Effective pollination is essential for fruit set in apple orchards, which depend on cross-fertilisation due to the self-infertile nature of most varieties. A number of practical techniques can be used to ensure timely and sufficient pollination. The following approaches were promoted to increase fertilisation success and improve fruit quality:
Maintaining pollinizer variety ratios
A pollinizer variety ratio of 33% is recommended in orchards to ensure adequate availability of compatible pollen during flowering. Insufficient ratios are a common cause of poor fruit set.
Grafting pollinizer branches
Pollinizer branches from compatible varieties can be grafted onto main crop trees to improve access to compatible pollen without dedicating entire trees. Grafting helps increase pollination efficiency after two to three years.
Flower bouquet method
Cut branches of a pollinizer variety are placed in bottles or bags of water and tied within the canopy of flowering trees. This offers a temporary boost in pollinizer presence during the flowering period, though the method requires effort and the reliability of flower sources can vary.
Use of pollen dispensers
Pollen dispensers installed at hive entrances help distribute pollen when flowering is not synchronised between varieties. Bees walk through the dispenser as they exit, carrying pollen to crop flowers.
Timely hive placement and management
Honeybee colonies should be placed at 5–10% bloom to ensure pollination during the Effective Pollination Period. Recommended strength is 6–8 frames, including 3–4 frames of brood. Colonies should be placed in sheltered areas and supplied with nearby water sources to maintain activity.