Growing apples. Pollination

Apples are self-incompatible; they must cross-pollinate to develop fruit. During the flowering each season, apple growers usually provide pollinators to carry the pollen. Honeybee hives are most commonly used. Orchard mason bees are also used as supplemental pollinators in commercial orchards. Bumble bee queens are sometimes present in orchards, but not usually in enough quantity to be significant pollinators.

There are four to seven pollination groups in apples depending on climate:
Group A – Early flowering, May 1 to 3 in England (Gravenstein, Red Astrachan)
Group B – May 4 to 7 (Idared, McIntosh)
Group C – Mid-season flowering, May 8 to 11 (Granny Smith, Cox's Orange Pippin)
Group D – Mid/Late season flowering, May 12 to 15 (Golden Delicious, Calville Blanc d'Hiver).
Group E – Late flowering, May 16 to 18 (Braeburn, Reinette d'Orléans)
Group F – May 19 to 23 (Suntan)
Group G – May 24 to 28 (Court Pendu Plat)

One cultivar can be pollinized by a compatible cultivar from the same group or close (A with A or A with B but not A with C or D).

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Fruit:

All about Fruits! - Botanic fruit and culinary fruit - Fruit development - Simple fruit - Aggregate fruit.

Banana:

Banana is the common name for a fruit and also the herbaceous plants of the genus Musa which produce the commonly eaten fruit - The banana plant is a pseudostem that grows to 6 to 7.6 metres (20-25 feet) tall, growing from a corm - Bananas come in a variety of sizes and colors when ripe, including yellow, purple and red - Bananas and plantains constitute a major staple food crop for millions of people in developing countries - The domestication of bananas took place in southeastern Asia. Many species of wild bananas still occur in New Guinea, Malaysia, Indonesia and the Philippines.