Plant Pathology

2. an organism that causes disease in another organism
7. gradual reduction in health and vigor as a tree is in the process of dying slowly
9. dead apical parts, usually twigs or limbs; dying from the outside in
10. a specialized thread or cord-like structure made up of hyphae with a protective covering
13. the process or a result of a pathogen establishing itself on or within a host
14. woody healing tissue that attempts to grow over wounds or otherwise damaged tissue
15. characteristic of a beneficial relationship between two organisms of different species
16. an abnormal proliferation of branches or twigs on a single branch

1. the collective mass of vegetative elements or hyphae of a fungus
3. a decay restricted to the heartwood
4. decomposition of wood or other other substrate by a microorganism
5. premature removal of foliage
6. non-living factors such as temperature, moisture and wind
7. a prolonged disturbance of the normal form or function of a tree or its parts
8. large-scale, temporary increase in population
11. abnormal proliferation of plant tissue stimulated by insects, pathogens, or abiotic influences
12. the expression of disease or injury by the host plant
14. large, often bracket-like fruiting bodies of wood-consuming fungi
15. a microscopic reproductive cell capable of dispersing