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CA Walnut Conference 2021 Day 1 – Test

CA Walnut Conference 2021 Day 1 – Test

Thank you for watching Day 1 of the California Walnut Conference! Below is the quiz for day 1. 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 19

1. Question

Walnut husk flies attack on:

Tree branches
Correct Incorrect Correct answer

Leaves
Correct Incorrect Correct answer

Fruits/nuts
Correct Incorrect Correct answer

Correct

Incorrect
Question 2 of 19

2. Question

In general, walnut husk fly infestation in the orchard tend to be:

Throughout the orchard evenly
Correct Incorrect Correct answer

Patchy distribution in certain areas within the orchard
Correct Incorrect Correct answer

In the soil
Correct Incorrect Correct answer

Correct

Incorrect
Question 3 of 19

3. Question

Are there commercial traps/lures available for walnut husk fly monitoring?

Yes
Correct Incorrect Correct answer

No
Correct Incorrect Correct answer

Correct

Incorrect
Question 4 of 19

4. Question

Current insecticide control is effective at what stage of the husk fly?

Larvae
Correct Incorrect Correct answer

Pupae
Correct Incorrect Correct answer

Adult flies
Correct Incorrect Correct answer

Correct

Incorrect
Question 5 of 19

5. Question

Which of these herbicide active ingredients is primarily used as a preemergence material?

Carfentrazone (Shark)
Correct Incorrect Correct answer

Saflufenacil (Treevix)
Correct Incorrect Correct answer

Indaziflam (Alion)
Correct Incorrect Correct answer

Paraquat (Gramoxone)
Correct Incorrect Correct answer

Correct

Incorrect
Question 6 of 19

6. Question

When aggregated by site-of-action, the ACCase inhibiting grass herbicides are the most widely used group in walnut.

True
Correct Incorrect Correct answer

False
Correct Incorrect Correct answer

Correct

Incorrect
Question 7 of 19

7. Question

Multiple resistance in weeds is usually due to more than one mechanism of resistance rather than one mechanism conferring resistance to two chemistries.

True
Correct Incorrect Correct answer

False
Correct Incorrect Correct answer

Correct

Incorrect
Question 8 of 19

8. Question

Experimental evidence suggests that more than two applications of glyphosate in an orchard crop is likely to lead to micronutrient deficiencies.

True
Correct Incorrect Correct answer

False
Correct Incorrect Correct answer

Correct

Incorrect
Question 9 of 19

9. Question

What are the most common fungi causing walnut mold?

Alternaria, Fusarium, and Aspergillus niger
Correct Incorrect Correct answer

Botryosphaeria?
Correct Incorrect Correct answer

Phomopsis?
Correct Incorrect Correct answer

Bread mold?
Correct Incorrect Correct answer

Correct

Incorrect
Question 10 of 19

10. Question

Which type of walnut fruit will have high mold?

The ones that are harvested late.
Correct Incorrect Correct answer

The ones that drop (windfalls).
Correct Incorrect Correct answer

Insect infested nuts.
Correct Incorrect Correct answer

All of the above.
Correct Incorrect Correct answer

Correct

Incorrect
Question 11 of 19

11. Question

Sprays with fungicides in early hull split are effective in reducing mold.

True
Correct Incorrect Correct answer

False
Correct Incorrect Correct answer

Correct

Incorrect
Question 12 of 19

12. Question

What diseases do sprays with fungicides in mid-May, mid-June, and mid-July reduce?

Botryosphaeria/Phomopsis canker?
Correct Incorrect Correct answer

Alternaria mold?
Correct Incorrect Correct answer

Fusarium mold?
Correct Incorrect Correct answer

Aspergillus mold?
Correct Incorrect Correct answer

Correct

Incorrect
Question 13 of 19

13. Question

What nematode species is currently considered the most damaging parasite on walnut?

Ring nematode
Correct Incorrect Correct answer

Root-knot nematode
Correct Incorrect Correct answer

Root lesion nematode
Correct Incorrect Correct answer

None of the nematodes above cause any damage to walnut
Correct Incorrect Correct answer

Correct

Incorrect
Question 14 of 19

14. Question

All nematodes are bad soil organisms that cause losses to agricultural production. Is this statement true?

True
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False
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Correct

Incorrect
Question 15 of 19

15. Question

What should be considered when choosing a rootstock?

Field history
Correct Incorrect Correct answer

Soil Type
Correct Incorrect Correct answer

Prior records of soil-borne problems
Correct Incorrect Correct answer

all of the above.
Correct Incorrect Correct answer

Correct

Incorrect
Question 16 of 19

16. Question

Why is it important to take a soil sample for nematode detection and ID before starting future orchard ground preparation?

Because nematodes will occur whenever walnut is grown.
Correct Incorrect Correct answer

Because this can help decide whether to fumigate and what rootstock to choose.
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Because preplant soil fumigation is always beneficial
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Soil sampling and nematode evaluations are unnecessary and expensive procedures that never pay for themselves
Correct Incorrect Correct answer

Correct

Incorrect
Question 17 of 19

17. Question

The greatest spore release of Diaporthaceae and Botryosphaeriaceae spp. occurr:

During and following rain events.
Correct Incorrect Correct answer

Following shredding/grinding infected branches between tree rows
Correct Incorrect Correct answer

All the above
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Correct

Incorrect
Question 18 of 19

18. Question

Walnut pruning wounds are susceptible to Bot/Phomopsis infection for about:

Four weeks
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Four months
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Not susceptible
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Correct

Incorrect
Question 19 of 19

19. Question

Which of the following are contributing factors to the Bot/Phomopsis disease:

Pruning wounds
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Sunburn
Correct Incorrect Correct answer

Frost damage
Correct Incorrect Correct answer

All the above
Correct Incorrect Correct answer

Correct

Incorrect

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