Pollen analyses

The origin of pollen in the pollen pellets can be identified through their colour and their palynologic analysis (see Delaplane et al., 2013a). Pollen provides a good tool to monitor the environment of the colony. Palynologic analysis should as well be carried out in honey samples. Therefore, in the week previous to the expected blooming of the treated and control crop and once weekly during this period, pollen samples should be taken with the help of pollen traps (see Human et al., 2013). Pollen origin analysis can be used to complete the information on the environment collected from the satellite images.