220.127.116.11.1.7. Wind conditions, direction, weather conditions
1) The field site needs to be carefully chosen as it should be determined that sufficient drift directed into the exposed flowering crop occurs.
2) Wind speed and wind direction especially during sowing needs to be documented and reported. For achieving the worst case exposure, fields should be established to ensure that all dusts drift into the flowering crop. Since it is not possible to predict the wind direction several days before start of the experiment, it is recommended to have flowering neighbouring crops on two sides, representing two main wind directions. The trial set up and the availability of uncontaminated forage needs to be carefully considered in the interpretation of the results.
3) Other weather conditions before, during and after sowing have to be reported in the same way as for experiments with spray applications.