This is where the blossom begins to develop into the fruit. The three components of successful pollination are pollinizers, pollinators, and the weather. Some apple tree varieties are self-fertile and cannot produce fruit by itself. Planting of different apple varieties that can cross-pollinate is essential for sucessful pollination. Pollinators Pollen is sticky and heavy and cannot be moved by wind to get to the stigma.
Insects are the natural pollinators.
In an organic orchard, there are many insects that help pollinate the blossoms. This is because there are no insecticides used. However, the main insect for pollinating is the honey bee. In search of nectar, the honey bee helps move the pollen from the anthers to the stigma with it's body and legs. Bee hives are placed in orchards with usually 2 hives per acre.