Abstract
When acetamiprid was sprayed by an air-blaster on pine trees to control the Japanese pine sawyer in June 2004 and May 2005, in Gunma prefecture, the insecticide drift was monitored and the possible health effects assessed. The atmospheric concentration determined resulted in no or an extremely low level, suggesting little drift of the insecticide to the surrounding area. Deposition of the insecticide to the ground was also determined. A relatively large amount of deposition was found within the sprayed area, but that in the surrounding area was extremely small. Bio-monitoring using green-peach aphid showed 100% mortality within the sprayed area, but no significant effect in the surrounding area.
