Term
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Definition
| Result of interaction between the host and the pathogen |
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Term
| distinguish between "pathogen" and "disease" |
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Definition
| Pathogen is the cause of the disease |
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Term
| signs vs symptoms of disease |
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Definition
Signs: pathogen and its parts seen on a plant
Symptoms: external and internal reactions of a plant as the result of a disease |
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Term
| A-biotic factors of plant disease |
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Definition
herbicide injury, excess/deficiency of wind soil or water
Non Living Factors |
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Term
| Biotic factors of disease |
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Definition
living organisms that directly affect the health of a plant
Pathogen or parasites |
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Term
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Definition
| can only grow/reproduce on living host |
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Term
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Definition
| parasites taht can live as a saprophyte for a short time |
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Term
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Definition
| saprophyte that can cause disease |
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Term
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Definition
| any organism that lives on dead organic matter, as certain fungi and bacteria. |
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Term
| 3 components of disease triangle |
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Definition
Pathogen: total of virulnce, abundance of the pathogen
Environment: total of conditions favoring the disease
Host: total of conditions favoring susceptibility |
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Term
| 5 components of disease cycle |
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Definition
Inoculation
Penetration
Colonization
Dissemination
Overwintering |
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Term
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Definition
| single disease cycle within one year |
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Term
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Definition
| multiple cycles within a year |
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Term
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Definition
| reproductive unit of fungi |
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Term
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Definition
| swollen tip of hyphae or germ tube that facilitates attachment and penetration of a host |
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Term
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Definition
spore bearing flagella
capable of moving through water |
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Term
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Definition
| sexual spore produced by the union of two morphologically different gametangia (oogonium and antheridium) |
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Term
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Definition
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Term
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Definition
| male sexual organ found in some fungi |
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Term
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Definition
| sexual resting spore of zygomycetes produced by the fusion of morphogically similar gametangia |
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Term
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Definition
| singel branch of mycelium |
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Term
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Definition
| a container or case of asexual spores, sometimes functions as a single spore |
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Term
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Definition
| specialized hyphae bearing one or more sporangia |
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Term
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Definition
| simple branched projection of hyphae into host cells that acts as absorbing organ |
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Term
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Definition
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Term
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Definition
| open cup or saucer shaped ascocarp pf some ascomycetes |
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Term
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Definition
| globular or flask shaped ascocarp of pyrenomycetes |
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Term
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Definition
Downey Mildew of Lettuce
Sexual structures: oogonium, antheridium
Asexual structures:sporangium
Resistant survival stage: oospores
Environmental conditions:moist leaves
Signs symptoms: Chlorotic patches, white spores on leaf underside, downey appearance
Ooomycete |
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Term
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Definition
Late blight Potato
Sexual structures: oogonium, antheridium
Asexual structures:sporangium
Resistant survival stage: zoospores, sporangia
Environmental conditions: wet cool conditions
Signs symptoms: water soaked spots, downey mildew growth, on leaves tubers, lesions
Oomycete |
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Term
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Definition
Damping off
Sexual structures: oogonium, antheridium
Asexual structures: sporangium
Resistant survival stage: oospores
Environmental conditions: poorl drained soil
Signs symptoms: disintigrating plant, stunted growth seedlings, fall over
Oomycete |
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Term
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Definition
Black Wort Potato
Sexual structures: zygotes
Asexual structures: sporangia, zoospores
Resistant survival stage: resting spores, irregularly shaped thallus
Environmental conditions: wet soils and cool temperatures
Signs symptoms: spongy brown tubers, cauliflower growths
ascomycete |
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Term
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Definition
Rhizopus fruit rot
Sexual structures: hyphae
Asexual structures: sporangiophores
Resistant survival stage: zygospores
Environmental conditions: wounds on tubers
Signs symptoms: water soaked, loss of moisture, hyphae growth
ascomycete |
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Term
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Definition
powder mildew, grape
Sexual structures: chasmothecia, ascogonium, antheridium
Asexual structures: conidium, conidiophores
Resistant survival stage: cleistothecia
Environmental conditions:high humidity
Signs symptoms: white powdery fungus on leaves
ascomycete |
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Term
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Definition
Peach leaf curl
Sexual structures: ascospores
Asexual structures: conidia
Resistant survival stage: ascospores
Environmental conditions: leaf wetness
Signs symptoms: puckered leaves, reddish tinge, white fruit blisters
ascomycete |
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Term
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Definition
Septoria blotch wheat
Sexual structures: ascospores in asci in perithecium
Asexual structures: conidia
Resistant survival stage: mycelium or perithecia
Environmental conditions: late spring rains
Signs symptoms: yellow flecks that turn brown, irrgular blotches
ascomycete |
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Term
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Definition
black mold totamato
Sexual structures: none
Asexual structures: conidia
Resistant survival stage: mycelium, conidia
Environmental conditions: high humidity
Signs symptoms: damping off seedlings, stem and fruit rot, dark sunken spots, black mold |
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Term
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Definition
Anthracnose
Sexual structures: ascospores
Asexual structures: conidia
Resistant survival stage: conidia
Environmental conditions: poorly drained soil
Signs symptoms: rotten area of fruit, cankers on stems
ascomycete |
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Term
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Definition
chestnut blight
Sexual structures: perithecia
Asexual structures: conidia
Resistant survival stage: conidia ascospores
Environmental conditions: cool areas, near creeks
Signs symptoms: canker forming in circular patter around trunk
ascomycete |
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Term
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Definition
Brown Rot
Sexual structures: apothecium with asci
Asexual structures: conidia
Resistant survival stage: mycelium, fruit mummies
Environmental conditions:
ascomycete |
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Term
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Definition
apple scab
Sexual structures: ascospores in perithecium
Asexual structures: conidia
Resistant survival stage: perithecia
ascomycetes
Signs symptoms: |
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Term
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Definition
lettuce drop
Sexual structures: apothecium
Asexual structures: sclerotia
Resistant survival stage: ascospores |
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Term
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Definition
grey mold
Sexual structures: none
Asexual structures: conidia
Resistant survival stage: |
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Term
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Definition
| toxins produced by pathogenic and spoilage fungi in food products |
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Term
| 3 genera of fungi responsible for mycotoxins |
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Definition
aspergillus
fusarium
penicillium |
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Term
| crops containing mycotoxins |
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Definition
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Term
| strategies to reduce mycotoxins |
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Definition
post harvest sorting
control fusarium and aspergillus diseases
avoid plant stresss
low moisture |
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Term
| crops most susceptible to post harvest diseases |
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Definition
| tender, succulent, high water content |
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Term
| post harvest disease fungi |
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Definition
alternaria
rhizopus
sclerotinia |
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Term
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Definition
White Pine blister rust
Basidiomycete
sexual structures:
asexual structures:
resistant stage:
cycle:
Uredium>Telia>Basidia>Spermagonia>Aecia |
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Term
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Definition
Stem Rust Wheat
Basidiomycete
Sexual Structures: teliospore
Asexual Structures: aeciospore
Resistant survival stage:teliospore
cycle:
Basidia>Spermagonia>Aecia>Uredia>Telia |
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Term
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Definition
Covered Smut Wheat
Basidiomycete
Sexual Structures: Teliospore
Asexual Structures: basidium
Resistant survival stage:mycelium in kernals
cycle:
mycelium>teliospores>basidium>sporidium>mycelium |
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Term
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Definition
Loose Smut barley
Basidiomycete
Sexual Structures: teliospore
Asexual Structures: basidium
Resistant survival stage: mycelium in kernals
cycle:
mycelium>teliospore>basidiospore>mycelium |
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Term
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Definition
Oak root Fungus
Basidiomycete
Sexual Structures: basidiospore
Asexual Structures: none
Resistant survival stage: mycelium
cycle:
mycelium>rhizomorph>mushrooms>basidiocarp |
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Term
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Definition
damping off, soreshin
fungi imperfecti
Sexual Structures:none
Asexual Structures: none
Resistant survival stage: mycelium, sclerotia
cycle:
mycelium>sclerotia |
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Term
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Definition
southern blight
fungi imperfecti
Sexual Structures:
Asexual Structures:
Resistant survival stage:
cycle: |
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Term
|
Definition
rod shaped
.-6-3.5 mm
slime layer
capsule
flagella |
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Term
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Definition
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Term
|
Definition
self replicating hereditary circular DNA found in certain fungi/bacteria
not required for survival |
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Term
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Definition
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