PLPA 100 JEOPARDY

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PLPA 100 JEOPARDY
Darin Eastburn
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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
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
The type of hyphae, found in Oomycetes, which
lacks any cross walls or septations

• What is coenocytic hyphae?

10
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?

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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?

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The most widely used method for detecting plant
viruses

• What is ELISA?

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Most plant viruses have this type of nucleic acid

• What is RNA?

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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 ?

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The aecial host of black stem rust

• What is barberry?

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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?

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The type of tissue that is present in woody
plants, but not herbacious plants

• What is secondary xylem?

32
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)

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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?