Oklahoma Commercial Pesticide
Applicator Certification Exam Category
1c: Seed Treatment Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1.
Which is the primary purpose of seed treatment pesticides in agricultural
production?
A. Increase soil fertility
B. Protect seeds and seedlings from insects, fungi, and pathogens
C. Accelerate plant genetic modification
D. Eliminate the need for irrigation
Rationale: Seed treatment pesticides are specifically designed to protect seeds
and emerging seedlings from early-season pests such as fungi, insects, and soil-
borne pathogens. This protection ensures better germination rates, uniform crop
emergence, and reduced early plant loss. They do not replace fertility
management, irrigation, or genetic processes.
2.
Which factor most influences the effectiveness of a seed treatment application?
,A. Soil color
B. Uniform coating of seed with active ingredient
C. Field elevation
D. Wind speed during planting
Rationale: Proper and uniform coverage ensures that each seed receives an
adequate and consistent dose of the pesticide. Uneven coating can lead to poor
protection, phytotoxicity, or treatment failure. Environmental factors like wind
or soil color do not directly determine treatment effectiveness.
3.
Which class of pesticides is most commonly used for fungal seed protection?
A. Herbicides
B. Rodenticides
C. Insect growth regulators
D. Fungicides
Rationale: Fungicides are the primary chemical class used in seed treatments to
control seed-borne and soil-borne fungal diseases such as Pythium, Fusarium,
and Rhizoctonia. Herbicides control weeds, rodenticides control rodents, and
insect growth regulators target insect development.
4.
Over-application of seed treatment pesticides may result in:
A. Increased nitrogen fixation
B. Improved germination speed
C. Phytotoxicity and reduced seed viability
D. Reduced seed density requirements
,Rationale: Excessive pesticide loading can damage seed embryos, reduce
germination rates, and lead to phytotoxic effects that inhibit early plant growth.
Seed treatments must be applied at precise labeled rates to avoid damage.
5.
Which personal protective equipment (PPE) is most critical during seed treatment
handling?
A. Steel-toe boots only
B. Hearing protection
C. Sun hat
D. Chemical-resistant gloves and eye protection
Rationale: Seed treatment chemicals can be toxic or irritating upon skin and eye
contact. Gloves and eye protection reduce exposure risk during mixing, loading,
and handling treated seed. Other PPE may be useful but are not primary
requirements for chemical exposure prevention.
6.
Which environmental concern is most associated with improper handling of
treated seed dust?
A. Soil compaction
B. Increased rainfall
C. Harm to pollinators such as bees
D. Reduced sunlight penetration
Rationale: Dust generated from treated seed can contain active pesticide
ingredients that are toxic to pollinators. If released during planting, it can drift
and contaminate flowering plants visited by bees.
7.
, What is the function of a seed coating polymer in pesticide applications?
A. Acts as fertilizer
B. Binds pesticide to seed and improves adhesion
C. Increases seed size for mechanical planting
D. Neutralizes pesticide toxicity completely
Rationale: Polymers are used to bind pesticide active ingredients to the seed
surface, ensuring better adhesion, reduced dust-off, and improved uniformity of
application. They do not neutralize toxicity or act as fertilizers.
8.
Which condition can reduce seed treatment performance during storage?
A. Low humidity
B. Proper ventilation
C. Excessive moisture leading to seed deterioration
D. Cool temperatures below freezing
Rationale: High moisture levels can promote microbial growth and degradation
of both seed and pesticide coatings, reducing effectiveness and seed viability.
Proper dry storage conditions are essential.
9.
Which is a key advantage of seed treatments over foliar pesticide applications?
A. They eliminate need for crop rotation
B. They increase pesticide volatility
C. They require more water usage
D. They provide early-stage pest protection with lower total pesticide use
Rationale: Seed treatments deliver targeted protection at the earliest growth
stage using significantly lower amounts of active ingredient compared to foliar
sprays, improving efficiency and environmental safety.
Applicator Certification Exam Category
1c: Seed Treatment Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1.
Which is the primary purpose of seed treatment pesticides in agricultural
production?
A. Increase soil fertility
B. Protect seeds and seedlings from insects, fungi, and pathogens
C. Accelerate plant genetic modification
D. Eliminate the need for irrigation
Rationale: Seed treatment pesticides are specifically designed to protect seeds
and emerging seedlings from early-season pests such as fungi, insects, and soil-
borne pathogens. This protection ensures better germination rates, uniform crop
emergence, and reduced early plant loss. They do not replace fertility
management, irrigation, or genetic processes.
2.
Which factor most influences the effectiveness of a seed treatment application?
,A. Soil color
B. Uniform coating of seed with active ingredient
C. Field elevation
D. Wind speed during planting
Rationale: Proper and uniform coverage ensures that each seed receives an
adequate and consistent dose of the pesticide. Uneven coating can lead to poor
protection, phytotoxicity, or treatment failure. Environmental factors like wind
or soil color do not directly determine treatment effectiveness.
3.
Which class of pesticides is most commonly used for fungal seed protection?
A. Herbicides
B. Rodenticides
C. Insect growth regulators
D. Fungicides
Rationale: Fungicides are the primary chemical class used in seed treatments to
control seed-borne and soil-borne fungal diseases such as Pythium, Fusarium,
and Rhizoctonia. Herbicides control weeds, rodenticides control rodents, and
insect growth regulators target insect development.
4.
Over-application of seed treatment pesticides may result in:
A. Increased nitrogen fixation
B. Improved germination speed
C. Phytotoxicity and reduced seed viability
D. Reduced seed density requirements
,Rationale: Excessive pesticide loading can damage seed embryos, reduce
germination rates, and lead to phytotoxic effects that inhibit early plant growth.
Seed treatments must be applied at precise labeled rates to avoid damage.
5.
Which personal protective equipment (PPE) is most critical during seed treatment
handling?
A. Steel-toe boots only
B. Hearing protection
C. Sun hat
D. Chemical-resistant gloves and eye protection
Rationale: Seed treatment chemicals can be toxic or irritating upon skin and eye
contact. Gloves and eye protection reduce exposure risk during mixing, loading,
and handling treated seed. Other PPE may be useful but are not primary
requirements for chemical exposure prevention.
6.
Which environmental concern is most associated with improper handling of
treated seed dust?
A. Soil compaction
B. Increased rainfall
C. Harm to pollinators such as bees
D. Reduced sunlight penetration
Rationale: Dust generated from treated seed can contain active pesticide
ingredients that are toxic to pollinators. If released during planting, it can drift
and contaminate flowering plants visited by bees.
7.
, What is the function of a seed coating polymer in pesticide applications?
A. Acts as fertilizer
B. Binds pesticide to seed and improves adhesion
C. Increases seed size for mechanical planting
D. Neutralizes pesticide toxicity completely
Rationale: Polymers are used to bind pesticide active ingredients to the seed
surface, ensuring better adhesion, reduced dust-off, and improved uniformity of
application. They do not neutralize toxicity or act as fertilizers.
8.
Which condition can reduce seed treatment performance during storage?
A. Low humidity
B. Proper ventilation
C. Excessive moisture leading to seed deterioration
D. Cool temperatures below freezing
Rationale: High moisture levels can promote microbial growth and degradation
of both seed and pesticide coatings, reducing effectiveness and seed viability.
Proper dry storage conditions are essential.
9.
Which is a key advantage of seed treatments over foliar pesticide applications?
A. They eliminate need for crop rotation
B. They increase pesticide volatility
C. They require more water usage
D. They provide early-stage pest protection with lower total pesticide use
Rationale: Seed treatments deliver targeted protection at the earliest growth
stage using significantly lower amounts of active ingredient compared to foliar
sprays, improving efficiency and environmental safety.
