Part 1 Quiz
This quiz will test your knowledge of disease diagnosis in the field and in the lab.
Oomycete Disease Diagnosis in the Field and Lab Quiz
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This quiz will test your knowledge of the causes of disease diagnosis in the field and in the lab.
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Question 1 of 15
1. Question
A farmer notices a problem in this part of their field that they believe is a seed or seedling disease problem. Which choice best describes the situation.
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Hint
Look at the emergence pattern in this part of the field.
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Question 2 of 15
2. Question
There are four rows of soybean pictured above.. row 1 is in the lower left, row 4 in the upper right. Predict where the standing water / saturated soil line was a week earlier in this field.
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Hint
Look for between row variation
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Question 3 of 15
3. Question
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Hint
These plants are in row 4 from the previous question.
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Question 4 of 15
4. Question
Which part of this soybean seedling is showing damage that could have been from infection by Pythium because of direct contact with soil while the germinating seedling was still in the ground.
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Hint
Where is the most damaged part of this seedling?
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Question 5 of 15
5. Question
What observation is the agronomist making in the image above that is consistent with pythium disease?
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Hint
The knife assists this diagnosis.
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Question 6 of 15
6. Question
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Hint
The Plant disease clinician is not likely to go into the field in order to diagnose a problem and must make conclusions based on plants in the sample.
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Question 7 of 15
7. Question
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Hint
Think about what will happen to this sample once it gets to the lab of the plant disease clinician.
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Question 8 of 15
8. Question
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Hint
It is difficult for the clinicians to work with samples that are confusing or poorly handled by the field biologist.
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Question 9 of 15
9. Question
What is the disease diagnosis clinician doing with the plant root tissue as a first step after examining the entire plant?
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Hint
Many kinds of microorgansisms live with plant roots.
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Question 10 of 15
10. Question
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Hint
This is a petri dish with Agar
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Question 11 of 15
11. Question
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Hint
The key to diagnosis is to promote the growth of the causal organism.
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Question 12 of 15
12. Question
What will the diagnostician do next if they use this kind of growth media to grow microbes from their samples.
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Hint
Oomycetes living in water agar cannot grow for very long.
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Question 13 of 15
13. Question
The clinician is examining microbes associated with disease tissue that were placed on water agar. What are they focusing their microscope examination upon?
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Hint
Techniques need to be used that induce microbes to grow structures that are visibly unique between species.
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Question 14 of 15
14. Question
Why will the clinician work so hard to determine if the unhealthy plants have a disease and the disease is caused by a specific microbe?
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Hint
Farmers must consider all the possible problems their plants encounter and be prepared to plan ahead to the next growing season based on what happens in the current growing season.
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Question 15 of 15
15. Question
Which media provides the best information for the clinician who is trying to identify the microbe causing a disease on a plant sample?
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Hint
One microbe could be causing disease while other microbes normally grow with the healthy plant or take advantage of the dying plant.