COMPARISONS OF POLLEN REMOVAL AND DEPOSITION BY HONEY BEES AND BUMBLEBEES VISITING APPLE

摘要

The relative values of pollinators to crops depend on how much pollen they remove from anthers as well as how much they deposit on stigmas. On apples. Apis workers and Bombus queens differ in both pollen deposition and removal because they frequently adopt different foraging behaviors. Nectar-collecting Apis removed fewer pollen grains from the anthers of cv Delicious than did nectar- and pollen-collecting Bombus. On cv Rome, Apis deposited fewer grains on stigmas than Bombus, but removed equivalent amounts.