GLOSSARY

Canker
a disease symptom on woody stems or trunks. Resembles an open break or wound and often persists from year to year.

Captan

Carboxin

Conidium (pl. conidia)
asexual spore of a fungus

Dieback
plant disease symptom where one or more individual stems or branches start to die at the tip, with the disease spreading down toward the base of the stem.

Dormancy
"resting" period when growth slows almost to a halt; usually occurs during the dry or cold season of the year.

Fungicide
chemical used to control fungal diseases. Despite the name, most fungicides only slow down or prevent the spread of disease; only a few actually kill the fungus.

Latent period
the time period between when a plant becomes infected and when it is capable of transmitting the disease to other plants or to a vector

Longitudinal
along the long axis of an organism or object

Metalaxyl

Necrosis
death of a plant tissue (leaf, stem, root) or of a part thereof

PCNB

Primary inoculum
the source of a pathogen when it first appears during the growing season

Pycnidium (pl. pycnidia)
a tiny, dark, round fruiting body of a fungus. Produces conidia.

Seta (pl. setae)
hairs or whiskers in the spore-bearing structures of certain fungi

Stratified sample
a sample taken by first dividing the population (e.g. a field) into subsections, then taking samples within each subsection

Succulent
plant growth that is green and soft, not woody

Thiram

Vascular
of or pertaining to the conductive tissues of a plant stem. These tiny tubes move water up from the roots, and sugars and other materials down from the leaves.

Vector
a plant or animal, often an insect, that carries disease organisms

Last update to this web page on 06 May 1996 by M.J. Munster.