| Scientific binomial | Synonym | Common name or symptom |
| A | ||
| Acremonium diospyri (Crand.) W. Grams | Cephalosporium diospyri Crand. | persimmon wilt |
| Actinopelte dryina (Sacc.) Hoehn. | Actinopelte leaf spot | |
| Aecidium aesculi Ell. et Kellelm. | leaf spot | |
| Agrobacterium tumefaciens | crown gall | |
| (E.F. Smith et Town.) Conn. | ||
| Alternaria tenuis Nees | Alternaria leaf and stem blight | |
| Alerodiscus amorphus (Pers.: Fr.) Rab. | canker | |
| Amphichaeta grevilleae Loos | silk-oak leaf spot | |
| Anthostoma oreodaphnes | foliage discoloration | |
| Apiosporium piniphilum Fckl. | sooty mold | |
| Apiosporina morbosa (Schw.) von Arx | Dibotyron morbosum Th. et Syd. | black knot |
| Arceuthobium abietinum Engelm. ex Munz | fir dwarf mistletoe | |
| Arceuthobium abietinum Engelm. ex Munz | red fir dwarf mistletoe | |
| f. sp. magnificae Hawksw. et Wiens. | ||
| Arceuthobium abietinum Engelm. ex Munz | white fir dwarf mistletoe | |
| f. sp. concoloris Hawksw. et Wiens. | ||
| Arceuthobium americanum Nutt. ex Engelm. | lodgepole pine dwarf mistletoe | |
| Arceuthobium californicum Hawksw. et Wiens | sugar pine dwarf mistletoe | |
| Arceuthobium campylopodium Engelm. | western dwarf mistletoe | |
| Arceuthobium cyanocarpum Coulter et Nelson | limber pine dwarf mistletoe | |
| Arceuthobium divaricatum Engelm. | pinyon dwarf mistletoe | |
| Arceuthobium douglasii Engelm. | Douglas-fir dwarf mistletoe | |
| Arceuthobium laricis (Piper) St. Johns | larch dwarf mistletoe | |
| Arceuthobium microcarpum (Engelm.) | western spruce dwarf mistletoe | |
| Hawkins et Wiens | ||
| Arceuthobium occidentale Engelm. | digger pine dwarf mistletoe | |
| Arceuthobium pusillum Pk. | eastern dwarf mistletoe | |
| Arceuthobium tsugense (Rosend.) G.N. Jones | hemlock dwarf mistletoe | |
| Arceuthobium vaginatum (Willd.) Presl subsp. | southwestern dwarf mistletoe | |
| cryptopodum (Engelm.) Hawksw. et Wiens | ||
| Arceuthobium vaginatum (Willd.) Presl subsp. | southwestern dwarf mistletoe | |
| vaginatum | ||
| Armillaria mellea (Vahl.: Fr.) Kumm. | Armillaria mellea (Vahl.: Fr.) Karst. | shoestring root rot |
| Armillaria ostoyae (Romagn.) Herink | root disease | |
| Ascochyta cornicola Sacc. | Ascochyta leaf blight | |
| Astraeus pteridis (Shear) Zeller | earth star | |
| Atropellis pinicola Zell. et Good. | Atropellis canker | |
| Atropellis piniphila (Weir) Lohm. et Cash | branch canker | |
| Atropellis tingens Lohm. et Cash | stem canker | |
| Aureobasidium pullulans (de B.) Arn. | Pullularia pullulans (de B.) Berkh. | hemlock seed mold |
| B | ||
| Bifusella linearis (Pk.) Hoehn | needle cast | |
| Bifusella saccata (Darker) Darker | needle cast | |
| Boletellus zelleri (Murr.) Sing. | mycorrhizal symbiont | |
| Botryodiplodia theobromae Pat. | Botryodiplodia canker | |
| Botryosphaeria dothidea (Moug.: Fr.) | madrone canker | |
| Ces. et deNot | ||
| Botryosphaeria ribis (Tode: Fr.) Gross et Dug. | canker & trunk lesion | |
| Botrytis cinerea Pers.: Fr. | Botrytis petal blight | |
| C | ||
| Calonectria crotalariae (Loos) Bell et Sobers | koa crown rot | |
| Calonectria thea Loos | koa shoot blight | |
| Capnodium pini Berk. et Curt. | sooty mold | |
| Cenangium furruginosum Fr. | Cenangium limb canker | |
| Cenococcum graniforme (Sow.) Ferd. et Winge | mycorrhizal symbiont | |
| Cephalosporium pallidium Verrall | wood stain fungus | |
| Ceratocytis ambrosia Bak. | Ceratocytis canker | |
| Ceratocytis cana (Muench) C. Mor. | Ceratocytis canker | |
| Ceratocytis coerulescens (Muench) Bak. | sapstreak | |
| Ceratocytis crassivaginata H.D. Griffin | Ceratocytis canker | |
| Ceratocytis fagacearum (Bretz) Hunt | oak wilt | |
| Ceratocytis fimbriata Ell. et Halst. | Ceratocytis canker | |
| Ceratocytis moniliformis (Hedg.) C. Mor. | Ceratocytis canker | |
| Ceratocytis piceae (Muench) Bak. | Ceratocytis canker | |
| Ceratocytis pluriannulata (Hedg.) C. Mor. | sapwood stain | |
| Ceratocytis serpens (Goid.) C. Mor. | Ceratocytis canker | |
| Ceratocytis tremul-aurea Davidson et Hinds | Ceratocytis canker | |
| Ceratocytis ulmi (Buism.) C. Mor. | Dutch elm disease | |
| Cercospora aesculina Ell. et Kellerm. | leaf spot | |
| Cercospora circumcissa Sacc. | leaf spot | |
| Cercospora cornicola Tr. et Earle | dogwood leaf spot | |
| Cercospora halstedii Ell. et Ev. | leaf blotch | |
| Cercospora maclurae Ell. et Ev. | leaf spot | |
| Cercospora microsora Sacc. | basswood leaf spot | |
| Cercospora pulvinula Cke. et Ell. | holly leaf spot | |
| Cercospora sequoiae Ell. et Ev. | foliage blight | |
| Cercospora spegazzinii Sacc. | leaf spot | |
| Cercosporella celtidis (Ell. et Kellerm.) J.J. Davis | leaf spot | |
| Cerotelium fici (Butl.) Arth. | leaf spot | |
| Ceuthocarpum conflictum (Cke.) Berl. | leaf spot | |
| Chlorogenus robiniae Holmes | witches' broom virus | |
| Chrysomyxa arctostaphyli Diet. | yellow witches' broom | |
| Chrysomyxa chiogenis Arth. | needle rust | |
| Chrysomyxa empetri Pers. | needle rust | |
| Chrysomyxa ilicina (Arth.) Arth. | holly rust | |
| Chrysomyxa ledi de B. | needle rust | |
| Chrysomyxa ledicola Lagh. | spruce needle rust | |
| Chrysomyxa pirolata Wint. | spruce cone rust | |
| Chrysomyxa weirii Jacks. | needle rust | |
| Chrysomyxa woroninii Tranz. | bud rust | |
| Ciboria acerina Whetz. et Buchew. | maple flower blight | |
| Cladosporium effusum (Wint.) Dem. | pecan scab | |
| Cladosporium humile J.J. Davis | leaf spot | |
| Climacocystis borealis (Fr.) Kotl. et Pouz. | Polyporus borealis Fr. | heart rot |
| Climacodon septentrionalis (Fr.) Karst. | Hydnum septentrionalis Fr. | white heart rot |
| Clitocybe tabescens (Scop.: Fr.) Bres. | Armillaria tabescens (Scop.: Fr.) Bres. | mushroom root rot |
| Coccomyces hiemalis Higg. | cherry leaf spot | |
| Coccomyces lutescens Higg. | cherry leaf spot | |
| Coleosporium asterum (Diet.) Syd. | Coleosporium solidaginis (Schw.) Thum. | needle rust |
| Coleosporium campanulae (Pers.) Lev. | needle rust | |
| Coleosporium crowellii Cumm. | needle rust | |
| Coleosporium helianthi (Schw.) Arth. | needle rust | |
| Coleosporium jonesii (Pk.) Arth. | needle rust | |
| Coleosporium madiae Cke. | tarweed rust | |
| Colletotrichum gloeosporioides Penz. | leaf spot | |
| Collybia velutipes (Fr.) Kumm. | Flammulina velutipes (Fr.) Karst. | heart rot |
| Coniophora corrugis Burt | sapwood and heartwood rot | |
| Coniophora olivacea (Fr.) Karst. | Coniophorella olivacea (Fr.) Karst. | root and butt rot |
| Coniophora puteana (Schum.: Fr.) Karst. | Coniophorella puteana Schum.: Fr. | root and butt rot |
| Conophilis americana (L.) Wallr. | Coniophora cerebella (Pers.) Pers. | root rot, squaw root |
| Conothyrium truncisedum Vestergr. | leaf spot | |
| Coprinus atramentarius (Bull: Fr.) Fr. | root rot | |
| Corticium expallense Bres. | Phlebia expallense (Bres.) Parm. | decay fungus |
| Corticium salmonicolor Berk. et Br. | Phanerochaete salmonicolor (Berk. et | dieback |
| Br.) Jülich | ||
| Corynebacterium ilicis Mandel, Guba et Litsky | leaf and twig blight | |
| Coryneum carpophyllum (Lev.) Jauch. | leaf spot | |
| Criconemoides quadricornis (Kirhanova) Raski | ring nematode | |
| Cristulariella depraedens (Cke.) Hoehn. | leaf spot | |
| Cristulariella pyramidalis Wat. et Marsh. | target leaf spot | |
| Cronartium coleosporioides (Diet. et Holw.) Arth. | pine stem rust | |
| Cronartium comandrae Pk. | Comandra blister rust | |
| Cronartium comptoniae Arth. | sweetfern rust | |
| Cronartium occidentale Hedgc., Bethel et Hunt | pinyon blister rust | |
| Cronartium quercuum (Berk.) Miy. ex Shirai | Cronartium fusiforme Hedgc. et Hunt | fusiform rust |
| f. sp. fusiforme Burds. et Snow | ||
| Cronartium quercuum (Berk.) Miy. ex Shirai | Cronartium quercuum (Berk.) Miy. ex | eastern gall rust |
| Shirai f. sp. quercuum | ||
| Cronartium ribicola Fischer | white pine blister rust | |
| Cryphonectria cubensis (Bruner) Hodges | Diaporthe cubensis Bruner | eucalyptus canker |
| Cryphonectria parasitica (Murr.) Barr | Endothia parasitica (Murr.) | chestnut blight |
| P.J. et H.W. And. | ||
| Cryptoshpaeria populina (Pers.: Fr.) Sacc. | Cryptosphaeria canker | |
| Cryptosporium pinicola Lind. | stem and branch canker | |
| Cryptostroma corticale (Ell. et Ev.) Greg. et Wall. | sooty bark | |
| Cucurbitaria staphula Dearn. ex Arnold et Russell | rough, corky bark | |
| Cylindrocarpon cylindroides Wollenw. | stem and branch canker | |
| Cylindrocladium floridanum Sob. et Seymour | Cylindrocladium root rot | |
| Cylindrocladium scoparium Morg. | Cylindrocladium root rot | |
| Cylindrosporium californicum Earle | leaf spot | |
| Cylindrosporium defoliatum Heald et Wolf | leaf spot | |
| Cylindrosporium juglandis Wolf | leaf spot | |
| Cylindrosporium fraxini (Ell. et Kellerm.) Ell. et Ev. | leaf spot | |
| Cytophoma pruinosa (Fr.) Hoehn. | ash canker | |
| Cytospora abietis Sacc. | stem and branch canker | |
| Cytospora ambiens Sacc. | twig fungus | |
| Cytospora chrysosperma Pers.: Fr. | Cytospora canker | |
| Cytospora leucostoma Sacc. | canker | |
| Cytospora tumulosa Ell. et Ev. | branch saprophyte | |
| Cytosporina ludibunda Sacc. | elm wilt and dieback | |
| D | ||
| Daedalea ambigua Berk. | Daedalea elegans Spring.: Fr. | heart rot |
| Daedalea juniperina Murr. | Antrodia juniperina (Man.) Niem et Ryv. | heart rot |
| Daedalea quercina L.: Fr. | heart rot | |
| Daedalea unicolor (Bull.: Fr.) Murr. | Cerrena unicolor (Bull.: Fr.) Murr. | canker rot |
| Dasyscypha agassizii (Berk. et Curt.) Sacc. | saprophyte on bark | |
| Dasyscypha arida (Philli.) Sacc. | saprophyte on bark | |
| Dasyscypha pini Hahn et Ayers | saprophyte on bark | |
| Dasyscypha willkommii (Hart.) Rehm | European larch canker | |
| Davisomycella ampla (Dav.) Darke | needle cast | |
| Diaporthe alleghaniensis R.H. Arnold | black sunken canker and shoot blight | |
| Dichomitus squalens (Karst.) Reid | Polyporus anceps Pk. | western root rot |
| Didymascella tetramicrospora Pant. et Darker | leaf blight | |
| Didymascella thujina (Durand) Maine | seedling and foliage blight | |
| Didymosphaeria oregonensis Good. | alder stem and branch canker | |
| Dimerium juniperi Dearn. | smudge mold | |
| Dimerosporium tsugae Dearn. | sooty mold of hemlock | |
| Diplodia longispora Cke. et Ell. | twig blight | |
| Diplodia pinea (Desm.) Kickx | Sphaeropsis sapinea (Fr.: Fr.) | Diplodia tip blight |
| Dyko et Sutton | ||
| Diplodia taxi (Sowerby) deNot | stem canker | |
| Diplodia tumefaciens (Shear) Zalasky | rough, corky bark | |
| Discula quercina (Westd.) v. Arx | anthracnose | |
| Dothichiza populea Sacc. et Briard. | Dothichiza canker | |
| Dothiorella quercina (Cke. et Ell.) Sacc. | Dothiorella canker | |
| Dothiorella ulmi Verr. et May | elm dieback | |
| Dothistroma pini Hulb. | Dothistroma needle blight | |
| E | ||
| Echinodontium taxodii (Lentz et McKay) Gross | Stereum taxodii Lentz et McKay | pecky cypress pocket rot |
| Echinodontium tinctorium (Ell. et Ev.) Ell. et Ev. | Indian paint fungus | |
| Elaphomyces granulatus Fr. | mycorrhizal symbiont | |
| Elsinoe corni Jenk. et Bitan. | dogwood leaf spot | |
| Elsinoe quercus-falcatae J. Mill. | spot anthracnose | |
| Elsinoe randii Jenk. et Bitan | pecan spot anthracnose | |
| Eltyroderma deformans (Weir) Darker | needle cast | |
| Encoeliopsis laricina (Ettl.) Groves | larch shoot blight | |
| Endocronartium harknessii (J.P. Moore) Y. Hirat | Peridermium harknessii J.P. Moore | western gall rust |
| Endoraceium acaciae C.S. Hodges et D.E. Gardner | rust fungus | |
| Endoraceium hawaiiense C.S. Hodges et | rust fungus | |
| D.E. Gardner | ||
| Endothia gyrosa (Schw.: Fr.) Fr. | pin oak blight | |
| Endothia havaensis Bruner | Cryphonectria havanensis (Bruner) Barr | canker disease |
| Epifagus virginiana (L.) Bart. | beech drops | |
| Erwinia nimipressuralis Cart. | elm wetwood | |
| Erysiphe cichoracearum DC. | powdery mildew | |
| Eutypella parasitica Davidson et Lorenz | Eutypella canker | |
| F | ||
| Fabrella tsugae (Farl.) Kirschst. | Didymascella tsugae (Farl.) Maire | hemlock needle blight |
| Fomes fomentarius (L.: Fr.) Kickx. | trunk rot | |
| Fomes geotropus Cke. | heart rot | |
| Fomes nobilissimus (Cke.) Lowe | trunk rot | |
| Fomes sclerodermeus (Lev.) Cke. | Fomes marmoratus (Berk. et Curt.) Cke. | white heart rot |
| Fomes subroseus Weir | Fomitopsis cajanden (Karst.) Kotl. et | heart rot |
| Pouz.; Fomes cajanderi Karst. | ||
| Fomitopsis cajanderi (Karst.) Kotl. et Pouz. | Fomes subroseus Weir; | heart rot |
| Fomes cajanderi Karst. | ||
| Fomitopsis fraxineus (Bull.: Fr.) | Fomes fraxineus (Bull.: Fr.) Cke. | wood rot |
| Fomitopsis officinalis (Vill.: Fr.) Bond. et Singer | Fomes officinalis (Vill.: Fr.) Faull | quinine fungus |
| Fomitopsis pinicola (Schwartz: Fr.) Karst. | Fomes pinicola (Schwartz: Fr.) Cke. | red belt fungus |
| Fomitopsis roseus (Alb. et Schw.: Fr.) Karst. | Fomes roseus (Alb. et Schw.: Fr.) Karst. | heart rot |
| Fomitopsis scutellata (Schw.) Bond. et Sing. | Fomes scutellatus (Schw.) Cke. | wood rot |
| Fumago vagans Fr. | black mold | |
| Fusarium oxysporum (Schl.) emend. Snyd. et Hans. | pecan feeder root necrosis | |
| Fusarium reticulatum Mont. var. negundinis | Fusarium roseum (Lk.) emend. | red stain of boxelder |
| (Sherb.) Wr. | Snyd. et Hans. | |
| Fusarium solani (Mart.) App. et Wr. emend. | pecan feeder root necrosis | |
| Snyd. et Hans. | ||
| Fusicoccum aesculi Corda in Sturm | madrone canker | |
| G | ||
| Ganoderma applanatum (Pers.: Wallr.) Pat. | Fomes applanatus (Pers.: Wallr.) Gill | artist's conk |
| Ganoderma curtisii (Berk.) Murr. | Polyporus curtisii Berk. | root rot |
| Ganoderma lucidum (Leys. ex Fr.) Karst. | varnish or laquer conk | |
| Ganoderma tsugae Murr. | Polyporus tsugae (Murr.) Overh. | red varnish-top fungus |
| Gloeocystidiellum citrinum (Pers.) Donk | Corticium radiosum (Fr.: Pers.) Fr. | root and butt rot |
| Gloeocystidiellum radiosum | root and butt rot | |
| Gloeosporium apocryptum Ell. et Ev. | anthracnose | |
| Gloeosporium aridum Ell. et Holway | ash anthracnose | |
| Gloeosporium betularum Ell. et Mart. | anthracnose leaf blight | |
| Gloeosporium saccharinum Ell. et Ev. | anthracnose | |
| Gloeosporium ulmicolum Miles | leaf spot and twig blight | |
| Glomus fasciculatus (Thaxter) Gerd. et Trappe | endomycorrhizal associate | |
| Glomus mosseae (Nicol. et Gerd.) Gerd. et Trappe | endomycorrhizal associate | |
| Gnomonia caryae Wolf | anthracnose | |
| Gnomonia caryae var. pecanae Cole | pecan liver spot | |
| Gnomonia leptostyla (Fr.) Ces. et deNot | walnut anthracnose | |
| Gnomonia nerviseda Cole | pecan vein spot | |
| Gnomonia quercina Kleb. | oak anthracnose | |
| Gnomonia satacea (Pers.: Fr.) Ces. et deNot | canker, shoot blight, leaf spot | |
| Gnomonia tiliae Kleb. | basswood anthracnose | |
| Gnomonia ulmea (Schw.: Fr.) Thuem. | black spot of elm | |
| Gnomonia veneta (Sacc. et Speg.) Kleb. | Gnomonia paltani Edg. | oak anthracnose |
| Gomphidius ochraceus Kauffm. | mycorrhizal symbiont | |
| Gomphidius rutilus (Schael.: Fr.) Lund & Nannf. | mycorrhizal symbiont | |
| Gomphidius superiorensis Kauf. et Smith | mycorrhizal symbiont | |
| Gomphidius vinicolor Pk. | mycorrhizal symbiont | |
| Gremmeniella abietina (Lagerb.) Morelet | Scleroderris lagerbergii Grem. | Scleroderris canker |
| Guignardia aesculi (Pk.) Stew. | leaf blotch | |
| Gymnopilus spectabilis (Fr.) Singer | Pholiota spectabilis (Fr.) Kumm. | trunk rot |
| Gymnosporangium bethelii Kern | juniper twig knot rust | |
| Gymnosporangium biseptatum Ell. | stem and branch gall rust | |
| Gymnosporangium clavipes (Cke. et Pk.) Cke. et Pk. | gall rust | |
| Gymnosporangium effusum Kern | gall rust | |
| Gymnosporangium ellisii (Berk.) Farlow | witches' broom rust | |
| Gymnosporangium globosum Farlow | juniper branch gall rust | |
| Gymnosporangium inconspicuum Kern | juniper witches' broom rust | |
| Gymnosporangium juniperi-virginianae Schw. | cedar applerust | |
| Gymnosporangium kernianum Bethel | brown rust | |
| Gymnosporangium libocedri (P. Henn.) Kern | witches' broom rust | |
| Gymnosporangium nelsonii Arth. | juniper stem gall rust | |
| Gymnosporangium nidus-avis Thaxt. | juniper witches' broom rust | |
| H | ||
| Haematostereum sanguinolentum (Alb. et | Stereum sanguinolentum (Alb. et | red heart trunk rot |
| Schw.: Fr.) Pouz. | Schw.: Fr.) Fr. | |
| Helicobasidium purpureum (Tul.) Pat. | violet root rot | |
| Hendersonula toruloidea Natt. | branch wilt and canker | |
| Hericium coralloides (Scop.: Fr.) S.F. Gray | Hydnum coralloides Scop.: Fr. | trunk rot |
| Hericium erinaceum (Bull.: Fr.) Pers. | Hydnum erinaceus Bull.: Fr. | magnolia leaf spot |
| Herpotrichia nigra Hartig | Herpotrichia juniperi (Duby) Petrak | brown felt mold |
| Heterobasidion annosum (Fr.) Bref. | Fomes annosus (Fr.) Cke. | annosus root rot |
| Hirschioporus abietinus (Dicks.: Fr.) Donk | Polyporus abietinus Dicks.: Fr. | wood rot |
| Hydnum erinaceus Bull.: Fr. | Hericium erinaceum (Bull.: Fr.) Pers. | hedgehog fungus |
| Hymenochaete agglutinans Ell. | gluing fungus | |
| Hypoderma hedgcokii Dearn. | Ploioderma hedgcokii (Dearn.) Darker | needle cast |
| Hypoderma lethale Dearn. | Ploioderma lethale (Dearn.) Darker | needle cast |
| Hypodermella laricis Tub. | larch needle csat | |
| Hypoxylon mammatum (Wahl.) J. Miller | Hypoxylon pruinatum (Klot.) Cke.; | Hypoxylon canker |
| H. blakei Berk. et Curt. | ||
| Hysterographium fraxini (Pers.: Fr.) deNot | twig saprophyte | |
| I | ||
| Inonotus andersonii (Ell. et Overh.) Cérny | Poria andersonii (Ell. et Ev.) Cérny | white pocket rot |
| Inonotus dryadeus (Pers.: Fr.) Murr. | Polyporus dryadeus Pers.: Fr. | white wood rot |
| Inonotus dryophilus (Berk.) Murr. | Polyporus dryophilus Berk. | white pocket rot |
| Inonotus glomeratus (Pk.) Murr. | Polyporus glomeratus Pk. | wood rot |
| Inonotus obliquus (Pers.: Fr.) Pilat | Poria obliqua (Pers.: Fr.) Karst | heart rot |
| Inonotus rheades | (Peniophora polygonia, americanum, | trunk rot |
| rufa) | ||
| Inonotus tomentosus (Fr.) Gilbertson | Polyporus tomentosus Fr. | heart rot |
| K | ||
| Kabatiella phoradendri Darker f. sp. | leaf spot | |
| umbellulariae Harv. | ||
| Keithia chamaecyparissi Adams | Didymascella chamaecyparissi (Adams) | tip blight |
| Maire | ||
| L | ||
| Lachnellula occidentalis (Hahn et Ayers) Dharne | stem canker | |
| Lachnellula suecica (de Bary ex Fuckel) Nannf. | stem canker | |
| Laetiporus sulphureus (Bull.: Fr.) Bond et Singer | Polyporus sulphureus Bull.: Fr. | sulphur fungus |
| Lecanosticta acicola Theum. et Snyd. | brown spot | |
| Lentinus tigrinus Fr. | heart rot | |
| Leucocytospora kunzei (Sacc.) Z. Urba | (Cytopspora kunzei Sacc.) | branch canker |
| Linospora gleditsiae J. Miller et Wolf | tarry leaf spot | |
| Lirula abietis-concoloris (Mayr ex Dearn.) Darker | needle cast | |
| Lirula macrospora (Hartig) Darker | Lophodermium filiforme Darker | needle cast |
| Lirula punctata (Darker) Darker | needle cast | |
| Lophodermella arcuata (Darker) Darker | needle cast | |
| Lophodermella concolor (Darker) Darker | needle cast | |
| Lophodermium autumnale Darker | needle cast | |
| Lophodermium juniperinum (Fr.) deNot. | foliag necrosis | |
| Lophodermium laricinum Duby | needle cast | |
| Lophodermium nitens Darker | needle cast | |
| Lophodermium piceae (Fckl.) Hoehn. | needle cast | |
| Lophodermium pinastri (Schrad.) Chev. | needle cast | |
| Lophodermium seditiosum Minter, Staley, et Millar | needle cast | |
| Lophodermium uncinatum Darker | needle cast | |
| Lophophacidium hyperboreum Lagerb. | snow blight | |
| M | ||
| Macrophoma taxi Berl. et Vogl. | yellow needle blight | |
| Macrophomina phaseoli (Maub.) Ashby | charcoal root rot | |
| Marssonina brunnea (Ell. et Ev.) Sacc. | Marssonina leaf spot | |
| Marssonina fraxini Niessl | leaf spot | |
| Marssonina populi (Lib.) Magn. | leaf spot, shoot blight | |
| Melampsora abietis-canadensis (Farlow) Ludw. | hemlock needle rust | |
| Melampsora farlowii (Arth.) Davis | hemlock cone and shoot rust | |
| Melampsora medusae Theum. | Melampsora leaf spot | |
| Melampsorella caryophyllacearum Schroet. | fir broom rust | |
| Melanconis juglandis (Ell. et Ev.) Graves | twig and branch dieback | |
| Meliola koae Stevens | koa sooty mold | |
| Meloidogyne incognita (Kof. et White) Chitw. | root knot | |
| Meloidogyne ovalis Riffle | ash root knot nematode | |
| Microsphaera alni DC. | powdery mildew | |
| Microstroma juglandis (Berang.) Sacc. | white mold | |
| Morsus ulmi Holmes | elm phloem necrosis | |
| Mycosphaerella caryigena Dem. et Cole | downy spot | |
| Mycosphaerella cercidicola (Ell. et Kellerm.) Wolf | redbud anthracnose | |
| Mycosphaerella dendroides (Cke.) Dem. et Cole | leaf blotch | |
| Mycosphaerella effigurata (Schw.) House | ash leaf spot | |
| Mycosphaerella fraxinicola (Schw.) House | ash leaf spot | |
| Mycosphaerella glauca (Cke.) Woronichin | leaf spot and twig blight | |
| Mycosphaerella juglandis Kessler | leaf spot | |
| Mycosphaerella maculiformis (Pers.: Fr.) Schroet. | leaf spot | |
| Mycosphaerella milleri Hodges et Haasis | Cercospora magnoliae Ell. et Hark. | angular leaf spot |
| (Imperfect state) | ||
| Mycosphaerella mori Wolf | leaf spot | |
| Mycosphaerella nyssaecola (Cke.) wolf | leaf spot | |
| Mycosphaerella sassafras (Ell. et Ev.) Bub. et Kab. | sassafras leaf spot | |
| Mycosphaerella taxi (Cooke) Lind | needle blight | |
| Myxosporium nitidum Berk. et Curt. | twig blight | |
| N | ||
| Naemacyclus minor Butin | needle cast | |
| Nectria cinnabarina Tode.: Fr. | branch dieback | |
| Nectria coccinea Pers.: Fr. var. faginata Lohm., | beech canker | |
| Wats. et Ay. | ||
| Nectria galligena Bres. | Nectria canker | |
| Nectria magnoliae Lohm. et Hept. | magnolia canker | |
| Nectria peziza (Tode.: Fr.) Fr. | Nectria umbellulariae (Plowr.) Harkn. | stem canker, dieback, needle cast |
| Neofabraea populi G.E. Thompson | canker | |
| Neopeckia coulteri (Pk.) Sacc. | pine brown-felt snow mold | |
| O | ||
| Ovularia maclurae Ell. et Langl. | Osage-orange leaf spot | |
| Oxyporus populinus (Sokum.: Fr.) Donk | Fomes connatus (Weinm.: Fr.) Gill. | heart rot |
| P | ||
| Paxillus involutus (Batch: Fr.) Fr. | brown root rot | |
| Pellicularia koleroga Cke. | Corticium stevensii Burt. | thread blight |
| Peniophora polygonia (Fr.) Bourd. et Galz. | Crytochaete polygonia (Pers.) Karst. | trunk rot |
| Peniophora pseudo-pini Weres. et Gibs. | red heartwood stain | |
| Peniophora rufa (Fr.) Boidin | trunk rot | |
| Peniophora septentrionalis Laur. | trunk rot | |
| Perenniporia compacta (Overh.) Ryv. et Gilbn. | white pocket rot | |
| Perenniporia fraxinea (Bull.: Fr.) Ryv. | Fomes fraxineus (Bull.: Fr.) Cke. | wood rot |
| Perenniporia fraxinophilus (Peck) Ryv. | Fomes fraxinophilus (Pk.) Cke. | ash heart rot |
| Peridermium cerebroides Meinecke | coastal gall rust | |
| Peridermium filamentosum Pk. | limb rust | |
| Peridermium harknessii J.P. Moore | Endocronartium harknessii (J.P. Moore) | western gall rust |
| Y. Hirat | ||
| Peridermium ornamentale Arth. | Pucciniastrum goeppertianum (Kuehn) | fir needle rust |
| Kleb | ||
| Peridermium rugosum H. Jackson | needle rust | |
| Peridermium stalactiforme Arth. et Kern | stalactiform rust | |
| Pezicula acericola (Pk.) Sacc. | leaf rust | |
| Pezicula subcarnea Groves | leaf spot or twig blight | |
| Phacidium curtissii (Berk. et Rav.) Luttr. | leaf spot | |
| Phacidium infestans Karst. | snow blight | |
| Phaeocryptopus gaeumanni (Rhode) Petr. | needle cast | |
| Phaeocrytpopus nudis Petr. | needle cast | |
| Phaeolus schweinitzii (Fr.) Pat. | Polyporus schweinitzii Fr. | red brown butt rot |
| Phellinus everhartii (Ell. et Gall) A. Ames | Fomes everhartii (Ell. et Gall) | heart rot |
| Schr. & Spauld. | ||
| Phellinus ferruginosus (Schrad.: Fr.) Pat. | Poria ferruginosa (Schrad.: Fr.) Karst. | white rot of slash |
| Phellinus igniarius (L.: Fr.) Quel. | Fomes igniarius (L.: Fr.) Kickx | false tender fungus |
| Phellinus johnsonianus (Murr.) Ryv. | Fomes densus Lloyd | heart rot |
| Phellinus laevigatus (Fr.) Bourd. et Galz. | Fomes igniarius laevigatus (Fr.) Overh. | heart rot |
| Phellinus nigrolimitatus (Rom.) Bourd. et Galz. | Fomes nigrolimitatus (Rom.) Egel. | root and butt rot |
| Phellinus pini (Thore.: Fr.) A. Ames | Fomes pini (Thore.: Fr.) Karst. | red ring rot |
| Phellinus pomaceus (Pers.) Maire | Fomes pomaceus (Pers.) Lloyd | trunk rot |
| Phellinus prunicola (Murr.) Gilbn. | Poria prunicola (Murr.) Sacc. et Trott | trunk rot |
| Phellinus punctatus (Fr.) Pilat | Poria punctata (Fr.) Karst. | white rot of slash |
| Phellinus ribis (Schum.: Fr.) Quel. | Fomes ribis (Schum.: Fr.) Gill. | white heart rot |
| Phellinus rimosus (Berk.) Pilat | Fomes rimosus (Berk.) Cke. | heart rot |
| Phellinus robustus (Karst.) Bourd. et Galz. | Fomes robustus Karst. | heart rot |
| Phellinus texanus (Morr.) A. Ames | Fomes texanus (Murr.) Hedgc. et Long | heart rot |
| Phellinus tremulae (Bond.) Bond et Boriss | Fomes igniarius (L.: Fr.) Kickx var. | false tinder fungus |
| populinus (Neum.) Campb. | ||
| Phellinus weiri (Murr.) Gilbn. | Poria weirii (Murr.) Murr. | laminated root rot |
| Phibalis pruinosa (Ell. et Ev.) Kohn et Korf | sooty-bark canker | |
| Phleospora celtidis Ell. & Morg. | leaf spot | |
| Phlyctaena tiliae Dearn. | leaf spot | |
| Pholiota alnicola (Fr.) Singer | Flammula alnicola (Fr.) Kumm. | root and butt rot |
| Pholiota aurivella (Batsch: Fr.) Kumm. | Pholiota adiposa (Fr.: Fr.) Kumm. | trunk rot |
| Pholiota destruens (Brond.) Gillet | heart rot | |
| Pholiota hepatica (Huds.: Fr.) Singer | Flammula alnicola (Huds.: Fr.) Kumm. | beefsteak fungus |
| Pholiota limonella (Pk.) Sacc. | Pholiota squarroso-adiposa Lange | heart rot |
| Pholiota squarrosa (Muller: Fr.) Kumm. | root and butt rot | |
| Phoma aposphaerioides Briard et Hariot | Phoma canker | |
| Phoma harknessii Sacc. | bark saprophyte | |
| Phoma hystrella Sacc. | yellow needle blight | |
| Phoma pedunculi Ell. et Ev. | leaf spot | |
| Phomopsis juniperovora Hahn | foliage blight | |
| Phomopsis macrospora Kobayi & Chiba | Phomopsis canker | |
| Phomopsis occulta Trav. | tip blight | |
| Phoradendron bolleanum (Seem.) Eich. subsp. | mistletoe | |
| densum (Torr.) Fosb. | ||
| Phoradendron bolleanum (Seem.) Eich. subsp. | white fir mistletoe | |
| pauciflorum (Torr.) Wiens | ||
| Phoradendron flavescens (Pursh) Nutt. | eastern mistletoe | |
| Phoradendron juniperinum Engelm. subsp. | mistletoe | |
| juniperinum Wiens | ||
| Phoradendron juniperinum Engelm. subsp. | incense-cedar mistletoe | |
| libocedri Wiens | ||
| Phoradendron longispicum Trel. | mistletoe | |
| Phoradendron serotinum (Raf.) M.C. Johnst. | eastern leafy mistletoe | |
| Phoradendron tomentosum (DC.) Gray | mistletoe | |
| Phoradendron villosum (Nutt.) Nutt. subsp. | western hairy mistletoe | |
| villosum Wiens | ||
| Phyllachora perseae Hodges | redbay leaf spot | |
| Phyllactinia corylea Pers. | powdery mildew | |
| Phyllactinia guttata (Fr.) Lev. | powdery mildew | |
| Phyllosticta celtidis Ell et Kell. | leaf spot | |
| Phyllosticta innumera Cke. et Harkn. | leaf spot | |
| Phyllosticta maclurae Ell. et Ev. | leaf spot | |
| Phyllosticta magnoliae Sacc. | magnolia leaf spot | |
| Phyllosticta minima (Berk. et Curt.) Ell. et Ev. | tar spot | |
| Phyllosticta opaca Ell. et Ev. | leaf spot | |
| Phymatotrichum paulowniae Sacc. | leaf spot | |
| Phymatotrichum omnivorum (Shear) Dugg. | Texas root rot | |
| Physalospora gregaria Sacc. | twig blight | |
| Physalospora ilicis (Schleich.: Fr.) Sacc. | leaf spot | |
| Phytophthora cactorum (Leb. et Cohn) Schr. | damping-off | |
| Phytophthora cinnamoni Rands | root rot | |
| Phytophthora citricola Sevada | root rot | |
| Phytophthora inflata Caros. et Tucker | elm canker | |
| Phytophthora lateralis Tucker et J.A. Milb. | root rot | |
| Piggotia fraxini Berk. et Curt. | leaf spot | |
| Piptoporus betulinus (Bull.: Fr.) Karst. | heart rot | |
| Pleurotus ostreatus (Jacq.: Fr.) Kumm. | oyster mushroom | |
| Pleurotus ulmarius (Bull.: Fr.) Kumm. | elm wood rot | |
| Ploioderma hedgcokii (Dearn.) Darker | Hypoderma hedgcokii Dearn. | needle cast |
| Podosphaera oxyacanthae DC. var. tridactyla Wallr. | cherry powdery mildew | |
| Pollaccia saliciperda (Allesch. et Tub.) v. Arx | willow blight | |
| Polyporus abietinus Dicks.: Fr. | Trichaptum abietinus (Dicks.: Fr.) Ryv. | trunk rot |
| Polyporus adustus Willd.: Fr. | Bjerkandera adusta (Willd.: Fr.) Karst. | sapwood decay |
| Polyporus berkeleyi Fr. | Bondarzewia berkeleyi (Fr.) | root rot |
| Bond et singer | ||
| Polyporus caesius Schrad.: Fr. | Postia caesia (Schrad.: Fr.) Karst. | heart rot |
| Polyporus calkinsii (Murr.) Sacc. et Trott. | heart rot | |
| Polyporus guttulatus Pk. | root rot | |
| Polyporus hispidus Bull.: Fr. | Inonotus hispidus (Bull. ex Fr.) Karst. | hispidus canker |
| Polyporus lucidus Leys.: Fr. | Ganoderma lucidum (Leys. ex Fr.) Karst | varnish or laquer conk |
| Polyporus obtusus Berk. | Spongipellis unicolor (Schw.) Murr. | heart rot |
| Polyporus robiniophilus (Murr.) Lloyd | Perenniporia robiniophila (Murr.) Ryv. | heart rot |
| Polyporus squamosus Mich.: Fr. | scaly or saddleback fungus | |
| Polyporus versicolor L.: Fr. | Coriolus versicolor (L.: Fr.) Quel. | sapwood decay |
| Poria albipellucida Baxt. | Poria rivulosa (Berk. et Curt.) Cke. | redwood ring rot |
| Poria asiatica (Pil.) Overh. | trunk rot | |
| Poria ferruginosa (Schrad.: Fr.) Karst. | Phellinus ferruginosus (Schrad.: Fr.) Pat. | white rot of slash |
| Poria incrassata (Berk. et Curt.) Burt | Serpula incrassata (Berk. et Curt.) Donk | heart rot |
| Poria mutans (Pk.) Pk. | heart rot | |
| Poria prunicola (Murr.) Sacc. et Trott. | Phellinus prunicola (Murr.) Gilbn. | trunk rot |
| Poria punctata (Fr.) Karst. | Phellinus punctatus (Fr.) Pilat | white rot of slash |
| Poria rimosa Murr. | Diptomitoporus rimosus (Murr.) | heart rot |
| Gilbn. et Ryv. | ||
| Poria sequoiae Bonar | redwood trunk rot | |
| Poria spiculsoa Campb. et Davids. | canker rot of hickory and pecan | |
| Poria subacida (Pk.) Sacc. | Perenniporia subacida (Pk.) Donk | white rot conk |
| Pratylenchus penetrans Cobb | root lesion nematode | |
| Pseudomonas lauracearum Harv. | leaf spot | |
| Pseudomonas mori (Boy. et Lamb.) Stev. | bacterial leaf spot | |
| Puccinia andropogonis Schw. | leaf rust | |
| Puccinia cordiae Arth. | canker producing rust | |
| Puccinia peridermiospora (Ell. et Tr.) Arth. | ash rust | |
| Pucciniastrum epilobii Otth. | needle rust | |
| Pucciniastrum goeppertianum (Keuhn) Kleb. | Peridermium ornamentale Arth. | needle rust |
| Pucciniastrum hydrangeae (Berk. et Curt.) Arth. | hemlock needle rust | |
| Pucciniastrum vaccinii (Wint.) Jorst. | hemlock needle rust | |
| Pyrofomes demidoffii (Lev.) Kotl. et Pouz. | Fomes juniperinus (Schrenk) | heart rot |
| Sacc. et Syd. | ||
| Pythium debaryanum Hesse | damping-off | |
| Pythium irregulare Buism. | damping-off and root rot | |
| Pythium ultimum Trow. | damping-off | |
| Pythium vexans de B. | root rot | |
| R | ||
| Radulodon americanum Ryv. | Radulodon caesearium (Morg.) Ryv. | trunk rot |
| Resinicium bicolor (Alb. & Schw.: Fr.) Parm. | Odontia bicolor (Alb. & Schw.) Bres. | white stringy rot |
| Retinocyclus abietis (Crouan) Graves et Wells | endophytic fungus | |
| Rhabdocline pseudotsugae Syd. | needle cast | |
| Rhizina undulata Fr. | root rot | |
| Rhizoctonia crocorum (Pers.) DC. Fr. | root rot | |
| Rhizoctonia solani Keuhn | damping-off | |
| Rhizosphaera kalkoffii Bud. | needle cast | |
| Rhytidiella baranyayi Funk et Zalasky | rough, corky bark | |
| Rhytidiella moriformis Zalasky | rough bark | |
| Rhytisma acerinum Pers.: Fr. | tar spot | |
| Rhytisma punctatum Pers.: Fr. | tar spot | |
| Roselinia herpotrichioides Hept. et Davidson | grey mold | |
| Russula delica Fr. | mycorrhizal symbiont | |
| Russula xerampelina (Schaef.) Fr. | mycorrhizal symbiont | |
| S | ||
| Sarcotrichila alpina (Fuckel) Hoehn. | needle blight | |
| Schizophyllum commune Fr. | sapwood rot | |
| Schizoxylon microsporum Davidson et Lor. | Schizoxylon canker | |
| Scirrhia acicola (Dearn.) Sigg. | brown spot | |
| Scirrhia pini Funk et A.K. Parker | red band needle blight | |
| Scleroderma hypogaeum Zeller | false puffball | |
| Sclerotina gracilipes (Cke.) Sacc. | sweetbay petal rot | |
| Scytinostroma galactinum (Fr.) Donk | Corticium galactinum (Fr.) Burt. | root and butt rot |
| Septobasidium burtii Lloyd | scale brown felt | |
| Septobasidium pseudopedicellatum Burt | scale brown felt | |
| Septogloeum celtidis Dearn. | leaf spot | |
| Septoria aceris (Lib.) Berk. et Br. | leaf blister | |
| Septoria angustissima Pk. | leaf spot | |
| Septoria cornicola Desm. | dogwood leaf spot | |
| Septoria musiva Pk. | septoria leaf spot | |
| Septoria populicola Pk. | leaf spot and canker | |
| Septoria quercicola (Desm.) Sacc. | oak leaf fungus | |
| Septotinia podophyllina Wat. | leaf blotch | |
| Serpula himantioides (Fr.) Karst. | Merulius himantioides Fr. | root and butt rot |
| Sirococcus clavigigneti-juglandacearum Nair, | butternut canker | |
| Kostichka, et Kuntz | ||
| Sirococcus strobilinus (Dearn.) Petr. | Sirococcus tip blight | |
| Sphaerella umbellulariae Cke. et Harkn. | foliage discoloration | |
| Sphaeropsis ulmicola Ell. et Ev. | elm canker | |
| Sphaerotheca lanestris Harkn. | oak powdery mildew | |
| Sphaerotheca phytophila Kellerm. et Swing. | powdery mildew | |
| Sphaerulina taxi (Cke.) Mass. | yellow leaf scorch | |
| Spongipellis delectans (Pk.) Murr. | Polyporus delectans Pk. | white rot of hardwoods |
| Spongipellis pachyodon (Pers.) Kotl. et Pouz. | Irpex mollis Berk. et Curt. | Irpex canker |
| Sporodesmium maclurae Thuem. | Osage-orange leaf spot | |
| Steccherinum septentrionale (Fr.) Banker | Hydnum septentrionale Fr. | trunk rot |
| Stereum chailletii Pers.: Fr. | Amylostereum chailletii (Pers.: Fr.) Boid. | trunk rot |
| Stereum gausaptum (Fr.) Fr. | white heart rot | |
| Stereum hirsutum (Willd.: Fr.) S.F. Gray | sapwood decay | |
| Stereum murraii (Berk. et Curt.) Burt | Cytostereum murraii (Berk. et Curt.) | trunk rot |
| Pouz. | ||
| Stereum sulcatum Burt | Echinodontium sulcatum (Burt) Gross | trunk rot |
| Strumella coryneoidea Sacc. et Wint. | Strumella canker | |
| Suillus cothurnatus Sing. | mycorrhizal symbiont | |
| Suillus granulatus (L.: Fr.) Kuntze | Boletus granulatus L.: Fr. | mycorrhizal symbiont |
| Suillus pictus (Pk.) Smith & Thiers | Boletinus pictus (Pk.) Smith & Thiers | mycorrhizal symbiont |
| Suillus subaureus (Pk.) Snell ex Slipp et Snell | Boletinus subaureus (Pk.) Snell ex Slipp | mycorrhizal symbiont |
| et Snell | ||
| Suillus subluteus (Pk.) Snell ex Slipp et Snell | Boletus subluteus Pk. | mycorrhizal symbiont |
| T | ||
| Taphrina caerulescens (Mont. et Desm.) Tul. | oak leaf blister | |
| Taphrina carveri Jenk. | tar spot | |
| Taphrina cerasi (Fckl.) Sadeb. | cherry leaf curl | |
| Taphrina johansonii Sadeb. | catkin deformity | |
| Taphrina populi-salicis Mix | yellow leaf blister | |
| Thyronectria austro-americana (Speg.) Seeler | honeylocust wilt | |
| Trametes serialis Fr. | Coriolellus serialis (Fr.) Murr. | heart rot |
| Tranzschelia pruni-spinosae (Pers.) Diet. | cherry rust | |
| Tricholoma flavovirens (Pers.: Fr.) Lund. | mycorrhizal symbiont | |
| Tuber griseum Pers.: Fr. | Tuber magnatum Pico in Vitt. | mycorrhizal symbiont |
| Tuber melanosporum Vitt. | mycorrhizal symbiont | |
| Tylopilus felleus (Bull.: Fr.) Karst. | Boletus felleus Bull.: Fr. | mycorrhizal symbiont |
| Tympanis pinastri (Pers.: Fr.) Tul. | bark saprophyte | |
| Tyromyces amarus (Hedg.) Lowe | Polyporus amarus Hedgc. | pocket dry rot |
| Tyromyces balsameus (Pk.) Murr. | Polyporus balsameus Pk. | brown cubical rot |
| (See also Climacocystis) | ||
| Tyromyces borealis (Fr.) Imaz. | Polyporus borealis Fr. | heart rot |
| Tyromyces spraguei (Berk. et Curt.) Murr. | Polyporus spraguei Berk. et Curt. | root rot |
| U | ||
| Uncinula circinata Cke. et Pk. | powdery mildew | |
| Uncinula clintonii Pk. | powdery mildew | |
| Uncinula flexuosa Pk. | powdery mildew | |
| Uncinula salicis Wint. | powdery mildew | |
| Uredinopsis pteridis Diet. et Holw. in Diet. | Uredinopsis macrosperma Cke. | needle rust |
| Uredinopsis struthiopteridis Stormer | needle rust | |
| Uromyces digitatus Wint. | koa leaf blister | |
| Uromyces koae Arth. | koa witches' broom | |
| Ustulina deusta (Hoff.: Fr.) Lind. | trunk rot | |
| Ustulina vulgaris Tul. | wood rot | |
| V | ||
| Valsa kunzei Fr. | canker | |
| Venturia acerina Plak. | leaf spot | |
| Venturia macularis (Fr.) Mull. et v. Arx | Venturia tremulae Aderh. | shepherd's crook shoot blight |
| Venturia populina (Vuill.) Fabrici | shepherd's crook shoot blight | |
| Verticicladiella wageneri Kend. | Ceratocytis waganeri Goheen et Cobb) | black stain root rot |
| (Perfect state) | ||
| Verticillium albo-atrum Reinke et Berth. | Verticillium wilt | |
| Virgella robusta (Tub.) Darker | needle cast | |
| Virus- Cucumber mosaic | cucumber mosaic virus | |
| Virus- Maclura mosaic | Maclura mosaic virus | |
| Virus- Morsus ulmi | elm phloem necrosis virus | |
| W | ||
| Wolfiporia cocos (Wolf) Ryv. et Gilbn. | Poria cocos Wolf | brown root and butt rot |
| X | ||
| Xiphinema americanum Cobb | dagger nematode | |
| Xylobolus frustulatus (Pers.: Fr.) Boidin | white pocket rot of hardwoods | |