Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Datasheet

Juglans regia
(walnut)

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Datasheet

Juglans regia (walnut)

Summary

  • Last modified
  • 22 November 2019
  • Datasheet Type(s)
  • Host Plant
  • Preferred Scientific Name
  • Juglans regia
  • Preferred Common Name
  • walnut
  • Taxonomic Tree
  • Domain: Eukaryota
  •   Kingdom: Plantae
  •     Phylum: Spermatophyta
  •       Subphylum: Angiospermae
  •         Class: Dicotyledonae
  • Uses List
  • Agroforestry
  • Fodder/animal feed
  • Nuts
  • Ornamental
  • Revegetation

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Pictures

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PictureTitleCaptionCopyright
Four-year-old J. regia tree in a plantation for wood production. Height 3m, d.b.h. 3 cm; location Casalmaggiore (CR), Po Valley, N. Italy.
TitleFour-year-old walnut tree
CaptionFour-year-old J. regia tree in a plantation for wood production. Height 3m, d.b.h. 3 cm; location Casalmaggiore (CR), Po Valley, N. Italy.
CopyrightBuresti
Four-year-old J. regia tree in a plantation for wood production. Height 3m, d.b.h. 3 cm; location Casalmaggiore (CR), Po Valley, N. Italy.
Four-year-old walnut treeFour-year-old J. regia tree in a plantation for wood production. Height 3m, d.b.h. 3 cm; location Casalmaggiore (CR), Po Valley, N. Italy.Buresti
TitleWalnuts
Caption
Copyright©Oregon State University, Dept of Nutrition & Food Management
Walnuts©Oregon State University, Dept of Nutrition & Food Management
TitleWalnuts
Caption
Copyright©Oregon State University, Dept of Nutrition & Food Management
Walnuts©Oregon State University, Dept of Nutrition & Food Management
A 23-year-old J. regia tree in a monospecific plantation for high-quality wood production. Height 14 m, d.b.h. 35 cm. Location: Casalmaggiore (CR), Po Valley, N. Italy.
TitleWinter, 23-year-old walnut tree
CaptionA 23-year-old J. regia tree in a monospecific plantation for high-quality wood production. Height 14 m, d.b.h. 35 cm. Location: Casalmaggiore (CR), Po Valley, N. Italy.
CopyrightBuresti
A 23-year-old J. regia tree in a monospecific plantation for high-quality wood production. Height 14 m, d.b.h. 35 cm. Location: Casalmaggiore (CR), Po Valley, N. Italy.
Winter, 23-year-old walnut treeA 23-year-old J. regia tree in a monospecific plantation for high-quality wood production. Height 14 m, d.b.h. 35 cm. Location: Casalmaggiore (CR), Po Valley, N. Italy.Buresti
A row of 10-year-old J. regia trees planted within agricultural land. Height 10 m, d.b.h. 15 cm. Located at Casalmaggiore (CR), Po Valley, N. Italy.
TitleWalnut in agroforestry system
CaptionA row of 10-year-old J. regia trees planted within agricultural land. Height 10 m, d.b.h. 15 cm. Located at Casalmaggiore (CR), Po Valley, N. Italy.
CopyrightBuresti
A row of 10-year-old J. regia trees planted within agricultural land. Height 10 m, d.b.h. 15 cm. Located at Casalmaggiore (CR), Po Valley, N. Italy.
Walnut in agroforestry systemA row of 10-year-old J. regia trees planted within agricultural land. Height 10 m, d.b.h. 15 cm. Located at Casalmaggiore (CR), Po Valley, N. Italy.Buresti
One-year-old J. regia plant
TitleWalnut seedling
CaptionOne-year-old J. regia plant
CopyrightBuresti
One-year-old J. regia plant
Walnut seedlingOne-year-old J. regia plantBuresti
Twig and leaves of J. regia
TitleWalnut foliage
CaptionTwig and leaves of J. regia
CopyrightBuresti
Twig and leaves of J. regia
Walnut foliageTwig and leaves of J. regiaBuresti
TitleWalnut fruit
Caption
CopyrightL.J. Grauke
Walnut fruitL.J. Grauke
A 50-year-old walnut tree, planted in a row in a forest stand. Height 27m high, d.b.h. 53 cm; clear bole is 6 m in length. Located at Garfagnana, Tuscany, central Italy.
TitleMature J. regia tree in forest
CaptionA 50-year-old walnut tree, planted in a row in a forest stand. Height 27m high, d.b.h. 53 cm; clear bole is 6 m in length. Located at Garfagnana, Tuscany, central Italy.
CopyrightBuresti
A 50-year-old walnut tree, planted in a row in a forest stand. Height 27m high, d.b.h. 53 cm; clear bole is 6 m in length. Located at Garfagnana, Tuscany, central Italy.
Mature J. regia tree in forestA 50-year-old walnut tree, planted in a row in a forest stand. Height 27m high, d.b.h. 53 cm; clear bole is 6 m in length. Located at Garfagnana, Tuscany, central Italy.Buresti
TitleWalnut fruit
Caption
CopyrightL.J. Grauke
Walnut fruitL.J. Grauke

Identity

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Preferred Scientific Name

  • Juglans regia L.

Preferred Common Name

  • walnut

Variety

  • Juglans regia var. adspersa var. Krussman (1986)
  • Juglans regia var. bartheriana Krussman (1986)
  • Juglans regia var. corcyrensis Krussman (1986)
  • Juglans regia var. praepaturiens Krussman (1986)
  • Juglans regia var. purpurea Krussman (1986)
  • Juglans regia var. racemosa Krussman (1986)
  • Juglans regia var. rubra Krussman (1986)

Other Scientific Names

  • Juglans duclouxiana Dode
  • Juglans fallax Dode
  • Juglans kamaonica (C. DC.) Dode
  • Juglans orientis Dode
  • Juglans sinensis (C. DC.) Dode

International Common Names

  • English: Carpathian walnut; Circassian walnut; common walnut tree; English walnut; European walnut; Madeira walnut; Persian walnut
  • Spanish: nogal; nogal común; nogal de Castilla; nogal inglés; nuez
  • French: noyer; noyer commun
  • Chinese: hetao shu
  • Portuguese: nogueira; nogueira-comum; noz

Local Common Names

  • Czechoslovakia (former): oresak vlassky
  • Denmark: valnød
  • Germany: Echter Walnussbaum; Europaische Walnuss; Walnuss; Walnussbaum
  • Greece: karydia
  • Hungary: dió
  • Italy: noce; noce commune; noce comune; noghera; nos; nus
  • Mexico: nogal; nuez
  • Netherlands: gewone walnoot; okkernoot; walnoot
  • Romania: nuc
  • Serbia: orech
  • Sweden: valnoettraed
  • USA: English walnut; Persian walnut

EPPO code

  • IUGRE (Juglans regia)

Taxonomic Tree

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  • Domain: Eukaryota
  •     Kingdom: Plantae
  •         Phylum: Spermatophyta
  •             Subphylum: Angiospermae
  •                 Class: Dicotyledonae
  •                     Order: Juglandales
  •                         Family: Juglandaceae
  •                             Genus: Juglans
  •                                 Species: Juglans regia

List of Pests

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Major host of:

Aceria erineus; Acrobasis nuxvorella (pecan nut casebearer); Aeolesthes sarta (city longhorn beetle); Amyelois transitella (navel orange worm); Armillaria mellea (armillaria root rot); Brenneria nigrifluens (shallow bark canker); Brenneria rubrifaciens (deep bark canker of walnut); Brevipalpus lewisi (citrus flat mite); Cherry leaf roll virus (walnut ringspot); Chromaphis juglandicola (walnut aphid, European); Cossus cossus (carpenter moth); Criconemella (ring nematode); Criconemella xenoplax (ring nematode); Cydia pomonella (codling moth); Epidiaspis leperii (European pear scale); Erschoviella musculana (Asian walnut moth); Fomes fomentarius (hoof fungus); Inonotus hispidus (shaggy bracket); Lepidosaphes ulmi (oystershell scale); Lymantria obfuscata (Indian gypsy moth); Nattrassia mangiferae (branch wilt of apple); Ophiognomonia leptostyla (walnut anthracnose); Paratrichodorus porosus; Phomopsis juglandina; Phymatotrichopsis omnivora (cotton root rot); Phytophthora cryptogea (tomato foot rot); Phytophthora megasperma (root rot); Pratylenchus vulnus (walnut root lesion nematode); Pseudococcus calceolariae (scarlet mealybug); Pseudomonas syringae pv. syringae (bacterial canker or blast (stone and pome fruits)); Rhagoletis completa (walnut husk fly); Saturnia pyri (giant emperor moth); Sirococcus clavigignenti-juglandacearum (butternut canker); Tremex fuscicornis (Tremex wasp); Trichodorus (stubby root nematodes); Xanthomonas arboricola pv. juglandis (walnut blight); Xiphinema americanum (dagger nematode); Xylosandrus germanus (black timber bark beetle); Xylotrechus namanganensis (namangan longhorn beetle); Zeuzera coffeae (coffee carpenter); Zeuzera pyrina (wood leopard moth)

Minor host of:

Anastrepha fraterculus (South American fruit fly); Aonidiella aurantii (red scale); Aphis spiraecola (Spirea aphid); Archips fuscocupreanus; Aromia bungii (red necked longicorn); Aspergillus niger (black mould of onion); Bactrocera tryoni (Queensland fruit fly); Botryosphaeria parva; Cadra cautella (dried currant moth); Caloptilia roscipennella (walnut leaf miner); Ceratitis capitata (Mediterranean fruit fly); Characoma ruficirra; Colletotrichum fioriniae; Coptodisca; Coptodisca lucifluella; Cydia latiferreana (filbertworm); Cydia splendana (chestnut tortrix moth); Diplodia seriata (grapevine trunk disease); Eulecanium tiliae (nut scale); Eutypa lata (Eutypa dieback); Fusarium incarnatum; Fusarium pallidoroseum (fungal gummosis (of Leucaena)); Fusicoccum amygdali; Geosmithia morbida (thousand cankers disease); Haematonectria haematococca (dry rot of potato); Helianthus ciliaris (Texas blueweed); Hyphantria cunea (mulberry moth); Malacosoma parallela (mountain ring silk moth); Neofusicoccum mediterraneam; Orgyia leucostigma (white-marked tussock moth); Pantoea agglomerans (bacterial grapevine blight); Pantomorus cervinus (Fuller's rose beetle); Parthenolecanium corni (European fruit lecanium); Phlyctinus callosus (vine calandra); Phytophthora cinnamomi (Phytophthora dieback); Phytophthora citrophthora (brown rot of citrus fruit); Phytophthora gonapodyides; Plagionotus arcuatus; Platynota stultana (omnivorous leaf roller); Plum pox virus (sharka); Polygonum aviculare (prostrate knotweed); Pratylenchus thornei; Pseudaulacaspis pentagona (mulberry scale); Pseudococcus viburni (obscure mealybug); Pythium oligandrum (mycoparasite of Pythium spp.); Rhizobium radiobacter (crown gall); Rhizobium rhizogenes (gall); Rosellinia necatrix (dematophora root rot); Scolytus scolytus (large elm bark beetle); Tribolium castaneum (red flour beetle); Xiphinema index (fan-leaf virus nematode); Xyleborinus saxesenii (fruit-tree pinhole borer); Xyleborus dispar (pear blight beetle)

Wild host of:

Trirachys holosericeus (apple stem borer)

Host of (source - data mining):

Apomyelois ceratoniae (blunt-winged knot-horn); Callaphis juglandis (walnut aphid, dusky-veined); Calliteara horsfieldii; Cryptodiaporthe castanea; Curculio caryae (pecan weevil); Cydia caryana (hickory shuckworm); Cytospora juglandina; Datana integerrima (walnut caterpillar); Eriophyes tristriatus (walnut leaf gall mite); Euzophera bigella (fruit, pyralid); Gastrolina depressa; Grovesinia pyramidalis (zonate leaf spot of Indian jujube); Melanconis juglandis; Microstroma juglandis; Monema flavescens (oriental moth); Nectria cinnabarina (canker: apple); Neoclytus caprea (banded ash borer); Neonectria radicicola (black root of strawberry); Parasa consocia; Parthenolecanium persicae (peach scale); Phytophthora citricola (black hop root rot); Pityophthorus juglandis (walnut twig beetle); Retithrips syriacus (black vine thrips); Saperda scalaris

Uses List

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Animal feed, fodder, forage

  • Fodder/animal feed

Environmental

  • Agroforestry
  • Revegetation

General

  • Ornamental

Human food and beverage

  • Nuts
  • Oil/fat
  • Spices and culinary herbs

Materials

  • Carved material
  • Dye/tanning
  • Essential oils
  • Miscellaneous materials
  • Wood/timber

Medicinal, pharmaceutical

  • Source of medicine/pharmaceutical
  • Traditional/folklore

Wood Products

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Containers

  • Cases
  • Crates

Furniture

Sawn or hewn building timbers

  • Carpentry/joinery (exterior/interior)
  • Flooring
  • For light construction

Veneers

Wood-based materials

  • Improved wood
  • Laminated veneer lumber
  • Laminated wood

Woodware

  • Cutlery
  • Industrial and domestic woodware
  • Marquetry
  • Toys
  • Turnery
  • Wood carvings