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CA Walnut Conference Replay Day 2 Test

CA Walnut Conference Replay Day 2 Test

Thank you for watching Day 2 of the California Walnut Conference! Below is the quiz for day 2. You must pass with a 70% or higher to get credit.

If you do not pass the first time you will be allowed to retake it until you pass.

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Question 1 of 18

1. Question

New disease resistant walnut rootstock genotypes are considered genetically engineered plants?

True
Correct Incorrect Correct answer

False
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Correct

Incorrect
Question 2 of 18

2. Question

These new genotypes completely eliminate the target disease, e.g. crown gall, phytophthora or lesion nematode?

True
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False
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Correct

Incorrect
Question 3 of 18

3. Question

New rootstock genotypes will eliminate replant disorders?

True
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False
Correct Incorrect Correct answer

Unknown
Correct Incorrect Correct answer

Correct

Incorrect
Question 4 of 18

4. Question

What is the feeding lifestyle of root lesion nematode, Pratylenchus vulnus?

Sedentary endoparasitic
Correct Incorrect Correct answer

Migratory endoparasitic
Correct Incorrect Correct answer

Migratory ectoparasitic
Correct Incorrect Correct answer

Correct

Incorrect
Question 5 of 18

5. Question

When soil sampling an existing orchard, plant parasitic nematodes can be detected by collecting composite samples near active roots, edge of the tree canopy, in the wetting zone of drip emitters/microsprinklers.

True
Correct Incorrect Correct answer

False
Correct Incorrect Correct answer

Correct

Incorrect
Question 6 of 18

6. Question

Fumigated orchard soil provides growers….

Earlier and larger yields
Correct Incorrect Correct answer

Increase early growth
Correct Incorrect Correct answer

Shorter orchard longevity
Correct Incorrect Correct answer

a and b
Correct Incorrect Correct answer

Correct

Incorrect
Question 7 of 18

7. Question

Crown and root rots of walnut can be caused by:

Phytophthora species
Correct Incorrect Correct answer

Armillaria
Correct Incorrect Correct answer

Prolonged soil anoxia due to waterlogging
Correct Incorrect Correct answer

All of the above
Correct Incorrect Correct answer

Correct

Incorrect
Question 8 of 18

8. Question

Phytophthora crown and root rots are caused by species of:

Virus
Correct Incorrect Correct answer

Fungi
Correct Incorrect Correct answer

Bacteria
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Oomycetes (commonly known as water molds)
Correct Incorrect Correct answer

Correct

Incorrect
Question 9 of 18

9. Question

Choose the least reliable long-term control strategy for integrated management of Phytophthora:

Preplant soil fumigation
Correct Incorrect Correct answer

Use of a rootstock with high resistance to Phytophthora
Correct Incorrect Correct answer

Careful soil water management
Correct Incorrect Correct answer

Schedule irrigations according to soil moisture conditions, evapotranspiration, and pressure bomb monitoring
Correct Incorrect Correct answer

Correct

Incorrect
Question 10 of 18

10. Question

Of currently available rootstocks, which one exhibits the greatest resistance to Phytophthora cinnamomi:

VX211
Correct Incorrect Correct answer

Vlach
Correct Incorrect Correct answer

RX1
Correct Incorrect Correct answer

Seedling Paradox
Correct Incorrect Correct answer

Correct

Incorrect
Question 11 of 18

11. Question

Why can codling moths more easily access developing walnuts?

Codling moth can bore through the walnut husk, but navel orangeworm can not
Correct Incorrect Correct answer

Codling moth are stronger fliers
Correct Incorrect Correct answer

Codling moth have a stronger preference for walnuts
Correct Incorrect Correct answer

Correct

Incorrect
Question 12 of 18

12. Question

How does codling moth infestation facilitate navel orangeworm infestation?

Navel orangeworm are attracted to codling moth
Correct Incorrect Correct answer

Damage to the hull from codling moth facilitates navel orangeworm access to developing walnuts
Correct Incorrect Correct answer

Codling moth distract parasitoids that usually attack navel orangeworm
Correct Incorrect Correct answer

Correct

Incorrect
Question 13 of 18

13. Question

Which of these practices are critical to navel orangeworm management in walnuts?

Winter sanitation
Correct Incorrect Correct answer

Mating disruption
Correct Incorrect Correct answer

Monitoring and well-timed sprays
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All of the above
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Correct

Incorrect
Question 14 of 18

14. Question

The key plant parasitic nematode in tree nuts is:

Lesion Nematode
Correct Incorrect Correct answer

Rootknot nematode
Correct Incorrect Correct answer

Ring nematode
Correct Incorrect Correct answer

All of the above
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Correct

Incorrect
Question 15 of 18

15. Question

The best way to determine if nematodes are a problem in your soils is:

Past experience
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Soil Sampling
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Foliar Symptom ID
Correct Incorrect Correct answer

Correct

Incorrect
Question 16 of 18

16. Question

The following root symptom is an indication of nematode damage?

Galls/swelling of knots
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Discolored lesions
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Increased lateral roots
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Reduction of root mass
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All of the above
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Correct

Incorrect
Question 17 of 18

17. Question

Which of the following field preparations is key for success in fumigating for nematodes?

Get soil moisture to below 12 percent
Correct Incorrect Correct answer

Adding compost
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Deep ripping
Correct Incorrect Correct answer

Both a and c
Correct Incorrect Correct answer

Correct

Incorrect
Question 18 of 18

18. Question

Which of the following insecticides has proven effective for nematodes?

Telone
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Imidacloprid
Correct Incorrect Correct answer

Roundup
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DDT
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Correct

Incorrect

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