For pollinating certain crops such as cranberries, bumblebees are far more efficient than honeybees
This is because a bumblebee tends to visit only a few plant species in a limited area, whereas a honeybee generally flies over a much broader area and visits a wider variety of species
If a honeybee visits a wider variety of plant species than a bumblebee visits, the honeybee will be less efficient than the bumblebee at pollinating any one of those species.