. In water, fenitrothion was usually detected at about the same time that spraying occurred in the immediate area of the sites. The maximum that was ever detected was 20.0 ppb and persistence was usually limited to a few days except in a small pond where fenitrothion was detected for a total of 18 consecutive days. Aminofenitrothion was also detected at a maximum of 8.0 ppb. Fenitrothion was only detected occasionally in air samples the maximum being 1.2 ng/dm3. However, amino-fenitrothion was present in several air samples at a maximum of 12.0 ng/dm3.