Hypertrophy: enlargement or overgrowth due to abnormal increase in sizes of cells.
Incidence: the proportion of damaged or affected trees within a stand or area.
Lethal canker: an infection located on or within 15 cm of the stem (not prunable) or one located within 60 cm of the stem if no treatment is planned.
Non-lethal canker: an infection located more than 15 cm from the stem and, therefore, prunable.
Pathogen: any agent, whether a living organism or abiotic agent, that induces disease.
Risk: the probability and expected severity of damage as determined by a function composed of host susceptibility, suitable environmental conditions (both combined equate to hazard), plus pathogen proximity, abundance, and virulence.
Signs: visible portion of a pathogen, or its products, seen on or in the host plant.
Stand dynamics: the study of changes in forest stand structure over time, including stand behavior during and after disturbance.
Symptoms: visible reaction of the host plant to infection, disease, or other pest attack.
Walkthrough: initial reconnaissance of an area used to make a preliminary assessment of site conditions and suitability for further surveys or activities.