OHIO PESTICIDE APPLICATOR CERTIFICATION CATEGORY 6A
ORNAMENTAL WEED CONTROL ACTUAL TEST EXAM 2026/2027
COMPLETE ACCURATE EXAM REAL QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED SOLUTIONS)
LATEST UPDATED VERSION 2026 |ALREADY GRADED A+ (BRAND
NEW) APPROVED EXAM
The primary goal of ornamental weed control is to:
A. eliminate all vegetation
B. reduce weed competition without harming ornamentals
C. sterilize the soil
D. prevent insect infestations
correct answer b
Rationale: Weed control in ornamentals focuses on reducing competition while
preserving desirable plants.
Which weed life cycle completes in one growing season?
A. perennial
B. biennial
C. annual
D. rhizomatous
correct answer c
Rationale: Annual weeds germinate, grow, produce seed, and die within one
season.
Crabgrass is classified as a:
,A. broadleaf perennial
B. grassy annual
C. woody biennial
D. sedge
correct answer b
Rationale: Crabgrass is a grassy annual weed common in ornamental landscapes.
Reemergence herbicides control weeds by:
A. killing mature plants
B. preventing seed germination
C. burning foliage
D. killing roots of established weeds
correct answer b
Rationale: Reemergence herbicides prevent weed seeds from germinating.
When should reemergence herbicides be applied for summer annual weeds?
A. after weeds emerge
B. during peak summer heat
C. before weed seeds germinate
D. after flowering
correct answer c
Rationale: Reemergence products must be applied before germination occurs.
,Post emergence herbicides are most effective when weeds are:
A. drought stressed
B. flowering
C. young and actively growing
D. dormant
correct answer c
Rationale: Young, actively growing weeds absorb herbicides more effectively.
Which weed reproduces primarily by rhizomes?
A. dandelion
B. quack grass
C. lamb’s quarters
D. purslane
correct answer b
Rationale: Quack grass spreads aggressively through underground rhizomes.
A selective herbicide:
A. kills all plants
B. kills only weeds
C. kills specific plant types
D. sterilizes soil
, correct answer c
Rationale: Selective herbicides target certain plant groups while sparing others.
A nonselective herbicide will:
A. kill only broadleaf weeds
B. kill only grasses
C. kill most green plants
D. prevent seed germination only
correct answer c
Rationale: Nonselective herbicides affect most vegetation they contact.
Glyphosate is an example of a:
A. selective reemergence herbicide
B. nonselective post emergence herbicide
C. contact herbicide
D. soil fumigant
correct answer b
Rationale: Glyphosate is a systemic, nonselective post emergence herbicide.
Contact herbicides kill plants by:
A. moving through the vascular system
B. destroying root systems
C. damaging only contacted tissue
ORNAMENTAL WEED CONTROL ACTUAL TEST EXAM 2026/2027
COMPLETE ACCURATE EXAM REAL QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED SOLUTIONS)
LATEST UPDATED VERSION 2026 |ALREADY GRADED A+ (BRAND
NEW) APPROVED EXAM
The primary goal of ornamental weed control is to:
A. eliminate all vegetation
B. reduce weed competition without harming ornamentals
C. sterilize the soil
D. prevent insect infestations
correct answer b
Rationale: Weed control in ornamentals focuses on reducing competition while
preserving desirable plants.
Which weed life cycle completes in one growing season?
A. perennial
B. biennial
C. annual
D. rhizomatous
correct answer c
Rationale: Annual weeds germinate, grow, produce seed, and die within one
season.
Crabgrass is classified as a:
,A. broadleaf perennial
B. grassy annual
C. woody biennial
D. sedge
correct answer b
Rationale: Crabgrass is a grassy annual weed common in ornamental landscapes.
Reemergence herbicides control weeds by:
A. killing mature plants
B. preventing seed germination
C. burning foliage
D. killing roots of established weeds
correct answer b
Rationale: Reemergence herbicides prevent weed seeds from germinating.
When should reemergence herbicides be applied for summer annual weeds?
A. after weeds emerge
B. during peak summer heat
C. before weed seeds germinate
D. after flowering
correct answer c
Rationale: Reemergence products must be applied before germination occurs.
,Post emergence herbicides are most effective when weeds are:
A. drought stressed
B. flowering
C. young and actively growing
D. dormant
correct answer c
Rationale: Young, actively growing weeds absorb herbicides more effectively.
Which weed reproduces primarily by rhizomes?
A. dandelion
B. quack grass
C. lamb’s quarters
D. purslane
correct answer b
Rationale: Quack grass spreads aggressively through underground rhizomes.
A selective herbicide:
A. kills all plants
B. kills only weeds
C. kills specific plant types
D. sterilizes soil
, correct answer c
Rationale: Selective herbicides target certain plant groups while sparing others.
A nonselective herbicide will:
A. kill only broadleaf weeds
B. kill only grasses
C. kill most green plants
D. prevent seed germination only
correct answer c
Rationale: Nonselective herbicides affect most vegetation they contact.
Glyphosate is an example of a:
A. selective reemergence herbicide
B. nonselective post emergence herbicide
C. contact herbicide
D. soil fumigant
correct answer b
Rationale: Glyphosate is a systemic, nonselective post emergence herbicide.
Contact herbicides kill plants by:
A. moving through the vascular system
B. destroying root systems
C. damaging only contacted tissue
