For clarity, Fig. 3 depicts the model results only for July 2012
application. Modeling results showed a maximal CP air concentration
in the orchard vicinity during application night, a reduction
in the following day (08:00e22:00), and a secondary increase in
the following night. According to the model, the increase in CP air
concentrations on the night of July 5th is not a result of the residual
application that took place during that night (Table 1), but most
likely due to the weak winds that prevailed. In fact, the model results
shown in Fig. 3 are without consideration of this second
application. This second-night increase was also observed for the
modeling results of May 2010 and July 2011. When looking at the
temporal trends of the measured results this increase is shown only
at the July 2012 campaign. This is probably due to the long sampling
time in the previous campaigns that averaged out the measurements
and masked such temporal trend.