1. PLPA 100 JEOPARDY 100 200 300 400 500 Fungi Nematode Viruses Abiotic
Bacteria
Fungi
Nematode
Viruses
Abiotic
Plants
Misc.
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500
Darin Eastburn

2. The most common sign of a bacterial infection of plants
What is bacterial ooze?

3. The method bacterial use to multiply
What is binary fission?

4. Most plant pathogenic bacteria belong to this group (shape, etc.)
What are gram negative rods?

5. What is seed transmission?
A common method of overwintering and dissemination used by many plant pathogenic bacteria
What is seed transmission?

6. The bacterial pathogen that causes fire blight of apples and pears
What is Ewinia amylovora?

7. Claviceps purpurea, the cause of ergot of rye, overwinters as this fungal structure
What is a sclerotium?

8. A rust life cycle that involves two different host plants
What is heteroecious?

9. What is coenocytic hyphae?
The type of hyphae, found in Oomycetes, which lacks any cross walls or septations
What is coenocytic hyphae?

10. What are sanitation, fungicides, and host resistance, (or biocontrol)?
These three control strategies are used to help manage Dutch elm disease
What are sanitation, fungicides, and host resistance, (or biocontrol)?

11. The two species of fungi that can cause Dutch elm disease
What are Ophiostoma ulmi and O. novo-ulmi ?

12. Most plant parasitic nematodes feed on these plant parts
What are roots?

13. The soybean cyst nematode it believed to originate in this part of the world
What is Asia?

14. All plant parasitic nematodes and plant viruses are in this group
What are obligate parasites?

15. Two common symptoms of infection by root colonizing nematodes
What are yellowing and stunting?

16. What is a migratory, endoparasite?
A plant parasitic nematode that continues to move within the plants tissue to find new feeding sites
What is a migratory, endoparasite?

17. The most common insect vectors of plant viruses
What are aphids?

18. The term commonly used for the process of virus reproduction
What is replication?

19. The most widely used method for detecting plant viruses
What is ELISA?

20. Most plant viruses have this type of nucleic acid
What is RNA?

21. What are acquisition, transmission, and retentions times?
Three characteristics that distinguish persistant and non-persistant forms of virus transmission
What are acquisition, transmission, and retentions times?

22. This soil property affects the amount and type of nutrients available to plants
What is soil pH?

23. These two air pollutants undergo chemical reactions in the atmosphere and produce acid rain
What are SO2 and NOX?

24. A change in plant health or normal function as a result of an instantaneous interaction with an external factor
What is an injury?

25. Three ways that herbicide injury can occur
What are tank contamination, drift, and carry over ?

26. Three characteristics of abiotic diseases that can help distinguish them from biotic disease
What are affecting multiple species, uniform appearance, and patterns of distribution ?

27. The aecial host of black stem rust
What is barberry?

28. The part of the world in which apples originated
What is the Middle East?

29. The vascular tissue in a plant through which sugars are transported
What is phloem?

30. Structures on soybean plants that contain bacteria which convert atmospheric nitrogen to fixed nitrogen
What are root nodules?

31. What is secondary xylem?
The type of tissue that is present in woody plants, but not herbacious plants
What is secondary xylem?

32. What is corn smut? (caused by Ustilago maydis)
A fungal disease that is also harvested as a gastronomic delicacy in Mexico and parts of the U.S.
What is corn smut?
(caused by Ustilago maydis)

33. A type of phytoplasma that has a spiral or helical shape
What is a spiroplasma?

34. These pathogens differ from viruses in that they lack a protein coat, their nucleic acids do not include any genes, and they are not vectored by insects
What are viroids?

35. A type of plant disease cycle in which the amount of disease is not related to the rate of spread during the season
What is a monocyclic?

36. Three strategies used to prevent ergot and egrotism
What are planting disease free seed, mowing, and early harvest?