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2025 California Walnut Conference Final Quiz-old

2025 California Walnut Conference Final Quiz-old

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Question 1 of 10

1. Question

What is the sterile insect technique (SIT) for navel orangeworm (NOW) management?

Spraying insecticides that sterilize adult moths
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Releasing sterilized male moths to reduce reproduction rates
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Applying hormones to prevent egg development
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Using heat treatments to reduce populations
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Question 2 of 10

2. Question

How does areawide management contribute to controlling NOW populations?

It delays bloom timing to reduce pest overlap
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It coordinates pest suppression efforts across orchards to reduce overall pressure
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It focuses only on chemical use in large orchards
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It uses drones to spray insecticides
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Question 3 of 10

3. Question

What is the primary causal agent of walnut blight?

Phytophthora cinnamomi
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Xanthomonas arboricola pv. juglandis
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Fusarium oxysporum
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Botryosphaeria dothidea
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Question 4 of 10

4. Question

What has been a key traditional treatment for walnut blight?

Sulfur-based sprays
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Neem oil
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Copper-based bactericides
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Synthetic fungicides for powdery mildew
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Question 5 of 10

5. Question

Why is walnut blight management becoming more difficult?

The pathogen is developing resistance to all treatments
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Regulatory restrictions are reducing product availability
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Growers are planting fewer walnut trees
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The disease is only affecting older orchards
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Question 6 of 10

6. Question

What is one goal of California’s Sustainable Pest Management (SPM) Roadmap?

Increase usage of conventional pesticides
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Transition toward safer, longer-term pest solutions
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Replace pesticides with fertilizers
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Eliminate pest scouting
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Question 7 of 10

7. Question

What does Jhalendra Rijal recommend for managing new and emerging walnut pests?

Focus only on reactive sprays
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Apply insecticides every 7 days regardless of pressure
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Use integrated pest management (IPM) with monitoring and thresholds
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Delay control until post-harvest
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Question 8 of 10

8. Question

What is one challenge related to MRLs (maximum residue limits) in walnut export markets?

U.S. MRLs are stricter than export markets
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MRLs are being removed entirely
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Some countries have lower MRL thresholds, limiting product choices
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MRLs don’t apply to tree nuts
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Question 9 of 10

9. Question

How does the EPA’s Endangered Species Act (ESA) affect pesticide use?

It provides more funding for synthetic pesticide development
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It requires additional review to ensure products don’t harm protected species
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It allows fast-track approval for restricted-use pesticides
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It only applies to urban pest control
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Question 10 of 10

10. Question

What is a current concern for walnut growers regarding product availability?

Too many new options with unclear efficacy
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Overabundance of organic-only solutions
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Fewer active ingredients being registered and increasing regulatory delays
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All products now require drone application
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Any courses taken after December 31, 2025 will not receive CE credit. Stay tuned for updated courses for 2026!

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