Oregon Category D — Seed Treatment
Pest Control Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
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1. Which is the primary purpose of seed treatment with pesticides?
A. Increase seed size
B. Protect seeds and seedlings from insects, diseases, and pests
C. Improve soil fertility
D. Speed up harvesting
Seed treatments are applied to protect seeds and emerging seedlings
from early-season pest damage, improving stand establishment and
crop success.
2. Which type of pesticide is most commonly used in seed treatment?
A. Herbicides
B. Rodenticides
C. Fungicides and insecticides
, D. Avicides
Seed treatments most frequently involve fungicides to prevent seed
rot and insecticides to protect against soil and seed-feeding insects.
3. What is a major advantage of seed treatment over foliar application?
A. Higher application cost
B. Broader environmental contamination
C. Lower pesticide use per acre and targeted protection
D. Increased drift potential
Seed treatments use small amounts of pesticide directly on seeds,
reducing environmental exposure and targeting pests at
germination.
4. Which pest is commonly controlled by seed treatments?
A. Birds
B. Seedcorn maggot
C. Deer
D. Aphids only on leaves
Seedcorn maggot is a soil-dwelling insect that attacks seeds before
or during germination, making seed treatment effective.
5. What is the main risk of improper seed treatment application?
A. Improved yield
B. Reduced germination and phytotoxicity
C. Seed injury and poor plant establishment
D. Increased pollination
, Over-application or improper chemical use can damage seed viability
and reduce germination rates.
6. Which formulation is most common for seed treatment pesticides?
A. Dustable powders only
B. Liquid suspensions and flowable concentrates
C. Gaseous fumigants
D. Granules only
Liquid formulations adhere more uniformly to seed surfaces, ensuring
consistent protection.
7. What is phytotoxicity in seed treatment?
A. Pest resistance development
B. Chemical injury to seeds or seedlings
C. Soil enrichment
D. Increased germination rate
Phytotoxicity occurs when pesticide doses or formulations damage
plant tissue.
8. Why is calibration important in seed treatment equipment?
A. To increase pesticide volatility
B. To reduce seed size
C. To ensure correct pesticide dosage per seed unit
D. To change seed color
Proper calibration ensures the correct amount of pesticide is applied
uniformly to prevent under- or over-treatment.
Pest Control Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which is the primary purpose of seed treatment with pesticides?
A. Increase seed size
B. Protect seeds and seedlings from insects, diseases, and pests
C. Improve soil fertility
D. Speed up harvesting
Seed treatments are applied to protect seeds and emerging seedlings
from early-season pest damage, improving stand establishment and
crop success.
2. Which type of pesticide is most commonly used in seed treatment?
A. Herbicides
B. Rodenticides
C. Fungicides and insecticides
, D. Avicides
Seed treatments most frequently involve fungicides to prevent seed
rot and insecticides to protect against soil and seed-feeding insects.
3. What is a major advantage of seed treatment over foliar application?
A. Higher application cost
B. Broader environmental contamination
C. Lower pesticide use per acre and targeted protection
D. Increased drift potential
Seed treatments use small amounts of pesticide directly on seeds,
reducing environmental exposure and targeting pests at
germination.
4. Which pest is commonly controlled by seed treatments?
A. Birds
B. Seedcorn maggot
C. Deer
D. Aphids only on leaves
Seedcorn maggot is a soil-dwelling insect that attacks seeds before
or during germination, making seed treatment effective.
5. What is the main risk of improper seed treatment application?
A. Improved yield
B. Reduced germination and phytotoxicity
C. Seed injury and poor plant establishment
D. Increased pollination
, Over-application or improper chemical use can damage seed viability
and reduce germination rates.
6. Which formulation is most common for seed treatment pesticides?
A. Dustable powders only
B. Liquid suspensions and flowable concentrates
C. Gaseous fumigants
D. Granules only
Liquid formulations adhere more uniformly to seed surfaces, ensuring
consistent protection.
7. What is phytotoxicity in seed treatment?
A. Pest resistance development
B. Chemical injury to seeds or seedlings
C. Soil enrichment
D. Increased germination rate
Phytotoxicity occurs when pesticide doses or formulations damage
plant tissue.
8. Why is calibration important in seed treatment equipment?
A. To increase pesticide volatility
B. To reduce seed size
C. To ensure correct pesticide dosage per seed unit
D. To change seed color
Proper calibration ensures the correct amount of pesticide is applied
uniformly to prevent under- or over-treatment.
