Phytopathology is the study of plant diseases. It is a multi-disciplinary since prerequisites for disease development are the presence of a susceptible host species, a pathogen and the appropriate environmental conditions. This is known as the disease triangle. Because of this interaction, the terminology used in phytopathology often comes from other disciplines including those dealing with the host species ( botany / plant science, plant physiology), the pathogen ( bacteriology, mycology, nematology, virology), the environment and disease management practices (agronomy, soil science, meteorology, environmental science, ecology, plant breeding, pesticides, entomology), and areas of study that apply to both the host and pathogen (molecular biology, genetics, molecular genetics). The result is that most phytopathological glossary include terms from these other disciplines in addition to terms (disease incidence, horizontal resistance, gene-for-gene relationship, blast, scab and so on) that are specific to, or which have a unique meaning in phytopathology. This glossary is no exception. However, for the sake of brevity, it has for the most part, restricted terms from other disciplines to those that pertain to the pathogen. At some point, these terms should be moved to other glossaries (e.g. glossary of mycology, glossary of nematology, and so on).
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.
race non-specific resistance (syn. general resistance, horizontal resistance)
resistant (n. resistance)
saprobe (syn. saprophyte)
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.
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.
seta (pl. setae)
single gene resistance (syn. monogenic resistance)
slime molds (syn. Myxomycetes)
sorus (pl. sori)
sp. (abbr. for species; pl. spp.)
specific resistance (syn. vertical resistance)
spermagonium (pl. spermagonia; syn. pycnium for rust fungi)
spermatium (pl. spermatia; syn. pycniospore for rust fungi)
spiroplasma - helical, motile, cell wall-less bacterium; member of genus Spiroplasma in class Mollicutes
sporangium (pl. sporangia)
spore-bearing fruiting body
sterigma (pl. sterigmata)
sterilization (adj. sterilized)
striate (n. striations)
stroma (pl. stromata)
stylet knob (syn. basal knob)
stylet-borne transmission (syn. nonpersistent
sunscald or sunburn
susceptible (n. susceptibility)
syncytium (pl. syncytia)
synergism (adj. synergistic)
synnema (pl. synnemata; syn. coremium)
systemic acquired resistance (SAR)
teleomorph (syn. perfect state)
teliospore (sometimes called teleutospore, teleutosporodesm)
Teliospore (sometimes called teleutospore) is the thick-walled resting spore of some fungi (rusts and smuts), from which the basidium arises.
telium (pl. telia)
tolerance (adj. tolerant)
transmit (n. transmission)
transmit (n. transmission)
tumor (syn. gall)
urediniospore (also urediospore, uredospore)
uredinium (also uredium; pl. uredinia)
vascular wilt disease
vertical resistance (syn. specific resistance)
viable (n. viability)
virus-laden, usually applied to insects or nematodes as vectors
A virus is a microscopic particle (ranging in size from 20 - 300 nm) that can infect the cells of a biological organism.
white rot (of wood)
XLB (xylem-limited fastidious bacteria)
xylem-limited fastidious bacteria (XLB)
A zoospore is a motile asexual spore utilizing a flagellum for locomotion.
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.
Illustrated Glossary of Plant Pathology, American Phytopathological Society
Plant Disease Control Glossary, Oregon State University
Mycological Glossary, Illinois Mycological Association
On-Line Glossary of Technical Terms in Plant Pathology, Cornell University (with pronunciation guide)