The acervulus is an erumpent, cushionlike fruiting body bearing conidiophores, conidia, and sometimes setae. It is distinguished from a stroma in not having a peridium or covering of fungal tissue of any kind.
AUDPC (abbr. for Area Under Disease Progress Curve)
autotroph
avirulence (avr) gene
avirulent (syn. nonpathogenic)
axenic
autoecious
B
bacilliform
bacterial streaming
bactericide
bacteriocin
bacteriophage
bacterium (pl. bacteria)
bactericide
basal knob (syn. stylet knob)
basidiocarp (syn. basidioma)
Basidiomyctes
The Division Basidiomycota is a large taxon within the Kingdom Fungi that includes those species that produce spores in a club-shaped structure called a basidium.
basidiospore
basidium (pl. basidia)
basidiospore
basidium (pl. basidia; adj. basidial)
binary fission
binucleate
bioassay
biocide
biocontrol (syn. biological control)
biotic
A disease caused by a living organism
biotroph (syn. obligate parasite)
biotype
bitunicate
blasting
blight
blotch
breaking
broadcast application
brooming
brown rot (of wood)
burn
bursa
C
canker
capsid (syn. coat protein)
carcinogen
carrier
casting
causal agent
certification
cfu (abbr. for colony forming unit)
chemotaxis (syn. chemotropism)
chemotherapy
chlamydospore
chlamydospore
A chlamydospore is the thick-walled big resting spore of several kinds of fungi.
hypovirulence is reduced virulence of a pathogen. Hypovirulence in fungi can be caused by a virus within the fungus. The virus reduces virulence and sporulation. A hypovirus-fungus can be used in biological control.
klendusity The disease-escaping ability of plants.
Koch's postulates
knot
L
latent infection
latent period
leaf dip
leaf spot
leafroll
lesion
life cycle
lignification
local lesion
local necrosis
lodge
M
macerate
macroconidium (pl. macroconidia)
macrocyclic
macronutrient
mantle (syn. hyphal sheath)
mating types
mechanical injury
mechanical transmission
medium (pl. media)
melanin
microbial
microclimate
microconidium (pl. microconidia)
microcyclic
microflora
micronutrient
microorganism (syn. microbe)
microsclerotium
mildew
MLO (syn. mycoplasmalike organism)
mold
mollicute
monocyclic
monoecious
monogenic
monogenic resistance (syn. single gene resistance)
monotrichous
monoxenic culture
mosaic
motile
mottle
movement protein
multigenic resistance (syn. polygenic resistance)
multiline
multinucleate
multiparticulate virus
multipartite virus
multiseptate
mummification
mummy
mushroom
mutagen
Mycelia sterilia
mycelium (pl. mycelia)
Mycelium is the vegetative part of a fungus consisting of a mass of branching, threadlike hyphae that exists below the ground or within another substrate.
A saprotroph (or saprobe) is an organism that obtains its nutrients from non-living organic matter, usually dead and decaying plant or animal matter, by absorbing soluble organic compounds.
scab
scald
sclerenchyma (adj. sclerenchymatous)
sclerotium (pl. sclerotia)
A sclerotium is a compact mass of hardened mycelium (as an ergot) stored with reserve food material that in some higher fungi becomes detached and remains dormant until a favorable opportunity for growth occurs.
scorch
secondary infection
secondary inoculum
secondary metabolite
secondary organism
seed treatment
seedborne
selective medium
septate
serrate
sessile
seta (pl. setae)
sexual spore
sexually compatible
shot-hole
sign
single gene resistance (syn. monogenic resistance)
slime molds (syn. Myxomycetes)
smut
soft rot
soil drench
soilborne
soil pasteurization
soil sterilization
solarization
sooty mold
sorus (pl. sori)
sp. (abbr. for species; pl. spp.)
species
specific resistance (syn. vertical resistance)
spermagonium (pl. spermagonia; syn. pycnium for rust fungi)
spermatium (pl. spermatia; syn. pycniospore for rust fungi)
spicule
spiroplasma – helical, motile, cell wall-less bacterium; member of genus Spiroplasma in class Mollicutes
A zoospore is a motile asexual spore utilizing a flagellum for locomotion.
Zygomycetes
zygospore
A zygospore is a sexual part of a fungus, a chlamydospore that is created by the nuclear fusion of haploid hyphae of different mating types.
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Botrytis cinerea is a necrotrophic fungus that affects many plant species, although its most notable hosts may be wine grapes. In viticulture, it is commonly known as "botrytis bunch rot"; in horticulture, it is usually called "grey mould" or "gray mold".
Powdery mildew is a fungal disease that affects a wide range of plants. Powdery mildew diseases are caused by many different species of ascomycete fungi in the order Erysiphales. Powdery mildew is one of the easier plant diseases to identify, as its symptoms are quite distinctive. Infected plants display white powdery spots on the leaves and stems. The lower leaves are the most affected, but the mildew can appear on any above-ground part of the plant. As the disease progresses, the spots get larger and denser as large numbers of asexual spores are formed, and the mildew may spread up and down the length of the plant.
Black sigatoka is a leaf-spot disease of banana plants caused by the ascomycete fungus Mycosphaerella fijiensis (Morelet), also known as black leaf streak. It was discovered in 1963 and named for its similarities with yellow Sigatoka, which is caused by Mycosphaerella musicola (Mulder), which was itself named after the Sigatoka Valley in Fiji. In the same valley an outbreak of this disease reached epidemic proportions from 1912 to 1923.
Fusarium wilt is a common vascular wilt fungal disease, exhibiting symptoms similar to Verticillium wilt. This disease has been investigated extensively since the early years of this century. The pathogen that causes Fusarium wilt is Fusarium oxysporum. The species is further divided into formae speciales based on host plant.
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Apple scab is a common disease of plants in the rose family (Rosaceae) that is caused by the ascomycete fungus Venturia inaequalis. While this disease affects several plant genera, including Sorbus, Cotoneaster, and Pyrus, it is most commonly associated with the infection of Malus trees, including species of flowering crabapple, as well as cultivated apple. The first symptoms of this disease are found in the foliage, blossoms, and developing fruits of affected trees, which develop dark, irregularly-shaped lesions upon infection. Although apple scab rarely kills its host, infection typically leads to fruit deformation and premature leaf and fruit drop, which enhance the susceptibility of the host plant to abiotic stress and secondary infection. The reduction of fruit quality and yield may result in crop losses of up to 70%, posing a significant threat to the profitability of apple producers. To reduce scab-related yield losses, growers often combine preventive practices, including sanitation and resistance breeding, with reactive measures, such as targeted fungicide or biocontrol treatments, to prevent the incidence and spread of apple scab in their crops.
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Zymoseptoria tritici, synonyms Septoria tritici, Mycosphaerella graminicola, is a species of filamentous fungus, an ascomycete in the family Mycosphaerellaceae. It is a wheat plant pathogen causing septoria leaf blotch that is difficult to control due to resistance to multiple fungicides. The pathogen today causes one of the most important diseases of wheat.
Peronospora manshurica is a plant pathogen. It is a widespread disease on the leaves of soybeans and other crop plants. The fungi is commonly referred to as downy mildew, "leafspot", or "leaf-spot".
Phytophthora megakarya is an oomycete plant pathogen that causes black pod disease in cocoa trees in west and central Africa. This pathogen can cause detrimental loss of yield in the economically important cocoa industry, worth approximately $70 billion annually. It can damage any part of the tree, causing total yield losses which can easily reach 20-25%. A mixture of chemical and cultural controls, as well as choosing resistant plant varieties, are often necessary to control this pathogen.
Sporisorium reilianum Langdon & Full., (1978), previously known as Sphacelotheca reiliana, and Sporisorium reilianum, is a species of biotrophic fungus in the family Ustilaginaceae. It is a plant pathogen that infects maize and sorghum.
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Botrytis fabae is a plant pathogen, a fungus that causes chocolate spot disease of broad or fava bean plants, Vicia faba. It was described scientifically by Mexican-born Galician microbiologist Juan Rodríguez Sardiña in 1929.
Peach scab, also known as peach freckles, is a disease of stone fruits caused by the fungi Cladosporium carpophilum. The disease is most prevalent in wet and warm areas especially southern part of the U.S. as the fungi require rain and wind for dispersal. The fungus causes scabbing, lesions, and defoliating on twig, fruit, and leaf resulting in downgrade of peach quality or loss of fruits due to rotting in severe cases.
Black pod disease is a fungal disease of Cocoa trees. This pathogen if left untreated can destroy all yields; annually the pathogen can cause a yield loss of up to 1/3 and up to 10% of total trees can be lost completely.
Gnomoniopsis castaneae is a fungus of the order Diaporthales that is the most important cause of brown chestnut rot, an emerging disease that damages the fruit of chestnuts. It also causes cankers and necrosis on leaves and on chestnut galls caused by the gall wasp, Dryocosmus kuriphilus. Additionally, it can cause cankers on other chestnut species, red oak, hazelnut trees, less severe damage to some nut trees, and lives as an endophyte on other nut trees. The disease has been reported in Europe, Oceania, and has recently been found in North America; for this reason, the fungus is considered a potential threat to the reintroduction of the American chestnut.
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