fbs 59

1. An organism that can live and multiply only on another living organism.
7. A plant that is invaded by a parasite and from which the parasite obtains its nutrients.
8. “Burning” of leaf margins as a result of infection or unfavorable environmental conditions
10. a type of hyphae Having cross walls
12. The degree of pathogenicity of a given pathogen.
14. A gelatin-like material obtained from seaweed and used to prepare culture media on which microorganisms are grown and studied.
15. A disease increase in a population; usually a widespread and severe outbreak of a disease.
17. A mutually beneficial association of two or more different kinds of organisms
19. Generally microscopic, worm-like animals that live saprophytically in water or soil, or as parasites of plants and animals.
20. Progressive death of shoots, branches, and roots, generally starting at the tip.
22. The ability of a plant to sustain the effects of a disease without dying or suffering serious injury or crop loss
24. The capability of a pathogen to cause disease.
27. Any plant that can be attacked by a given pathogen; a host plant.
29. The hypha or mass of hyphae that make up the body of a fungus.
30. The pathogen or its parts that can cause infection; that portion of individual pathogens that are brought into contact with the host.

2. A disease giving a “rusty” appearance to a plant and caused by one of the Uredinales
3. An entity that can incite disease.
4. Cannot be infected by a given pathogen
5. A disease characterized by general and rapid killing of leaves, flowers, and stems.
6. Short, bunchy habit of plant growth
9. A necrotic, often sunken, lesion on a stem, branch, or twig of a plant.
10. The pathogen or its parts or products seen on a host plant.
11. An organism living on or in another living organism (host) and obtaining its food from the latter.
13. A disease that is caused by an abiotic agent, i.e., by an environmental factor, not by a pathogen.
16. A symbiotic association of a fungus with the roots of a plant.
18. A swelling or overgrowth produced on a plant as a result of infection by certain pathogens.
21. An animal able to transmit a pathogen.
23. The reproductive unit of fungi consisting of one or more cells; in function, it is analogous to the seed of green plants.
25. The separation of a pathogen from its host and its culture on a nutrient medium.
26. Any malfunctioning of host cells and tissues that results from continuous irritation by a pathogenic agent or environmental factor and leads to development of symptoms
28. The external and internal reactions or alterations of a plant as a result of a disease