Question Set 8 for the CEU Series

Below is Question Set 8 for the CEU article "Taking Down Disease.” from the article’s author: Alicia Whidden, Hillsborough County Extension Service, 5339 CR 579, Seffner, FL 33584; phone: 813-744-5519 ext. 134.

Submit your answers to Question Set 8, along with your license number, to be graded. If you answer enough questions correctly, you’ll receive a validated attendance form good for one ag row, ag tree, ornamental and turf, or private applicator CEU.

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1. What is a major obstacle to producing plants for sale or for food?
A. Market conditions
B. Finding labor
C. Plant Disease
D. Weather

2. What is the definition of plant disease?

3. Abiotic plant problems are caused by nonliving stress factors and biotic plant problems are caused by things like fungi and bacteria.
A. True
B. False

4. What three things are needed for plant disease to occur?
A. Right environment for infection, fertilizer, and poor pruning
B. Plant pathogen, the right environment, and the host plant
C. Water, fertilizer, and the host plant
D. Plant pathogen, poor spray control, resistant host

5. Which organism causes the most disease?
A. Viruses
B. Bacteria
C. Fungi
D. Aphids

6. Which plant disease organism can directly infect the plant by penetrating the plant tissue or entering through wounds?
A. Bacteria
B. Virus
C. Phytoplasma
D. Fungi

7. Which plant disease organism can only live in the host plant phloem or the insect host vector?
A. Bacteria
B. Fungi
C. Viroid
D. Phytoplasma

8. The objective of plant disease control is to prevent disease. Which of these is NOT a general method of disease control?
A. Destroying crop residue
B. Using resistant varieties of plants
C. Disinfecting pruning clippers
D. Using high rates of fertilizer

9. For which organism is there no chemical control?
A. Fungi
B. Bacteria
C. Viroid

10. Which of the following practices should be followed for successful chemical control of disease?
A. Read and follow the pesticide label
B. Correctly identify the pest first
C. Obtain good spray coverage
D. All of the above

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