Part 2 Quiz
This quiz will test your knowledge of the causes of disease in soybean fields.
Oomycete Cause of Seedling Disease Quiz
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This quiz will test your knowledge of the causes of seedling disease in soybean diversity, pathogenicity, and virulence.
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Question 1 of 15
1. Question
A seedling disease infects plants in one part of a soybean field. The organism responsible for this disease is…
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Hint
Hint: check out this reference
http://www.extension.umn.edu/agriculture/crop-diseases/soybean/soybeandisease.html -
Question 2 of 15
2. Question
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Hint
Hint: Seedlings with the same disease symptoms can be caused by different microorganisms
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Question 3 of 15
3. Question
Soybean plants showing seedling disease symptoms are sampled from locations shown above in 2011 and in 2012. Microorganisms are cultured from these samples with methods that promote Pyithium and Phytophthora growth. Hundreds of these cultures are analyzed by sequencing their DNA. How many different species will be cultured and identified?
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Hint
HINT: Oomycetes form a community in the soil ecosystems.
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Question 4 of 15
4. Question
The frequencies of the 30 most common oomycete species observed in the 2011 and 2012 growing seasons are shown in the figure above. Which statement below is NOT supported by this data?
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Hint
HINT: This figure provides information on both occurrence and abundence
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Question 5 of 15
5. Question
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Hint
HINT: Observe the range of seed health in these four germination plates
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Question 6 of 15
6. Question
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Hint
Hint: What is the difference between pathogenic and virulent?
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Question 7 of 15
7. Question
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Hint
Hint: Come up with a virulence scale based on visual comparisons.
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Question 8 of 15
8. Question
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Hint
Hint: Compare these choices with the visual data
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Question 9 of 15
9. Question
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Hint
Hint: Justify the correct choice based on the visual data
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Question 10 of 15
10. Question
Assume the assay shown above was repeated at a cooler temperature. Under those conditions, we would expect the seedlings living with Phytophthora sojae to look like…
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Hint
Hint: You need to know the results of the temperature impact experiment
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Question 11 of 15
11. Question
The table above shows the seed rot disease severity (Y axis) for many different species of oomycetes (X axis). The disease severity assay was conducted at cooler (blue) and warmer (red) conditions. Which conclusion is best supported by this data?
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Hint
Hint: Carefully compare and contrast the the temperature impact.
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Question 12 of 15
12. Question
Which is the best statement that compares the seed rot severity caused by the species designated with the red, green and blue arrows?
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Hint
Hint: Carefully compare and contrast the the temperature impact.
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Question 13 of 15
13. Question
Assume that a farmer has in their field, several of the Pythium species from the group in the blue box from the graph above. They also have Phytophthora (red arrow). What should they expect to observe when they grow soybeans?
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Hint
Hint: The species are arranged by disease severity
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Question 14 of 15
14. Question
A farmer has numerous oomycete species in this part of their field. They could have a stand count reduced as a result of…
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Hint
Hint: Use the data shared in this part of the lesson
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Question 15 of 15
15. Question
A reason why a farmer may benefit from knowing which oomycete species are living in their fields is….
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Hint
Hint: Consider management choices available and remember, they are not all effective across oomycete species.