| 4823066 |
Leptographium root disease |
Leptographium procerum |
Various insects feeding on roots vector infection. Resin-impregnated soil crusts form at feeding or boring sites. Xylem becomes resin "soaked". |
| 4823097 |
annosum root disease |
Heterobasidion annosum |
Incipient resinosis with associated clump of resin-impregnated soil around infected root. |
| 4823096 |
annosum root disease |
Heterobasidion annosum |
3/4 of vascular tissue resin soaked (note discoloration). |
| 4823033 |
brown spot needle blight of pine |
Mycosphaerella dearnessii |
needle lesions with linear black perithecial stromata developing in the necrotic areas |
| 4825028 |
Neonectria canker |
Neonectria galligena |
rough bark at root collar. |
| 4824059 |
charcoal rot |
Macrophomina phaseolina |
Wilting and discoloration of infected seedlings. |
| 4824026 |
Diplodia tip blights |
Diplodia spp. |
D. pini causing branch flagging. |
| 4824027 |
Diplodia tip blights |
Diplodia spp. |
D. pini causing a resinous stem canker |
| 4823034 |
brown spot needle blight of pine |
Mycosphaerella dearnessii |
Infected older foliage of grass stage seedling. New needles at top of plant are not yet infected. |
| 4823056 |
pine needle cast |
Lophodermella cerina |
Hysterothecia, small (1-2 mm), black elongated fruting bodies which produce ascospores, on necrotic needles. Also present are the smaller conidiomata. |
| 4822063 |
ash rusts |
Puccinia sparganioides |
Leaf distortion, petiole hypertrophy and distinctive pycnia and aecial "cluster cup" with orange-yellow aeciospores proliferating from the surface of infected tissue. |
| 4823032 |
brown spot needle blight of pine |
Mycosphaerella dearnessii |
typical lesions |
| 4823018 |
Inonotus heartrot |
Inonotus rickii |
Advanced wood decay. Note the distinct, narrow darkened zones of sound wood at the martgins of the decayed wood. |
| 4822074 |
pine needle rusts |
Coleosporium spp. |
Yellow-orange fissures develop in late spring on infected needles. |
| 4822040 |
Dutch elm disease |
Ophiostoma ulmi |
Foliage wilting, flagging (yellow), defoliation, and crown dieback |
| 4822058 |
pitch canker |
Fusarium subglutinans |
Mortality of upper main stem |
| 4822031 |
Inonotus heartrot |
Inonotus rickii |
Cushion/pad-like structure (an apparent sporocarp initial) at branch stub. Note sap running from decay site |
| 4824090 |
pine tip blight |
|
Tip Blight caused by a variety of fungi: Fusarium spp., Lasiodiplodia (Diplodia) spp., Macrophomina phaseolina. Occurs when shoot tips are succlent and rapidly growing. "Blighted" seedlings often recover. |
| 4824080 |
pitch canker |
Fusarium subglutinans |
Basal swelling at root collar. |
| 4824077 |
Fusarium wilts, blights, rots and damping-off |
Fusarium spp. |
Affects lateral (feeder) and tap roots. Tap root may exhibit varying degrees of resin soaking. |
| 4824070 |
brown spot needle blight of pine |
Mycosphaerella dearnessii |
Multiple infection spots spreading across nursery beds. |
| 4824032 |
pitch canker |
Fusarium subglutinans |
Dieback of infected seedling. |
| 4824014 |
Cylindrocladium root diseases |
Cylindrocladium spp. |
Damaged seedlings infected with C. floridanum. Lack of aeration as foliage mats (or lays down) down causes disease to spread across tray. |
| 4823100 |
red root and butt rot |
Inonotus circinatus |
A major pathogen of older (greater than 20 years) sand pines in both planted and natural stands. Decayed wood and roots exhibit reddish to red-brown discoloration and eventually a rot flecked with small elliptical white pockets. |
| 4824001 |
red root and butt rot |
Inonotus circinatus |
A major pathogen of older (greater than 20 years) sand pines in both planted and natural stands. Decayed wood and roots exhibit reddish to red-brown discoloration and eventually a rot flecked with small elliptical white pockets. |
| 4823092 |
annosum root disease |
Heterobasidion annosum |
Wind throw of infected trees. |
| 4823090 |
annosum root disease |
Heterobasidion annosum |
Thinning crown of infected tree (center) |
| 4823076 |
sand pine root disease |
|
Old growth tree kiled by Inonotus circinatus (Fr.) R.L. Gilbertson. One of the complex of fungi (I. circinatus, Phytophthora cinnamomi, Phaeolus schweinitzii, Verticicladiella procera, Armillariella tabescens, Heterobasidion annosum) that cause Sand Pine Root Disease. |
| 4823074 |
sand pine root disease |
|
resin leaking from trunk caused by a complex of fungi (Inonotous circinatus, Phytophthora cinnamomi, Phaeolus schweinitzii, Verticicladiella procera, Armillariella tabescens, Heterobasidion annosum). |
| 4823079 |
Phytophthora root rot |
Phytophthora cinnamomi |
Mortality in four year old plantation. |
| 4823085 |
Phytophthora root rot |
Phytophthora cinnamomi |
Mortality of 2-0 bareroot stock in Munson Forest Nursery, Florida, USA. |
| 4823052 |
eastern pine gall rust |
Cronartium quercuum |
Distinct spherical (globose) swelling. The bright yellow spore sacs (aecia) which contain masses of yellow to orange aeciospores form in the spring. |
| 4823081 |
Phytophthora root rot |
Phytophthora cinnamomi |
Mortality of 2-0 stock in Munson Forest Nursery, Florida, USA |
| 4822032 |
Inonotus heartrot |
Inonotus rickii |
Advanced wood decay in branch. Note the distinct, narrow darkened zones of sound wood at the margins of the decayed wood, and the dark mass of sterile hyphae at the branch stub. |
| 4822085 |
Botryosphaeria canker |
Botryosphaeria dothidea |
crown thinning and dieback |
| 4823071 |
sand pine root disease |
|
Resin leakage at base of tree. Caused by a complex of fungi (Inonotus circinatus, Phytophthora cinnamomi, Phaeolus schweinitzii, Verticicladiella procera, Armillariella tabescens, Heterobasidion annosum). |
| 2733033 |
Dutch elm disease |
Ophiostoma ulmi |
Initial flagging (yellowing) of branches in crown. |
| 4822057 |
pitch canker |
Fusarium subglutinans |
Mortality ("flagging") of terminal shoot |
| 4822055 |
pitch canker |
Fusarium subglutinans |
Mortality ("flagging") of infected terminal/branch shoots in mature trees |
| 4823002 |
Armillaria root rot |
Armillaria tabescens |
Infected trees on Jonathan Dickinson State Park, Florida USA |
| 4822099 |
Armillaria root rot |
Armillaria tabescens |
Mycelial felt on base of stem of India Rosewood |
| 4823001 |
Armillaria root rot |
Armillaria tabescens |
Dead trees at Jonathan Dickinson State Park, Florida USA |
| 4823058 |
Lophodermium needle casts |
Lophodermium spp. |
Healthy trees (left), severe infection (center), moderate infection (right). |
| 4823084 |
red root and butt rot |
Inonotus circinatus |
Old growth trees kiled by Inonotus circinatus (Fr.) R.L. Gilbertson. One of the complex of fungi (Inonotus circinatus, Phytophthora cinnamomi, Phaeolus schweinitzii, Verticicladiella procera, Armillariella tabescens, Heterobasidion annosum) that cause Sand Pine Root Disease. |
| 4822082 |
Phytophthora basal canker |
Phytophthora palmivora |
canker initially 30 inches off ground, 6 months later - 11 feet off ground as infection progresses into tree stem and scaffold branches |
| 4822078 |
Phytophthora basal canker |
Phytophthora palmivora |
Droplets of discolored sap exuding from infected bark tissues. |
| 4822086 |
Botryosphaeria canker |
Botryosphaeria dothidea |
advanced symptoms and damage. |
| 4823019 |
Inonotus heartrot |
Inonotus rickii |
Decayed wood in center exhibiting typical yellow-brown to white color and is seperated from sound wood by a distinct zone of dark-stained wood. |
| 4823026 |
bacterial wetwood |
Enterobacter nimipressuralis |
Symptomatic discolored bark. A branch scar is the "source" of the slime flux. |
| 4822095 |
Armillaria root rot |
Armillaria tabescens |
Mycelial white felt on roots, water soaking, "s" zone line |
| 4822100 |
orange hobnail canker |
Cryphonectria gyrosa |
Thinning crown in infected tree where roots are exposed at soil surface from traffic & maintenance. Lake Wales, Florida USA |
| 4822051 |
bacterial leaf scorch |
Xylella fastidiosa |
healthy tree & trees infected with Fastidious xylem-inhabiting bacterium which occludes vascular tissue as it develops in the host. |
| 4823075 |
sand pine root disease |
|
Old growth tree kiled by Inonotus circinatus (Fr.) R.L. Gilbertson. One of the complex of fungi (I. circinatus, Phytophthora cinnamomi, Phaeolus schweinitzii, Verticicladiella procera, Armillariella tabescens, Heterobasidion annosum) that cause Sand Pine Root Disease. |
| 4822087 |
Botryosphaeria canker |
Botryosphaeria dothidea |
note the discoloration on vascular tissue, 3/4 dead. Only the light-colored section is alive. |
| 4822077 |
Phytophthora basal canker |
Phytophthora palmivora |
Basal canker (6 feet off the ground) with dark staining and discoloration of infected bark. Naples, Florida, USA |
| 4824002 |
Phytophthora root rot |
Phytophthora cinnamomi |
Mortality in 13-year old stand. |
| 4822030 |
Inonotus heartrot |
Inonotus rickii |
decay at branch stubs - note sap running |
| 4822083 |
Neonectria canker |
Neonectria galligena |
Burlike galls |
| 4823005 |
Ganoderma root and butt rot |
Ganoderma lucidum |
thinning crown of infected tree |
| 4822096 |
Armillaria root rot |
Armillaria tabescens |
Mycelial felt on roots |
| 4822056 |
pitch canker |
Fusarium subglutinans |
Severe mortality ("flagging") of infected terminal/branch shoots in mature trees |
| 4822001 |
eucalyptus canker |
Cryphonectria cubensis |
canker |
| 4822088 |
Neonectria canker |
Neonectria galligena |
Distinctive "target-like" canker in stem |
| 4824003 |
Phytophthora root rot |
Phytophthora cinnamomi |
Mortality in 4-year old stand |
| 4822046 |
bacterial leaf scorch |
Xylella fastidiosa |
Fastidious xylem-inhabiting bacterium which occludes vascular tissue as it develops in the host. Symptoms characteristically develop from bottom of the tree upward and inside of crown outward. Older leaves will have a "scorched" curled appearance while younger leaves at branch tips will appear healthy. |
| 4824028 |
Diplodia tip blights |
Diplodia spp. |
D. pini. Note resin soaked tissue beneath bark. |
| 4823031 |
brown spot needle blight of pine |
Mycosphaerella dearnessii |
Typical brown spots on infected needles. |
| 4823073 |
sand pine root disease |
|
Resin soaked wood caused by a complex of fungi (Inonotus circinatus, Phytophthora cinnamomi, Phaeolus schweinitzii, Verticicladiella procera, Armillariella tabescens, Heterobasidion annosum). |
| 4823099 |
annosum root disease |
Heterobasidion annosum |
Crown symptoms: Dead trees (left), fading trees (right). |
| 4823098 |
annosum root disease |
Heterobasidion annosum |
White stringy rot ("shredded wheat") indicative of advanced infection. |
| 4822045 |
bacterial leaf scorch |
Xylella fastidiosa |
Fastidious xylem-inhabiting bacterium which occludes vascular tissue as it develops in the host. Symptoms characteristically develop from bottom of the tree upward and inside of crown outward. Older leaves will have a "scorched" curled appearance while younger leaves at branch tips will appear healthy. |
| 4823053 |
eastern pine gall rust |
Cronartium quercuum |
Spherical gall with yellow aecia spore sacs. |
| 4823091 |
annosum root disease |
Heterobasidion annosum |
Stand mortality. |
| 4825016 |
eucalyptus canker |
Cryphonectria cubensis |
Bark fissures on infected trunk. |
| 4822048 |
bacterial leaf scorch |
Xylella fastidiosa |
Fastidious xylem-inhabiting bacterium which occludes vascular tissue as it develops in the host. Symptomatic tree with crown dieback, premature leaf abcission, chlorotic and "scorched" foliage. |
| 4822049 |
bacterial leaf scorch |
Xylella fastidiosa |
Fastidious xylem-inhabiting bacterium which occludes vascular tissue as it develops in the host. Leaves developing "scorched" appearance. |
| 4822097 |
Armillaria root rot |
Armillaria tabescens |
Mycelial felt on roots and water soaking of xylem tissue. |
| 4822025 |
Hypoxylon cankers |
Hypoxylon spp. |
Black canker patches on stem |
| 4822098 |
Armillaria root rot |
Armillaria tabescens |
Mycelial felt on roots and water soaking of xylem tissue. |
| 4822047 |
bacterial leaf scorch |
Xylella fastidiosa |
Fastidious xylem-inhabiting bacterium which occludes vascular tissue as it develops in the host. Symptoms characteristically develop from bottom of the tree upward and inside of crown outward. Older leaves will have a "scorched" curled appearance while younger leaves at branch tips will appear healthy. |
| 4823043 |
pitch canker |
Fusarium subglutinans |
"Flagging" of infected terminal |
| 4822037 |
Inonotus heartrot |
Inonotus rickii |
Sap exudation and associated bark staining at infected branch stub. |
| 4822038 |
Inonotus heartrot |
Inonotus rickii |
decay column in bole |
| 4823057 |
Lophodermium needle casts |
Lophodermium spp. |
Severe infection. |
| 4822080 |
Phytophthora basal canker |
Phytophthora palmivora |
Distinctive coffee-brown or dark rusty reddish-brown to black discoloration of bark. |
| 4824095 |
southern blight |
Sclerotium rolfsii |
Discolored foliage of infected seedlings. |
| 4822079 |
Phytophthora basal canker |
Phytophthora palmivora |
zone line between infected vs. uninfected bark |
| 4824072 |
heat |
|
Groundline heat lesions on young seedlings occur from high groundline temperatures. Damaging groundline temperature is related to ambient air temperature, groundline insolation, soil moisture, and the color of the soil surface. |
| 4824076 |
Fusarium wilts, blights, rots and damping-off |
Fusarium spp. |
Affects lateral (feeder) and tap roots. Tap root may exhibit varying degrees of resin soaking. |
| 4824038 |
charcoal rot |
Macrophomina phaseolina |
Late summer infection with seedlings exhibiting stunted growth, off-color foliage, wilting and/or redding foliage. |
| 4823028 |
brown spot needle blight of pine |
Mycosphaerella dearnessii |
Grass stage seedling damaged by infection. |
| 4822035 |
Inonotus heartrot |
Inonotus rickii |
Stem cross sections showing advanced wood decay. Note the distinct, narrow darkened zones of sound wood at the margins of the decayed wood. |
| 4822042 |
Fusarium root rot and wilt |
Fusarium oxysporum |
Thinning crown of infected tree |
| 4822043 |
Fusarium root rot and wilt |
Fusarium oxysporum |
Distinctive pale to dark brown (sometimes with a purplish hue)staining or discoloration of the xylem. This soil borne fungus enters the roots by direct penetration or through root wounds during transplanting/landscape maintance, or vectored by feeding injury caused by plant parastic nematodes. Once inside a susceptible host, the fungus enters the xylem and colonizes the vascular system restricting water flow. |
| 4822036 |
Inonotus heartrot |
Inonotus rickii |
longitudinal stem section showing advanced wood decay. Note the distinct, narrow darkened zones of sound wood at the margins of the decayed wood.. |
| 4822033 |
Inonotus heartrot |
Inonotus rickii |
Sap exudation ("bleeding")and associated bark staining at infected branch stub. |
| 1361156 |
hispidus canker |
Inonotus hispidus |
large canker |
| 4822062 |
ash rusts |
Puccinia sparganioides |
Leaf distortion, petiole hypertrophy and distinctive pycnia and aecial "cluster cup" with orange-yellow aeciospores proliferating from the surface of infected tissue. |
| 4822071 |
Phomopsis blight |
Phomopsis juniperivora |
characteristic dicoloration (graying) and curling of infected shoot tips |
| 4822050 |
bacterial leaf scorch |
Xylella fastidiosa |
Early leaf symptoms development of Fastidious xylem-inhabiting bacterium which occludes vascular tissue as it develops in the host. |
| 4823036 |
crown gall |
Rhizobium radiobacter |
Gall on stem. Chiefland Forest Nursery, Florida USA |
| 4823040 |
quince rust |
Gymnosporangium clavipes |
|
| 4823046 |
southern cone rust |
Cronartium strobilinum |
Infected swollen first year cone displaying powdery masses of yellow-orange aeciospores |
| 4823047 |
southern cone rust |
Cronartium strobilinum |
Swollen infected first year cones with yellow-orange masses of aeciospores |
| 4823049 |
pitch canker |
Fusarium subglutinans |
resin oozing from infected stem |
| 4824078 |
pitch canker |
Fusarium subglutinans |
Symptomatic wilting of terminal of an infected seedling. |
| 4824079 |
pitch canker |
Fusarium subglutinans |
Terminal wilting and dicoloration of infected seedlings. |
| 4824081 |
pitch canker |
Fusarium subglutinans |
Resinosus of root/stem tissues of infected seedling. |
| 4824082 |
Phytophthora root and crown rots |
Phytophthora spp. |
Infected roots growing in poorly drained nursery beds. |
| 4824083 |
false tinder polypore |
Phellinus igniarius |
And Pythium root disease on seedlings grown in poorly drained nursery beds. |
| 4824084 |
Cylindrocladium root diseases |
Cylindrocladium spp. |
Black microsclerotia fruiting bodies on the roots of infected seedlings. |
| 4824087 |
charcoal rot |
Macrophomina phaseolina |
Marginal leaf necrosis. |
| 4824089 |
pine tip blight |
|
Tip Blight caused by a variety of fungi: Fusarium spp., Lasiodiplodia (Diplodia) spp., Macrophomina phaseolina. Occurs when shoot tips are succlent and rapidly growing. "Blighted" seedlings often recover. |
| 4824091 |
pine tip blight |
|
Tip Blight caused by a variety of fungi: Fusarium spp., Lasiodiplodia (Diplodia) spp., Macrophomina phaseolina. Occurs when shoot tips are succlent and rapidly growing. "Blighted" seedlings often recover. |
| 4824092 |
southern blight |
Sclerotium rolfsii |
Infected seedlings. |
| 4824029 |
seedling blight of longleaf pine |
Ceratobasidium spp. |
Seedlings infected with a binucleate Rhizoctonia-like fungus. (Right to left) Asymptomatic, uninfected; early necrosis of needle bases and slight discoloration of terminal bud tissues; advanced necrosis of needle bases with developing bud necrosis; complete necrosis of terminal bud. |
| 4824033 |
pitch canker |
Fusarium subglutinans |
Infected seedlings: (Right to left) basal swelling at root collar; clump of resin-soaked soil on root collar; resin-soaked root/stem lesion. |
| 4824035 |
pitch canker |
Fusarium subglutinans |
Roots of infected seedling caked with resin & sand. See image 4824036. |
| 4824036 |
pitch canker |
Fusarium subglutinans |
Infected seedling with resin-soaked root xylem. See image 4824035. |
| 4824053 |
charcoal rot |
Macrophomina phaseolina |
Infected seedlings in nursery bed. |
| 4824060 |
seedling blight of longleaf pine |
Ceratobasidium spp. |
A Rhizoctonia solani-like binucleate fungus. Seedling mortality in infection center. |
| 4824061 |
seedling blight of longleaf pine |
Ceratobasidium spp. |
A Rhizoctonia solani-like binucleate fungus. Seedling mortality in infection center. |
| 4824063 |
seedling blight of longleaf pine |
Ceratobasidium spp. |
Seedlings infected with a binucleate Rhizoctonia-like fungus. (Right to left) Asymptomatic, uninfected; early necrosis of needle bases and slight discoloration of terminal bud tissues; advanced necrosis of needle bases with developing bud necrosis; complete necrosis of terminal bud. |
| 4824064 |
Rhizoctonia damping-off, blight and rot |
Rhizoctonia solani |
Loss of lower foliage on infected seedlings. |
| 4824066 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Galls at seedling root-collar. |
| 4824068 |
Phomopsis blight |
Phomopsis juniperivora |
Discolored foliage of infected seedlings. |
| 4824012 |
Cylindrocladium root diseases |
Cylindrocladium spp. |
Damaged seedlings infected with C. floridanum. Lack of aeration as foliage mats (or lays down) down causes disease to spread across tray. |
| 4824013 |
Cylindrocladium root diseases |
Cylindrocladium spp. |
Damaged seedlings infected with C. floridanum. Lack of aeration as foliage mats (or lays down) down causes disease to spread across tray. |
| 4824015 |
Cylindrocladium root diseases |
Cylindrocladium spp. |
Healthy seedling (right) & seedling infected with C. floridanum (left). |
| 4824016 |
seedling blight of longleaf pine |
Ceratobasidium spp. |
A binucleate Rhizoctonia solani-like fungus. Similar to R. solani but with binucleate hyphal cells. Initial symptoms appear as water-soaking and chlorosis of needle bases. |
| 4824023 |
Rhizoctonia damping-off, blight and rot |
Rhizoctonia solani |
Infections occur on seedlings in sandy soils as sand, washed by rain and irrigation ("sand splash"), accumulates at the base of the seedlings, creating a microenvironment of reduced aeration and increased relative humidity which favors infection. |
| 4823086 |
Phytophthora root rot |
Phytophthora cinnamomi |
Healthy tree (left), infected tree (right). |
| 4823088 |
Phytophthora root rot |
Phytophthora cinnamomi |
13-year old trees: Fading tree (left), dead tree (center), healthy treee (right). |
| 4823078 |
Phytophthora root rot |
Phytophthora cinnamomi |
Roots of infected nursery seedlings. Note the lack of short lateral roots and presence of black, necrotic and sloughing cortical tissues. |
| 4823083 |
Phytophthora root rot |
Phytophthora cinnamomi |
Resin-soaked tap root of seedling infected during its first year in the field. |
| 4825027 |
Neonectria canker |
Neonectria galligena |
Hypertrophied bark in crown. |
| 4824073 |
heat |
|
Groundline heat lesion on a young seedling resulting from high groundline temperatures. Damaging groundline temperature is related to ambient air temperature, groundline insolation, soil moisture, and the color of the soil surface. |
| 4824071 |
heat |
|
Groundline heat lesions on young seedlings occur from high groundline temperatures. Damaging groundline temperature is related to ambient air temperature, groundline insolation, soil moisture, and the color of the soil surface. |
| 4824100 |
Cylindrocladium blight and root rot |
Cylindrocladium scoparium |
Girdling stem canker on infected seedlings. (see image 4824099). |
| 4825007 |
eucalyptus canker |
Cryphonectria cubensis |
Bark fissures starting at base of infected tree. Compare with healkthy stem (image 4825006). C. cubensis inhibits coppice ability of infected trees. |
| 4825008 |
eucalyptus canker |
Cryphonectria cubensis |
Initial infection beneath bark. |
| 4825010 |
eucalyptus canker |
Cryphonectria cubensis |
Bark fissuring as canker develops which reduces coppice ability. |
| 4825013 |
eucalyptus canker |
Cryphonectria cubensis |
Failure of 2-year old coppice shoots on infected stump. |
| 4825014 |
eucalyptus canker |
Cryphonectria cubensis |
Infected stump with dying coppice shoots. |
| 4822059 |
pitch canker |
Fusarium subglutinans |
Internal resin impregnation of infected xylem tissue |
| 4824034 |
pitch canker |
Fusarium subglutinans |
Mortality in first year planted stand |
| 4825011 |
eucalyptus canker |
Cryphonectria cubensis |
Advanced canker development. |
| 4825015 |
eucalyptus canker |
Cryphonectria cubensis |
Bark fissures on mature tree. |
| 4823082 |
Phytophthora root rot |
Phytophthora cinnamomi |
Resin caked roots of infected seedlings in the field. |
| 4823044 |
southern cone rust |
Cronartium strobilinum |
Infected first-year conelets swell rapidly by April and are often three to four times larger than disease-free cones. Infected conelet - left, normal conelet - right. |
| 4823037 |
crown gall |
Rhizobium radiobacter |
Gall on stem. Chiefland Forest Nursery, Florida USA |
| 4823045 |
southern cone rust |
Cronartium strobilinum |
Infected first-year conelets swell rapidly by April and are often three to four times larger than disease-free cones. Note bright yellow aeciospores forming on the large infected cone on the right. |
| 4823089 |
Phytophthora root rot |
Phytophthora cinnamomi |
Resin soaked tissue. |
| 4824086 |
Pythium diseases |
Pythium spp. |
Scorched leaves of infected seedlings. |
| 4824055 |
charcoal rot |
Macrophomina phaseolina |
Off-colered foliage of infected seedling. |
| 4824062 |
Rhizoctonia damping-off, blight and rot |
Rhizoctonia solani |
Wilted and discolored infected seedlings. |
| 4824069 |
brown spot needle blight of pine |
Mycosphaerella dearnessii |
Initial infection spot developing in nursery bed. |
| 4824074 |
Botryosphaeria canker |
Botryosphaeria dothidea |
Infected seedlings with dark fruiting bodies on lower stem/root-collar (three seedlings on right), uninfected (three seedlings on left). |
| 4823035 |
crown gall |
Rhizobium radiobacter |
gall on seedling stem. Chiefland Forest Nursery, Florida USA |
| 4823087 |
Phytophthora root rot |
Phytophthora cinnamomi |
Yellowing foliage of infected tree. |
| 4824037 |
pitch canker |
Fusarium subglutinans |
"Flagging" or dieback of terminal shoots of infected seedlings. |
| 4824065 |
Rhizoctonia damping-off, blight and rot |
Rhizoctonia solani |
Foliage discoloration and loss on infected seedling. |
| 4824085 |
Cylindrocladium root diseases |
Cylindrocladium spp. |
Black microsclerotia fruiting bodies on the roots of infected seedlings. |
| 4824093 |
southern blight |
Sclerotium rolfsii |
Infected seedlings. |
| 4825006 |
eucalyptus canker |
Cryphonectria cubensis |
Healthy stem, contrast to infected stem (image 4825007). |
| 4825009 |
eucalyptus canker |
Cryphonectria cubensis |
Advanced bark fissuring from infection which reduces coppice ability. |
| 4824054 |
charcoal rot |
Macrophomina phaseolina |
Wilting and reddening foliage of infected seedlings. |
| 4824067 |
Phomopsis blight |
Phomopsis juniperivora |
Infected seedlings in nursery bed. |
| 4824088 |
root-knot nematode |
Meloidogyne incognita |
Galls on roots of parasitized seedling. |
| 4825003 |
heat |
|
Heat lesions girdling lower stem. Note swelling of stem above lesions resulting from obstructed flow of carbohydrates through damaged phloem. |
| 4825030 |
Leptographium root disease |
Leptographium procerum |
Resin-soaking/staining root. Associated with insect injury |
| 4823048 |
southern cone rust |
Cronartium strobilinum |
infected cone with yellow-orange aeciospore masses (top) and normal green cone (bottom) |
| 4823030 |
brown spot needle blight of pine |
Mycosphaerella dearnessii |
severe infection |
| 4823042 |
juniper witches' broom rust |
Gymnosporangium nidus avis |
Swelling and telia sporulation on infected branch. |
| 4823077 |
Phytophthora root rot |
Phytophthora cinnamomi |
Mortality of first-year seedlings in Munson Forest Nursery, Florida, USA |
| 4823095 |
annosum root disease |
Heterobasidion annosum |
Resin-soaked root xylem. |
| 2733034 |
Dutch elm disease |
Ophiostoma ulmi |
small stem split to show vascular discoloration. |
