To the author's knowledge this is the first report of such detailed
air measurement following three different spraying events,
including both primary and secondary drift. All three campaigns
exhibit the same trends and the same order of magnitude for CP air
concentrations despite the different meteorological conditions.
Highest concentrations were measured at nighttime, when exposure
of people to outdoor pollutants is low. However, even in the
following day air concentrations were still close to1 mg m3
, far
above background-levels. The importance of measuring both the
pesticide applied and its degradation product has been shown.
Although CPO levels were much lower than those of CP, it is known
to have higher toxicity (Sparling and Fellers, 2007) and hence
should be monitored as well. Unfortunately, the health effect of
chronic exposure to such levels of CP and CPO is still widely
unknown.