188.8.131.52.2. Consecutive trials
In case the treatment and the control trials were carried out consecutively (control trial: first week, treatment trial: second week), in the same field, the study could be considered valid if it meets the following conditions:
- before application, the mortality and the foraging activity of the hives are standard (mortality comparable to that detected in the same period in hives located in the same area in good health conditions and without environmental stress);
- weather conditions during the trials are similar;
- the tested crop’s attractiveness to bees is higher, compared to the surrounding area, during the trials.