Foodplant / gall
Aceria erinea causes gall of live leaf of Juglans regia
In Great Britain and/or Ireland:
Foodplant / pathogen
Armillaria mellea s.l. infects and damages Juglans regia
Foodplant / shot hole causer
epiphyllous, almost entirely immersed pycnidium of Ascochyta coelomycetous anamorph of Ascochyta juglandis causes shot holes on leaf of Juglans regia
Foodplant / saprobe
fruitbody of Auricularia auricula-judae is saprobic on wood of Juglans regia
Foodplant / sap sucker
Callaphis juglandis sucks sap of Juglans regia
Foodplant / saprobe
colony of Chalaropsis dematiaceous anamorph of Ceratocystis paradoxa is saprobic on husk of Juglans regia
Foodplant / sap sucker
Chromaphis juglandicola sucks sap of Juglans regia
Foodplant / saprobe
gregarious, covered, plurilocular, stroma of Cytospora coelomycetous anamorph of Cytospora juglandina is saprobic on dead twig of Juglans regia
Remarks: season: 5
Foodplant / saprobe
bracket of Daedaleopsis confragosa is saprobic on dead wood of Juglans regia
Other: minor host/prey
Foodplant / saprobe
covered pycnidium of Phomopsis coelomycetous anamorph of Diaporthe juglandina is saprobic on dead bark of Juglans regia
Remarks: season: 8
Foodplant / saprobe
immersed, erumpent, conical, surrounded by laciniae, verruciform, paucilocellate, 1-2mm broad stroma of Fusicoccum coelomycetous anamorph of Fusicoccum juglandinum is saprobic on twig of Juglans regia
Foodplant / parasite
fruitbody of Ganoderma applanatum parasitises live trunk of Juglans regia
Other: minor host/prey
Foodplant / parasite
fruitbody of Inonotus hispidus parasitises live trunk of Juglans regia
Other: major host/prey
Foodplant / saprobe
superficial pycnidium of Aposphaeria coelomycetous anamorph of Melanomma pulvis-pyrius is saprobic on dry, hard, decorticate branch wood of Juglans regia
Remarks: season: 9-5
Foodplant / spot causer
hypophyllous, pulvinate, erumpent acervulus of Microstroma coelomycetous anamorph of Microstroma juglandis causes spots on live leaf of Juglans regia
Remarks: season: 7
Foodplant / pathogen
Tubercularia anamorph of Nectria cinnabarina infects and damages branch of Juglans regia
Remarks: season: 1-12
Foodplant / saprobe
fruitbody of Perenniporia fraxinea is saprobic on live trunk (base) of Juglans regia
Other: minor host/prey
Foodplant / saprobe
fruitbody of Phanerochaete sordida is saprobic on dead, decayed wood of Juglans regia
Other: minor host/prey
Foodplant / saprobe
stalked, clustered basidiocarp of Phleogena faginea is saprobic on dead, fallen trunk of Juglans regia
Remarks: season: 10-2