Nigel Cattlin / Walnut (Juglans regia), developing leaves , necrotic with frost damage. Berkshire, England, UK. May.

Pascal Tordeux / Walnut tree (Juglans regia) in the middle of a wheat field, Viller Le Sec, Picardy, France. August

Stephen Dalton / Walnut tree (Juglans regia) in full summer leaf, Sussex, UK

Martin Gabriel / Walnut (Juglans regia) fruits, Bavaria, Germany, July

Eric Baccega / Harvest of Common walnuts (Juglans regia), Alsace, France, September.

Eric Baccega / Harvest of Common walnuts (Juglans regia), Alsace, France, September.

Eric Baccega / Harvest of Common walnuts (Juglans regia), Alsace, France, September.

Thomas Marent / English Black Walnut (Juglans regia) tree, Zug, Switzerland

Thomas Marent / English Black Walnut (Juglans regia) trees, Zug, Switzerland

Nigel Cattlin / Walnuts (Juglans regia) maturing green fruit on tree, Berkshire, UK. July.

Nigel Cattlin / Walnut leaf gall mite (Aceria erinea) white blisters of mites on the lower surface of a walnut tree (Juglans regia) leaf, Berkshire, England, UK, June

Nigel Cattlin / Walnut leaf gall mite (Aceria erinea) blisters on the upper surface of a walnut tree (Juglans regia) leaf, Berkshire, England, UK, June