Bacterial fireblight occurs only on plants in the ros

1
For disease to occur which of the following are
necessary?

• A. A virulent pathogen.
• B. An environment conducive to disease
  development.
• C. A susceptible host plant.
• D. All three are necessary
• for disease to occur.

2
Who said that, The only cure for cabbage hernia
is fire?
3
True or False.
To control diseases with fungicides, applications
must be made before the fungus enters plant
tissue.
4
Which of the following is not a plant pathogen?

• A. Fungus (pl. fungi)
• B. Bacterium (pl. bacteria)
• C. Virus (pl. viruses)
• D. Aphid (pl. aphids)
• E. Nematode (pl. nematodes)

5
Are there plant pathogens in each of the five
kingdoms of life on earth?

• A. Animals
• B. Plants
• C. Monera (Bacteria)
• D. Protista
• E. Fungi

6
Which of the following are ways that fungi and
bacteria spread?

• A. Contaminated seed
• B. Wind-blown rain
• C. Pruning shears
• D. Animals
• E. All of the above

7
Who said, Broccoli is just cabbage with a
college education?
8
Which of the following crabapples have good
resistance to apple scab?
Which of the following diseases is caused by the
same fungus that causes powdery mildew of rose?

• A. Prairifire
• B. Bob White
• C. Red Jewel
• D. Dolgo
• E. All of the above

9
True or False.
Bacterial fireblight occurs only on plants in the
rose family (Rosaceae).
10
Which of the following diseases is caused by the
same fungus that causes powdery mildew of rose?

• A. Powdery mildew of bluegrass.
• B. Powdery mildew of lilac.
• C. Powdery mildew of zinnia.
• D. All of the above.
• E. None of the above.

11
True or False.
Prior to World War II, rose black spot was worse
than powdery mildew on greenhouse-grown roses
after World War II, powdery mildew was worse than
black spot.
12
Which of the following are helpful in controlling
black spot of roses?

• A. Avoiding overhead irrigation, to the extent
  possible.
• B. Plant in a sunny location.
• C. Enhance air movement by weeding and pruning
  surrounding vegetation.
• D. Use resistant varieties.
• E. Use preventive fungicides.
• F. All of the above.

13
Taxus (yew) does not thrive in overly wet,
poorly-drained soil. Is this because its roots
become unhealthy in such soils or because the wet
soils are ideal for certain plant pathogens, such
as water mold fungi?
14
What does Parvis e glandibus quercus mean?