Data Enrichment
Diseases with Causal Agents
Diseases with identified causal agents (pathogens). Agent identification is the first step toward targeted management recommendations.
545 of 551 diseases
Alkali Yellows
Alkali yellows
Alternaria Blight
Alternaria spp
Alternaria Fruit Rot
Alternaria spp
Alternaria Leaf Spot
Alternaria spp
Angular leaf spot
Pseudomonas syringae pv
Annosus Root Rot
Heterobasidion annosum (syn
Anthracnose
Colletotrichum acutatum complex (C
Anthracnose (Bull's-eye Rot)
Cryptosporiopsis curvispora
Anthracnose and Bull's-eye rot
Neofabraea spp
Anthracnose Blotch
Ophiognomonia leptostyla (syn
Apple Mosaic
Apple mosaic
Apple Proliferation
Apple proliferation
Armillaria Crown and Root Rot
Armillaria mellea
Armillaria Root Rot
Armillaria ostoyae
Ascospora Dieback
Seimatosporium lichenicola
Aspen Trunk Rot
Daldinia concentrica
Aster Yellows
Candidatus Phytoplasma asteris
Aster Yellows (Late-breaking Virus)
Candidatus Phytoplasma asteris
Bacterial Blight
Pseudomonas syringae pv
Bacterial blight (Leaf spot)
Pseudomonas syringae pv
Bacterial Blights
Pseudomonas syringae
Bacterial Brown Spot
Pseudomonas spp
Bacterial Canker
Pseudomonas syringae pv
Bacterial Canker and Blast
Pseudomonas syringae pv
Bacterial Leaf Spot
Xanthomonas spp
Bacterial Leaf Spot (Bacterial Blight)
Pseudomonas spp
Bacterial Leaf Spot and Blast
Pseudomonas syringae
Bacterial Leaf Spot and Dieback
Pseudomonas syringae
Bacterial Leaf Spot and Stem Canker
Xanthomonas hortorum pv
Bacterial Leaf Spots
Pseudomonas syringae
Bacterial Soft Rot, Blackleg, and Lenticel Rot
Pectobacterium spp
Bacterial Spot
Xanthomonas spp
Bacterial Stem Rot
Pectobacterium carotovorum
Bacterial twig blight
Pseudomonas syringae (bacterial)
Bacterial Wetwood
Enterobacter cloacae and Klebsiella pneumoniae
Bacterial Wetwood Slime Flux
Enterobacter cloacae
Bacterial Wilt
Corynebacterium sepedonicum
Basal Rot
Fusarium oxysporum
Basal Rot (Bulb Rot)
Fusarium spp
Basal Stem and Root Rot
Phytophthora spp
Berckmann's Blight
Hendersonia coniothyrium
Bitter Pit
Non-pathogenic (calcium deficiency)
Black Canker
An uncharacterized
Black Canker (Target Canker)
Ceratocystis fimbriata (black canker); Cytospora notastroma (target canker)
Black Death
Tomato spotted wilt virus (TSWV)
Black Dot
Colletotrichum coccodes
Black Flagging
Abiotic (environmental stress)
Black Foot Disease
Leptographium wageneri
Black Knot
Apiosporina morbosa
Black Leaf Spot
Diplocarpon rosae
Black leg
Chalara thielavioides
Black Mold
Chlaropsis thielavioides
Black Root Rot
Thielaviopsis basicola
Black Root Rot Complex
Rhizoctonia fragariae, Cylindrocarpon spp
Black Spot
[NOTE: Diplocarpon rosae causes black spot on roses (Rosa spp
Black Spot (Internal Black Spot)
Alternaria spp
Black Stem
Phoma spp
Black Walnut Toxicity
Abiotic (juglone)
Black-Stain Root Disease
Leptographium wageneri
Blackberry Collapse
[VERIFY]
Blackberry Rust
Phragmidium spp
Blackleaf
Chalara spp
Blackline
Blackline virus
Blanks
[VERIFY]
Bleeding Canker
Phytophthora spp
Blister Rust
Cronartium ribicola
Blossom-end Rot
Abiotic (calcium deficiency)
Blue Mold Rot
Penicillium expansum
Boron Deficiency
Many commercial
Botryosphaeria Dieback
Botryosphaeria dothidea
Botryosphaeria Fruit Rot and Berry Speckle
Botryosphaeria spp
Botrytis Blight
Botrytis cinerea
Botrytis Bud and Twig Blight
Botrytis cinerea
Botrytis Bunch Rot
Botrytis cinerea
Botrytis Bunch Rot Gray Mold
Botrytis cinerea
Botrytis Petal Blight
Botrytis cinerea
Botrytis Shoot Blight
Botrytis cinerea
Box Blight
Calonectria pseudonaviculata
Boxwood Blight
Boxwood blight
Branch Canker
Various fungi (Phoma spp
Brand and Common Canker
Two fungi
Brand canker
Kalmusia coniothorium
Break Viruses
Little Cherry Virus-1 and Little Cherry Virus-2
Brittle Decay
Kretzschmaria deusta
Broom Rust
Gymnosporangium libocedri
Brown Canker
Cryptosporella umbrina (anamorph: Diaporthe umbrina)
Brown Leaf Blotch
[VERIFY]
Brown Patch
Rhizoctonia solani
Brown Rot
Monilinia fructicola and M
Brown Rot Blossom Blight and Fruit Rot
The fungi
Brown Spot and Black Pit
Pseudomonas syringae
Brown Stain
Cryptosporella umbrina
Bud Blight
Seifertia azaleae
Bud Failure
Abiotic or viral
Bulb Rots
Fusarium spp
Bulb Rots (Bacterial Soft Rots, Enterobacter Bulb Decay, Slippery Skin, Sour Skin, and Yeast Soft Rot)
Pectobacterium carotovorum and Enterobacter spp
Bull's-eye Rot
Cryptosporiopsis curvispora
Bullhead
Non-pathogenic (physiological — cold damage during flower development)
Burrknot
Non-pathogenic (genetic/physiological)
Calico
Prunus necrotic ringspot virus (PNRSV)
Cane and Leaf Rust
Phragmidium spp
Cane and Leaf Spot
Sphaerulina westendorpii (formerly Septoria rubi) on Rubus; Diaporthe ampelin...
Cane Blight
Kalmusia coniothyrium
Canker
Symptom category — not a single disease
Canker and Dieback
Multiple pathogens (Phomopsis spp
Canker and Stem Diseases
[VERIFY]
Cankers and Diebacks
Multiple fungi (Botryosphaeria spp
Catface
Abiotic (cold injury during bloom)
Catkin Blast
Kalmusia coniothyrium
Catkin Hypertrophy and Leaf Curl
Viral agents
Cedar Flagging
Evergreen plants
Cercospora Leaf Spot
Cercospora spp
Charcoal Rot
Macrophomina phaseolina
Chemical Injury
Abiotic
Cherry Mottle Leaf
The cherry
Cherry Twisted Leaf
Cherry twisted
Chestnut Blight
Cryphonectria parasitica (syn
Clover Broom-rape
Orobanche minor
Coin Canker
Nectria cinnabarina
Cold Injury
Abiotic
Collar Rot
Phytophthora cactorum
Common And Yellow Mosaics
Bean common mosaic virus and Bean yellow mosaic virus
Common canker
Coniothyrium wernsdorffiae and Paraconiothyrium fuckelii
Common Leaf Spot
Ramularia grevilleana
Common Scab
Streptomyces scabies
Coniophora Growth
Fungal growth
Cork Spot
Non-pathogenic (calcium deficiency)
Corky Ringspot
Tobacco rattle virus (TRV)
Corm Rot
Fusarium spp
Coryneum blight (Shothole)
Wilsonomyces carpophilus
Cottonball
Abiotic (symptom)
Crinkle Leaf and Deep Suture
Believed to
Crown and Cane Gall
Agrobacterium tumefaciens
Crown and Collar Rot
Phytophthora cactorum (primary), P
Crown and Root Rot
Phytophthora spp
Crown Gall
Rhizobium radiobacter (formerly Agrobacterium tumefaciens)
Crown Rot
The fungal
Crumbly Fruit
Raspberry bushy dwarf virus (RBDV) + raspberry leaf mottle virus (RLMV) complex
Cryptosphaeria Canker (Snake Canker)
Cryptosphaeria punctata
Cucumber mosaic virus
Cucumber mosaic virus
Curly Top
Beet curly top virus
Curly top (Beet curly top virus)
Beet curly top virus
Current-season Needle Necrosis
[VERIFY]
Cutting Rots
Rhododendron and
Cyclaneusma Needle Cast
Cyclaneusma minus
Cylindrocarpon Root Rot
Cylindrocarpon spp
Cylindrocladium Blight and Root Rot
Cylindrocladium scoparium
Cylindrocladium Root Rot
Cylindrocladium spp
Cytospora Canker
Cytospora canker
Damping-off
Several soilborne
Damping-off (Seed and Seedling Rot)
Pythium spp
Dasheen Mosaic
Dasheen mosaic virus (DsMV)
Daylily Rust
Puccinia hemerocallidis
Dead Bud
Abiotic or frost injury
Dead Spur
Apple dead
Decline
Pear decline
Decline/Collapse Syndrome
Candidatus Phytoplasma pyri
Die-off
Pythium spp
Diplodia Canker
Diplodia seriata and D
Diseases
Three viruses generally considered as \"latent\" in apple are apple stem groo...
Dodder
Cuscuta spp
Dollar Spot
Clarireedia jacksonii
Dothistroma Needle Blight (Red Band)
Dothistroma septosporum (and/or D
Double Streak
Potato virus Y + Potato virus X co-infection
Downy Leaf Spot
Pseudomicrostroma juglandis (syn
Downy Mildew
Peronospora sparsa
Drippy Dieback
Lonsdalea quercina subsp
Drought Injury
Many conifers
Dry Berry
Described as
Dry Cell (Dry Berry) Syndrome
Monilinia rubi
Dutch Elm Disease
Ophiostoma novo-ulmi
Dwarf Mistletoe
Arceuthobium spp
Early Blight
Alternaria solani
Early Leaf Spot
Phyllosticta cotoneastri (primary); Entomosporium maculatum (secondary)
Eastern Filbert Blight
Anisogramma anomala
Elytroderma Needle Cast
Elytroderma deformans
Eola Rasp Leaf (Yellow Bud Mosaic)
Eola rasp
Esca, Young Esca, and Petri Disease
Phaeomoniella chlamydospora
European Canker Nectria Canker
Nectria cinnabarina and Neonectria ditissima
Eutypa Dieback
Eutypa lata
Fabraea Leaf Spot
Fabraea maculata
Failure to bloom
Abiotic
False Blossom
Cranberry false blossom virus
Fasciation
Multiple possible causes (see Disease Cycle section)
Fig Mosaic Disease
Fig mosaic virus
Fire Blight
Erwinia amylovora
Flat Apple Disease
Apple flat
Flower and Petal Blight
Ciborinia camelliae
Fluoride Toxicity
Abiotic (fluoride exposure)
Frosty Mildew
Microstroma album
Fruit Rot
Phytophthora cactorum
Fruit Rot and Cane Botrytis
Botrytis cinerea
Fruit Rot, Phytophthora
Phytophthora cactorum
Fruit Russeting
Fruit russet
Fungal Cankers
Although bacterial
Fungal leaf spots
Phyllosticta sp
Fusarium Basal Rot
Fusarium oxysporum
Fusarium Bulb Rot of Onion and Garlic (Dry Rot)
Fusarium oxysporum f
Fusarium Canker
Fusarium spp
Fusarium Crown and Foot Root
Fusarium spp
Fusarium Crown and Root Rot
Fusarium oxysporum
Fusarium Dry Rot
Fusarium spp
Fusarium Patch
Microdochium nivale
Fusarium Root and Crown Rot
Fusarium spp
Fusarium Root Rot
Fusarium spp
Fusarium Wilt
Fusarium oxysporum
Fusarium Wilt (Fusarium Foot Rot)
Fusarium oxysporum
Fusicoccum Canker (Godronia Canker)
Godronia cassandrae
Ganoderma Root and Butt Rot
Ganoderma applanatum
Grapevine Red Blotch Disease
Grapevine red blotch virus
Grapevine Trunk Disease
Eutypa lata, Botryosphaeria spp
Gray Blight
Pestalotiopsis sydowiana
Gray Leaf Spot
Pyricularia grisea
Gray Mold
Botrytis cinerea
Green Algae
Green algae
Green Crinkle Disease
This disease
Green Dwarf (Curly Top)
Beet curly top virus (BCTV)
Grovesiella Canker
Grovesiella punctata
Gumming
Mechanical injury
Gumming (Gummosis)
Non-pathogenic (physiological response to injury/stress)
Gummy Stem Blight (Vine Decline)
Stagonosporopsis cucurbitacearum (syn
Hail damage
Abiotic
Herbicide damage
Abiotic
Heterobasidion Root Disease
Heterobasidion annosum
Hypocotyl Rot and Root Rot
In most
Impatiens Necrotic Spot
Impatiens necrotic spot virus (INSV)
Incorrect soil pH
Non-pathogenic (abiotic — soil pH imbalance)
Inflorescence Necrosis (Bunch Stem Necrosis)
Viral agents
Ink Spot
[VERIFY]
Inonotus Root and Butt Rot
Pseudoinonotus dryadeus
Interior Needle Blight
Multiple fungi (Rhizosphaera spp
Iris Yellow Spot
Iris yellow spot virus (IYSV)
Iron Chlorosis
Abiotic (iron deficiency)
June Drop
The normal
Kernel Molds
Fungal agents (multiple)
Laminated Root Rot
Coniferiporia sulphurascens
Late Blight
Phytophthora infestans
Latent Virus Diseases
Three viruses
Latent Viruses
Various latent viruses
Leaf And Cane Spot
[VERIFY]
Leaf and Flower Gall
Exobasidium vaccinii
Leaf and Shoot Blight
[VERIFY]
Leaf and Stem Blight
Pseudonectria buxi (asexual: Volutella buxi) and P
Leaf and Stem Spot
[VERIFY]
Leaf Blight
Fungal agents (multiple)
Leaf Blight (Keithia Blight)
Didymascella thujina
Leaf Blister
Taphrina spp
Leaf Blotch
Non-pathogenic (physiological)
Leaf Burn
Non-pathogenic (abiotic stress)
Leaf Curl
Taphrina deformans
Leaf Drop
Non-pathogenic (physiological)
Leaf Gall
Abiotic or fungal
Leaf Gall (Blisters)
Abiotic or fungal
Leaf Mold
Passalora fulva (syn
Leaf Rust
Uredinales (rust fungi)
Leaf Scorch
abiotic (drought, heat stress) or bacterial (Xylella fastidiosa in limited re...
Leaf scorch (marginal leaf necrosis)
Sphaerulina azaleae (formerly Septoria azaleae)
Leaf Scorch And Leaf Roll
Sphaerulina azaleae (formerly Septoria azaleae)
Leaf Spot
Symptom category — not a single disease
Leaf spot (Diplocarpon)
Diplocarpon spp
Leaf Spot and Twig Blight
Diaporthe vaccinii (asexual Phomopsis vaccinii)
Leaf Spots and Blights
Phyllosticta sp
Leaf Spots and Shothole
Phyllosticta sp
Leaf Spots and Twig Blights
Diaporthe vaccinii (asexual Phomopsis vaccinii)
Leaf Spots, Miscellaneous
Several fungal (primarily Rosisphaerella rosicola/Cercospora and Elsinoe rosa...
Leafroll
Grapevine leafroll virus
Leak
Pythium spp
Leather Rot
The fungal
Lilac Ring Mottle
Lilac ring
Lime-induced Chlorosis
Non-pathogenic (iron deficiency)
Little Cherry
Little cherry
Lophodermella Needle Cast
Lophodermella concolor
Lophodermium Needle Cast
Lophodermium spp
Lower Stem Canker
[VERIFY]
Madrone Canker
[VERIFY]
Magnesium Deficiency
Abiotic
Marginal leaf necrosis
Xylella fastidiosa or abiotic
Marssonina leaf and twig spot
Marssonina spp
Marssonina Leaf Spot
Marssonina spp
Medusa Needle Blight
Davisomycella medusa
Mistletoe
Arceuthobium spp
Mistletoe (a True Mistletoe)
Phoradendron villosum
Moldy Core and Core Rots
Several different
Mosaic
Apple mosaic virus (ApMV)
Mosses and Lichens
Non-pathogenic
Mottle leaf
Cherry mottle leaf virus
Mummy Berry
Monilinia vaccinii-corymbosi
Neck Rot
Botrytis allii
Neck Rot (Gray Mold)
Botrytis allii
Necrotic Leaf Blotch (Golden Leaf Drop)
Non-pathogenic (physiological)
Necrotic Leaf Spot
Isolation attempts
Necrotic Ring Spot
Ophiosphaerella korrae
Necrotic Ringspot
Rhododendron necrotic ringspot virus
Necrotic rusty mottle
Uncharacterized graft
Necrotic Rusty Mottle (Lambert Mottle) and Rusty Mottle
Uncharacterized graft
Nectria Canker
Neonectria ditissima
Nectria Canker (European Canker)
Neonectria ditissima
Nectria Twig Blight (Coral Spot)
Nectria cinnabarina
Needle Blight
The fungi
Needle Cast
Rhabdocline spp
Needle Cast, Rhabdocline
Rhabdocline spp
Needle Cast, Swiss
Nothophaeocryptopus gaeumannii
Needle Distortion
[VERIFY]
Needle Drop
Abiotic or environmental stress
Needle Rusts
Gymnosporangium spp
Nematode, Bud and Leaf
Aphelenchoides spp
Nematode, Clover-cyst
Heterodera trifolii
Nematode, Dagger
Xiphinema americanum
Nematode, Foliar
Aphelenchoides fragariae
Nematode, Lesion
Pratylenchus spp
Nematode, Potato Cyst
Globodera spp
Nematode, Potato Rot
Ditylenchus destructor
Nematode, Ring
Mesocriconema spp
Nematode, Root-knot
Meloidogyne hapla
Nematode, Root-lesion
Pratylenchus penetrans
Nematode, Stem
Ditylenchus dipsaci
Nematode, Stem and Bulb
Ditylenchus dipsaci
Nematode, Stubby-root
Paratrichodorus renifer
Nematode, Stunt
Tylenchorhynchus claytoni
Nematodes
Nematodes are
Neonectia Canker
Neonectria ditissima
Northern Anthracnose
Kabatiella caulivora
Oedema
Non-pathogenic (physiological — water imbalance)
Oil Discoloration of Foliage
abiotic (spray oil residue)
Olive Leaf Spot (Peacock Spot, Peacock's Eye)
Spilocea oleagina (syn
Orange Rust
Phragmidium spp
Orford-cedar (Chamaecyparis lawsoniana)
[VERIFY]
Ovulinia Petal Blight
Ovulinia azaleae
Pacific Coast Pear Rust
Gymnosporangium libocedri
Pear Scab
Venturia pirina
Pear Trellis Rust
Gymnosporangium spp
Pecky Rot
Postia amara
Pencil Rot (Brown Pocket Rot)
Stem decay
Peony Red Spot
[VERIFY]
Perennial Canker (Bull's-eye Rot)
Cryptosporiopsis perennans
Phoma Rot
Phoma spp
Phomopsis Twig Blight
Diaporthe vaccinii
Phyllody
Candidatus Phytoplasma spp
Phyllosticta Leaf Spot
Phyllosticta spp
Physiological leaf spot
Non-pathogenic (physiological disorder)
Physiological Leafroll
Abiotic (environmental stress)
Physiological shothole
Abiotic
Phytophthora Blight
Phytophthora spp
Phytophthora Blight and Dieback
Many different
Phytophthora Canker
Phytophthora syringae
Phytophthora Canker and Shoot Blight
Phytophthora spp
Phytophthora Dieback
Phytophthora spp
Phytophthora fruit rot
Phytophthora spp
Phytophthora leaf & twig blight
Phytophthora spp
Phytophthora Leaf and Twig Blight
Phytophthora ilicis
Phytophthora Root and Crown Rot
Phytophthora cinnamomi
Phytophthora Root and Runner Rot
Phytophthora spp
Phytophthora Root Rot
Phytophthora spp
Phytophthora Root Rot and Wilt
Phytophthora spp
Phytophthora Stem Canker
Phytophthora spp
Pierce's Disease
Xylella fastidiosa
Pine Wilt
Bursaphelenchus xylophilus
Pink Root
Setophoma terrestris (syn
Pink Rot
Phytophthora erythroseptica
Pinot Leaf Curl
Apples chlorotic leaf spot virus (ACLSV)
Pitting
Multiple fungal agents
Plum Pockets
Taphrina pruni
Plum Pox (Sharka)
Plum pox virus (PPV)
Pollination failure
Abiotic/Environmental factors
Port Orford cedar root rot
Phytophthora lateralis
Postharvest Rots
Many fungi
Potato Leafroll Virus (Leaf Roll)
Potato leafroll virus (PLRV)
Potato Mop-Top Virus
Potato mop-top virus (PMTV)
Potato Rugose Mosaic
Potato virus Y (PVY) + Potato virus X (PVX)
Potato Virus Y
Potato virus Y (PVY)
Potato Wart
Synchytrium endobioticum
Powdery Mildew
Podosphaera aphanis var
Powdery Scab
Spongospora subterranea
Prune Dwarf
Prune dwarf
Prunus Necrotic Ringspot
Prunus necrotic
Pseudomonas Blight
Pseudomonas syringae pv
Pseudomonas Blossom Blast
Pseudomonas syringae
Pseudomonas Blossom Blast and Dieback
Pseudomonas syringae
Punky Bulb
Abiotic or Fusarium spp
Purple Blotch
Thrips tabaci
Purple Needle Eater (Delphinella Shoot Blight)
Delphinella balsameae
Purple Spot
Alternaria porri
Purple Top
Candidatus Phytoplasma spp
Pyrenobotrys Leaf Spot
Pyrenobotrys compacta
Pythium Blight
Pythium spp
Pythium Crown and Root Rot
Pythium spp
Pythium Root Rot
Pythium spp
Ramorum leaf and shoot blight (Sudden oak death)
Phytophthora ramorum
Ramorum Leaf Blight
Phytophthora ramorum
Ramorum Leaf Blight and Shoot Dieback
Phytophthora ramorum"filthy five\" genera are inc
Ramorum Shoot Dieback
Phytophthora ramorum
Rasp Leaf
Cherry rasp
Red Leaf
Blueberry leaf mottle virus or Abiotic
Red Leaf Spot
Phyllosticta cotoneastri
Red Leaf Spotting
Several factors
Red Shoot
Phytophthora spp
Red Spot Fruit Blemish (Freckles)
Xanthomonas citri
Red Stele
Phytophthora fragariae var
Red Thread
Laetisaria fuciformis
Replant Disease
Pythium spp
Rhabdocline needle cast
Rhabdocline pseudotsugae
Rhizoctonia Canker (Black Scurf)
Rhizoctonia solani
Rhizosphaera Needle Cast
Nothophaeocryptopus gaeumannii
Ring Rot
Clavibacter michiganensis subsp
Ringspot
Tomato ringspot
Ringspot Disease
Camellia ringspot virus
Ripe Rot (Anthracnose)
Colletotrichum spp
Root and Crown Rot
Phytophthora cinnamomi
Root and Cutting Rots
Phytophthora spp
Root and Stem Rot
Phytophthora syringae
Root Rot
Symptom category — not a single disease
Root Rot (Armillaria ostoyae)
Armillaria ostoyae
Root Rot (Armillaria)
Armillaria spp
Root Rot (Phytophthora spp.)
Phytophthora spp
Root Rot and Dieback
Multiple pathogens (Phytophthora spp
Root Rot, Phytophthora
Phytophthora spp
Rose Bloom
Environmental/nutritional disorder
Rose Mosaic
Several viruses
Rosette
This problem
Rubbery Wood and Flat Limb
These diseases
Rugose
[VERIFY] (multiple possible causes)
Russeting
Non-pathogenic (physiological disorder — epidermal cell damage)
Rust
Thekopsora minima and Naohidemyces vaccinii
Rust (Brown Rust)
Puccinia spp
Rust (Pucciniastrum)
Pucciniastrum spp
Rust (Uredinopsis)
Uredinopsis spp
Rusty Spot
Chrysomyxa piperiana
Salt Damage
Excess sodium chloride
Salt injury
Excess sodium chloride
Scab
Venturia inaequalis
Scab (Gummosis)
Pseudomonas syringae
Scar Skin and Dapple Apple
These diseases
Schweinitzii root and butt rot
Phaeolus schweinitzii
Sclerotinia Crown Rot and Wilt
Sclerotinia sclerotiorum
Sclerotinia Stem Rot (White Mold)
Sclerotinia sclerotiorum
Sclerotinia Wilt and Head Rot
Sclerotinia sclerotiorum
Scorch
The blueberry
Seed Piece Decay
Fusarium spp
Seiridium Canker
Seiridium cardinale
Septoria Leaf Spot
Septoria spp
Septoria Leaf Spot and Canker
Septoria spp
Shock
The blueberry
Shoot Blight
Phytophthora cactorum"heeled in\" (placed in sawdust piles) after bare-root s...
Shoot Proliferation and Leafy Gall
Rhodococcus fascians
Shoot Tip Dieback
Phomopsis spp
Short Shoot Syndrome
Phytoplasma spp
Shothole
Stigmina carpophila or Diaporthe spp
Shothole (Coryneum Blight)
Stigmina carpophila
Silver Leaf
Chondrostereum purpureum
Silver Scurf
Helminthosporium solani
Sirococcus Shoot Blight
Sirococcus conigenus
Slime Mold
Physarum spp
Smut
Ustilago spp
Soft Rot
Pectobacterium spp
Sooty Bark Disease
Cryptostroma corticale
Sooty Mold
Fumago vagans
Sooty Mold (Black Mold)
Saprophytic fungi
Sooty-bark Canker
Cryptostroma corticale
Sour Cherry Yellows
Prune dwarf
Sour Rot
Geotrichum candidum
Southern Blight
Athelia rolfsii (syn
Sparassis Root Rot
Sparassis crispa (syn
Split Pit
Environmental/temperature stress
Spotted Wilt
Ophiostoma ulmi or Elm phloem necrosis virus
Spring Black Stem and Leaf Spot (Black Stem)
Phoma medicaginis
Sprinkler Rot (Phytophthora Fruit Rot)
Phytophthora spp
Spur Blight
Xenodidymella applanata
Stamen Blight
Anthophora dendrobii or Botryotinia fuckeliana
Stem Canker
Botryosphaeria corticis
Stem Decay
Stem decay
Stem Gall
Crown gall bacteria (Agrobacterium tumefaciens)
Stem Pitting
Several causes
Stem Rot
Phytophthora syringae (primary), P
Stemphylium Leaf Blight and Stalk Rot
Stemphylium vesicarium
Stigmina Blight
Pseudocercospora thujina
Stony Pit
Graft-transmissible virus (causal virus not definitively identified)
Storage Problems
Botrytis cinerea, Penicillium spp
Storage Rots
Penicillium spp
Stripe Smut
Ustilago striiformis
Stunt
Blueberry stunt phytoplasma
Stunt (Dilly)
Daffodil yellow stripe virus (DYVV)
Sudden Oak Death
Phytophthora ramorum
Sunburn
Non-pathogenic (abiotic — solar radiation damage)
Swiss needle cast
Nothophaeocryptopus gaeumannii
Sycamore Anthracnose
Apiognomonia veneta (syn
Take All Patch
Gaeumannomyces avenae (syn
Tar Spots
Rhytisma punctatum
Thielaviopsis Root Rot (Black Root Rot)
Thielaviopsis basicola
Thousand Cankers Disease
Geosmithia morbida (vectored by Pityophthorus juglandis)
Tip Blight
Diaporthe vaccinii or Diplodia tip blight agents
Tissue Proliferation
Non-pathogenic; genetic/physiological abnormality from tissue culture micropr...
Tomato Big Bud (Aster Yellows)
Candidatus Phytoplasma asteris
Tomato Mosaic
Tomato mosaic virus (ToMV)
Tomato Spotted Wilt
Tomato spotted wilt virus (TSWV)
Tomato Yellow Leaf Curl
Tomato yellow leaf curl virus (TYLCV)
Toxic Cucumber
[VERIFY] (specific agent unclear)
Translucent End (Jelly End Rot)
Abiotic (physiological disorder)
Trellis Rust (European Pear Rust)
Gymnosporangium sabinae
Twig Blight
Diaporthe vaccinii
Twig Blight (Scab)
Venturia spp
Twig blight (Venturia)
Venturia spp
Twig Canker
Sporocadus lichenicola
Twig Dieback
Phacidiopycnis washingtonensis
Twig Dieback and Canker
Phacidiopycnis washingtonensis
Twister
Abiotic (herbicide injury, typically 2,4-D)
Typhula Snow Mold
Typhula incarnata and T
Union Necrosis and Decline
Tomato ringspot
Upper and Lower Stem Canker (Phoma Blight)
Phoma spp
Upper stem canker
Diaporthe phaseolorum
Upright Dieback
Diaporthe vaccinii (asexual: Phomopsis vaccinii)
Variegation
Both a
Vascular Streak Dieback
Ceratobasidium theobromae (syn
Vein Yellows (Red Mottle and Sooty Ringspot of Quince)
Vein yellows
Verticillium Wilt
Verticillium dahliae
Verticillium Wilt (Potato Early Dying)
Verticillium dahliae
Virus
Raspberry bushy dwarf virus and related viruses
Virus and Virus-like Diseases
Multiple plant viruses
Virus Diseases
Blueberry mosaic virus and related viruses
Virus-induced Cherry Decline
One of
Volutella Leaf and Stem Blight (Canker)
Pseudonectria buxi
Walnut Blight
Xanthomonas arboricola pv
Web Blight
Rhizoctonia spp
Western Gall Rust
Endocronartium harknessii
Wet Feet
Pythium spp
White mold
Sclerotinia sclerotiorum
White Mold (Sclerotinia Stem Rot)
Sclerotinia sclerotiorum
White Mold Sclerotinia Rot
Sclerotinia sclerotiorum
White Mottled Rot
Sclerotinia spp
White Pine Blister Rust
Cronartium ribicola
White Pocket Rot (Piped Rot)
Inonotus dryophilus
White Rot
Stromatinia cepivora (syn
White Rust
Albugo candida
Winter Injury
Cold and
Witches' Broom
Taphrina wiesneri
Witches' Broom Rust
Gymnosporangium juniperi-virginianae or similar
Witches'-broom (Cherry leaf curl)
Taphrina wiesneri
Wood Decay
Limb and
X-Disease
Candidatus Phytoplasma pruni
Yellow Root Rot
Perreniporia subacida
Yellow Rust
Phragmidium rubi
Yellow Shoulder (Yellow Top, Persistent Green Shoulders)
Abiotic (uneven ripening)
Yellow Vein
Strawberry yellow edge virus (StYEV)
Yellows
Various causes (phytoplasma or viral)
Young Vine Decline
Phaeomoniella chlamydospora, Phaeoacremonium spp
Zebra Chip
Candidatus Liberibacter solanacearum