Nigel Cattlin / Flower opening series of images of an Apple from pink bud to king flower among a rosette of green leaves in spring Berkshire, England, UK.

Nigel Cattlin / Flower opening series of images of an apple from pink bud to king flower among a rosette of green leaves in spring Berkshire, England, UK.

Nigel Cattlin / Leaf and flower bud an apple twig swelling and starting to open in early spring Berkshire, England, UK.

Nigel Cattlin / Leaf and flower bud an apple twig swelling and starting to open in early spring Berkshire, England, UK.

Nigel Cattlin / Leaf and flower bud an apple twig swelling and starting to open in early spring Berkshire, England, UK.

Nigel Cattlin / Leaf and flower bud an apple twig swelling and starting to open in early spring Berkshire, England, UK.

Nigel Cattlin / Section through a leaf and flower bud of an Apple twig in late winter swelling and starting to open Berkshire, England, UK.

Nigel Cattlin / Tight leaf and flower bud of an Apple twig in late winter beginning to swell and starting to open Berkshire, England, UK.

Nigel Cattlin / Tight leaf and flower bud of an Apple twig in late winter beginning to swell and starting to open Berkshire, England, UK.

Nigel Cattlin / King flower, the apical dominant flower, on Apple buds and blossom among a rosette of green leaves in spring Berkshire, England, UK.

Nigel Cattlin / Apple flowers in pink bud shortly before they fully open in spring, April Berkshire, England, UK.

Duncan Usher / Cultivated Apple (Malus domestica) trees flowering in spring, Germany

Nigel Cattlin / Bramley apple tree (Malus domestica) blossom with young leaves in spring, Berkshire, UK. May.

Nigel Cattlin / Egremont Russet apple tree (Malus domestica) blossom with young leaves in spring, Berkshire, UK. May.

Nigel Cattlin / Egremont Russet apple tree (Malus domestica) blossom with young leaves in spring, Berkshire, UK. May.

Nigel Cattlin / Cox's orange pippin apple tree (Malus domestica) blossom and buds with young leaves in spring, Berkshire, UK. May.

Oliver Hellowell / RF - European goldfinch (Carduelis carduelis) perched in Apple tree (Malus domestica), Bishopswood, Somerset, UK. April. Cropped. (This image may be licensed either as rights managed or royalty free.)

Will Watson / Apple (Malus domestica) trees in orchard with ripe Falstaff eating apples, Wye Valley, Herefordshire, England, UK. October.

Roland Seitre / Adult European hornet (Vespa crabro) feeding on an apple (Malus domestica), near Tour, Central France.

Nigel Cattlin / Apple (Malus domesticus) orchard in flower, young trees with one tree having a grafted pollinator branch with pink flowers, Kent, UK. May.

Nigel Cattlin / Adult, female Apple mussel scale / Oystershell scale (Lepidosaphes ulmi) on the surface of an Apple (Malus domestica) fruit, Berkshire, England, UK.

Nigel Cattlin / Adult, female Apple mussel scale / Oystershell scale (Lepidosaphes ulmi) on the surface of an Apple (Malus domestica) fruit, Berkshire, England, UK.

Nigel Cattlin / Discreet spots caused by Apple scab (Venturia inaequalis) to skin surface of Apple (Malus domestica) fruit.

Nigel Cattlin / Codling moth (Cydia pomonella) exit hole on a ripe Bramley cooking apple (Malus domestica) on the tree, Berkshire, UK, August.

Nigel Cattlin / Red and green ripe mature Bramley cooking apples (Malus domestica) on the tree, Berkshire, UK, August.

Nigel Cattlin / Red and green ripe mature Bramley cooking apples (Malus domestica) on the tree, Berkshire, UK, August.

Nigel Cattlin / A European wasp (Vespula vullgaris) on red and green ripe mature Bramley cooking apples (Malus domestica) on the tree, Berkshire, UK, August.

Nigel Cattlin / Ripe red Discovery eating apple (Malus domestica) on the tree, Berkshire, UK, August.

Will Watson / Crab apples (Malus sylvestris), windfalls with Apple scab, Herrock Hill, Herefordshire, England, UK. November

Nigel Cattlin / Bitter pit, dark spots in the flesh of an apple caused by a lack of calcium (Calcium deficiency) late in the season in dry conditions.

Nigel Cattlin / Fruit eye rot (Neonectria ditissima) development of rot around the eye (blosson end) of and apple fruit

Nigel Cattlin / Fruit rot (Penicillium expansum) spore masses of a storage rot on a decaying apple fruit

Nigel Cattlin / Yellow mottling effect caused by apple mosaic virus (AMV) to a leaf from an apple fruit tree

Nigel Cattlin / Yellow mottling effect caused by apple mosaic virus (AMV) to a leaf from an apple fruit tree

Nigel Cattlin / Adult codling moth (Cydia pomonella) a major pest of fruit such as apples and pears on the surface of an apple, South Africa, February

Nigel Cattlin / Adult codling moth (Cydia pomonella) a major pest of fruit such as apples and pears on the surface of an apple, South Africa, February

John Waters / Mistletoe (Viscum album) growing on old Apple tree, (Malus domestica) Beside River Parrett, near Langport, Somerset, UK. March.

Nigel Cattlin / Mottling and reticulation of an apple leaf caused by apple mosaic virus (AMV)

Nigel Cattlin / Interveinal chlorosis a symptom of manganese deficiency on an apple leaf

Nigel Cattlin / Post-harvest penicillium storage mould (Penicillium italicum) mycelium and rot on stored apple fruit

Nigel Cattlin / Apple scab (Venturia inaequalis) infection spots germinated from a spore shower on an apple leaf, New York, USA,

Nigel Cattlin / Section of bark removed to show infection of apple union necrosis at the graft on an apple trunk, New York, USA, September

Nigel Cattlin / Cedar apple rust (Gymnosporangium juniperi-virginianae) pustules on the underside of an apple leaf, New York, USA, September

Nigel Cattlin / Cedar apple rust (Gymnosporangium juniperi-virginianae) lesions on the upper leaf surface of an apple leaf, New York, USA, September

Nigel Cattlin / Cedar apple rust (Gymnosporangium juniperi-virginianae) pustules on the underside of an apple leaf, New York, USA, September

Nigel Cattlin / Cedar apple rust (Gymnosporangium juniperi-virginianae) lesions on the upper leaf surface of an apple leaf, New York, USA, September

Nigel Cattlin / Powdery mildew (Podosphaera leucotricha) fungal disease infection with ascocarps on an apple twig, New York, USA, September

Nigel Cattlin / Apple scab (Venturia inaequalis) lesions and cracking on ripe on apple fruit, New York State, USA, September

Nigel Cattlin / Apple scab (Venturia inaequalis) lesions and cracking on ripe on apple fruit, New York State, USA, September

Nick Upton / Organic suburban garden with Apple (Malus domestica) tree in foreground, vegetables growing in beds iinclude Broad bean (Vicia faba), Lettuce (Lactuca sativa) and Kale (Brassica oleracea). Houses in b...

Warwick Sloss / Apple tree (Malus domestica) blossom flowers, Somerset, UK, April.

Warwick Sloss / Apple tree (Malus domestica) blossom flowers, Somerset, UK, April.

Ernie Janes / Bramley apple (Malus domestica) in flower, Norfolk, England, UK, April.

Nigel Cattlin / Wild crab apple (Malus sylvestris) large white to pink flowers and leaves in light woodland against a blue spring sky, Berkshire, England, UK, April,

Nigel Cattlin / Wild crab apple (Malus sylvestris) large white to pink flowers and leaves in light woodland against a blue spring sky, Berkshire, England, UK, April,

Nigel Cattlin / Spartan apples, ripe on branch in commercial orchard. Oxfordshire, England, UK. September.

Nigel Cattlin / Golden Delicious, ripe apples on branch amongst leaves. In commercial orchard, Oxfordshire, England, UK. September.

Nigel Cattlin / Cox Orange Pippin apples amongst leaves on tree in orchard. Oxfordshire, England, UK. September.

Nigel Cattlin / Apple canker (Neonectria ditissima) lesion in a branch of an old orchard tree. A fungus diseases, Berkshire, November.

Nigel Cattlin / Apple leaf curling aphid (Dysaphis devecta) and apple aphid (Aphis pomi) pests on a curled apple leaf

Nigel Cattlin / Blossom on a Discovery apple tree in a spring garden, Devon, May

Nigel Cattlin / Blossom on a Discovery apple tree in a spring garden, Devon, May

Nick Upton / Organic suburban garden with a mix of vegetables including Broad beans (Vicia faba) and Lettuce (Lactuca sativa), fruit including Apples (Malus domestica), herbs including Rosemary (Rosmarinus officin...

Nick Upton / Organic suburban garden with a mix of fruit including Apples (Malus domestica) and Raspberries (Rubus idaeus), vegetables including Broad beans (Vicia faba), Lettuce (Lactuca sativa) and Cavalo neroe...

Nick Upton / Organic suburban garden with a mix of vegetables including Broad beans (Vicia faba) and Lettuce (Lactuca sativa), fruit including Apples (Malus domestica) and Raspberries (Rubus idaeus), herbs includi...

Nick Upton / Blue tit (Parus caeruleus) perched on a Crab apple (Malus sylvestris) tree branch in garden, Wiltshire, UK, April.

Nigel Cattlin / Adult female predatory bug (Psallus ambiguus) and aphid predator on an apple leaf, Devon, England, UK, July

Ross Hoddinott / Apple tree (Malus domestica) blossom in orchard in spring, Broxwater, Cornwall, UK. April.

Ross Hoddinott / Apple tree (Malus domestica) blossom in orchard in spring, Broxwater, Cornwall, UK. April.

Nick Upton / Blue tit (Parus caeruleus) perched on a Crab apple (Malus sylvestris) tree branch in a garden, fluffing up its feathers to keep warm late in the day, Wiltshire, UK, March.

Nick Upton / Long-tailed tit (Aegithalos caudatus) perched in a Crab apple (Malus sylvestris) tree in a garden, Wiltshire, UK, March.

Nigel Cattlin / Common wasps (Vespula vulgaris) feeding through a hole in the skin on a ripe red discovery apple on the tree, Berkshire, England, UK, August

Nigel Cattlin / Common wasps (Vespula vulgaris) feeding through a hole in the skin on a ripe red discovery apple on the tree, Berkshire, England, UK, August

Nigel Cattlin / Ripe discovery apple eaten from the inside by wasps (Vespula vulgaris) and earwigs (Forficula sp.) Berkshire, England, UK, August leaving mummified skin on the tree.

Nigel Cattlin / Young green Apple (Malus domestica) flower and leaf cluster in spring, Berkshire, England, UK, April

Nigel Cattlin / White spotted slender leaf blotch miner (Callisto denticulella) caterpillar exposed from a mine in an apple leaf