Abstract: Imidacloprid is a systemic insecticide for protecting the plants against pests. The treatments of imidacloprid can be applied by spraying directly on the plant surface or by seed dressing etc. The residue of impidacloprid in the nectar and pollens of the plants would poison the honeybee adults and larvae. It has been shown that the development of the honeybee larvae were severely impeded when the larvae were fed with the contaminated nectar or pollen gathered by the bee workers. However, our understanding on the harzard of imidacloprid posed to the honeybee larvae still remains incomplete. In order to access the effects of impidacopride to the honeybee larvae, the objective of this study is firstly to determine the lowest concentration of imidacloprid which causes adverse effect to the larvae. Secondly, the effect of imidacloptrid to the survival, capped brood, pupated and eclosion rate of the larvae, and the behaviour of the adults after eclosion will be accessed by feeding the larvae a low concentration of imidacloptrid in their diet.