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Ohio Pesticide Applicator Certification: Category 6a –
Ornamental Weed Control Exam Questions and Correct
Answers with EXPLANATIONS LATEST THIS YEAR
Ohio Pesticide Applicator Certification: Category 6a – Ornamental Weed Control Exam
Exam Coverage Summary
The Ohio Category 6a – Ornamental Weed Control certification is a commercial pesticide applicator
category that specifically regulates weed management in ornamental plantings, landscaped areas, and
around ornamental shrubs and trees . This category does NOT cover agronomic row crops, turf-only
applications, or aquatic environments .
Key topics include: weed identification (annuals, biennials, perennials; grass vs. broadleaf vs.
sedge), herbicide classification (selective vs. nonselective; preemergence vs. postemergence; systemic
vs. contact), herbicide mode of action and resistance management, application methods and
calibration, label comprehension and legal requirements, personal protective equipment (PPE) and
safety practices, drift prevention and environmental protection, recordkeeping, and Ohio pesticide
laws and regulations (Ohio Revised Code Chapter 921) .
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Question 1
What is the primary focus of Category 6a in Ohio pesticide certification?
A) Weed control in agronomic row crops
B) Weed control in turfgrass only
C) Weed control in ornamental plantings and landscaped areas
D) Aquatic weed control
Correct Answer: C
*Summary Rationale: Category 6a specifically regulates weed management in ornamental plantings,
landscaped beds, and around ornamental shrubs and trees, NOT row crops, turf-only, or aquatic
systems .*
Question 2
Which type of weed completes its life cycle in a single growing season?
A) Biennial
B) Perennial
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C) Annual
D) Woody
Correct Answer: C
Summary Rationale: Annual weeds germinate, grow, flower, produce seed, and die within a single
growing season, making timing of control especially important .
Question 3
A weed that lives for two years and typically flowers in the second year is classified as:
A) Annual
B) Biennial
C) Perennial
D) Rhizomatous
Correct Answer: B
Summary Rationale: Biennial weeds usually form a rosette the first year and flower and set seed during
the second year .
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Question 4
Which structure allows some perennial weeds to spread underground?
A) Stolons
B) Rhizomes
C) Tubers
D) All of the above
Correct Answer: D
Summary Rationale: Perennial weeds can spread via underground rhizomes, stolons, tubers, or
rootstocks, allowing them to survive adverse conditions and regrow .
Question 5
Which of the following is a common perennial broadleaf weed in ornamental beds?
A) Crabgrass
B) Dandelion
Ohio Pesticide Applicator Certification: Category 6a –
Ornamental Weed Control Exam Questions and Correct
Answers with EXPLANATIONS LATEST THIS YEAR
Ohio Pesticide Applicator Certification: Category 6a – Ornamental Weed Control Exam
Exam Coverage Summary
The Ohio Category 6a – Ornamental Weed Control certification is a commercial pesticide applicator
category that specifically regulates weed management in ornamental plantings, landscaped areas, and
around ornamental shrubs and trees . This category does NOT cover agronomic row crops, turf-only
applications, or aquatic environments .
Key topics include: weed identification (annuals, biennials, perennials; grass vs. broadleaf vs.
sedge), herbicide classification (selective vs. nonselective; preemergence vs. postemergence; systemic
vs. contact), herbicide mode of action and resistance management, application methods and
calibration, label comprehension and legal requirements, personal protective equipment (PPE) and
safety practices, drift prevention and environmental protection, recordkeeping, and Ohio pesticide
laws and regulations (Ohio Revised Code Chapter 921) .
, Page 2 of 129
Question 1
What is the primary focus of Category 6a in Ohio pesticide certification?
A) Weed control in agronomic row crops
B) Weed control in turfgrass only
C) Weed control in ornamental plantings and landscaped areas
D) Aquatic weed control
Correct Answer: C
*Summary Rationale: Category 6a specifically regulates weed management in ornamental plantings,
landscaped beds, and around ornamental shrubs and trees, NOT row crops, turf-only, or aquatic
systems .*
Question 2
Which type of weed completes its life cycle in a single growing season?
A) Biennial
B) Perennial
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C) Annual
D) Woody
Correct Answer: C
Summary Rationale: Annual weeds germinate, grow, flower, produce seed, and die within a single
growing season, making timing of control especially important .
Question 3
A weed that lives for two years and typically flowers in the second year is classified as:
A) Annual
B) Biennial
C) Perennial
D) Rhizomatous
Correct Answer: B
Summary Rationale: Biennial weeds usually form a rosette the first year and flower and set seed during
the second year .
, Page 4 of 129
Question 4
Which structure allows some perennial weeds to spread underground?
A) Stolons
B) Rhizomes
C) Tubers
D) All of the above
Correct Answer: D
Summary Rationale: Perennial weeds can spread via underground rhizomes, stolons, tubers, or
rootstocks, allowing them to survive adverse conditions and regrow .
Question 5
Which of the following is a common perennial broadleaf weed in ornamental beds?
A) Crabgrass
B) Dandelion
