Monitoring and health effect assessment of spray drift following the application of fenitrothion EC by a radio-controlled helicopter over pine [Pinus] trees in Shizuoka prefecture [Japan]
2008
Ichikawa, Y.(Chiba Univ., Matsudo (Japan). Faculty of Horticulture) | Motoyama, N.
The present study monitored the atmospheric concentration and deposition on the ground of fenitrothion and fenitro-oxon over time following fenitrothion application by a radio-controlled helicopter over pine trees in Shizuoka prefecture. In all cases, the fenitrothion concentration in the atmosphere was lower than the permissible limit of 10 microg/cubic m assigned for residential areas. Fenitrothion deposition on the ground was higher within the sprayed area than the surrounding area, but in either area it was below the assumed no-adverse-effect level for dermal exposure. The mortality of houseflies placed within the sprayed area reached 100%, but was very low or insignificant in the surrounding area. Medical examination conducted before and after the application of 8 subjects engaged in drift monitoring as well as 2 subjects engaged in spraying showed no significant health effects.
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