Kentucky Category 3 Ornamental & Turf Pest Control Exam
- 2026/2027 Edition | 100 Verified Questions
Kentucky Category 3 Ornamental & Turf Pest Control Exam 2026-2027 QUESTIONS AND ANSWERS ALREADY
GRADED A+. 100% Verified Solutions | Updated Per Latest Guidelines | Graded A+
This comprehensive exam prep document covers all essential topics for the Kentucky Category 3
Ornamental & Turf Pest Control certification. It includes 100 verified questions with detailed
rationales, reflecting the latest 2026/2027 guidelines. Designed for professionals seeking licensure, this
resource ensures mastery of pest identification, pesticide application, and regulatory compliance.
Abstract:
This document provides a rigorous preparation tool for the Kentucky Category 3 Ornamental & Turf Pest Control
Exam, featuring 100 questions with verified answers and comprehensive rationales. Each question is designed to
test knowledge of pest biology, pesticide chemistry, application techniques, and regulatory compliance specific to
Kentucky. The rationales explain not only the correct answer but also why distractors are incorrect, reinforcing
deeper understanding. Content aligns with the latest 2026/2027 guidelines from the Kentucky Department of
Agriculture and EPA. Topics include turfgrass and ornamental plant pests, pesticide safety, IPM, and
environmental stewardship. This resource is ideal for candidates aiming for a high pass rate and professional
competence in pest control operations.
Content Area Overview:
Content Area Questions Key Topics Weight
Pest Identification and Biology 1-25 Turfgrass insects, ornamental pests, disease 25%
identification, weed species
Pesticide Chemistry and 26-45 Active ingredients, formulations, adjuvants, 20%
Formulations pesticide resistance
Application Equipment and 46-60 Sprayer types, nozzle selection, calibration 15%
Calibration math, droplet size
Integrated Pest Management 61-75 Monitoring, thresholds, cultural controls, 15%
(IPM) biological controls
Safety and Personal Protective 76-85 PPE selection, handling spills, first aid, 10%
Equipment pesticide storage
Regulations and Environmental 86-100 Kentucky pesticide laws, recordkeeping, 15%
Protection endangered species, water quality
Page 1
,Q1. A turf manager observes necrotic rings in a creeping bentgrass putting green during summer
stress. Microscopic examination reveals coenocytic hyphae and sporangia. Which fungicide mode of
action is most appropriate, and what application strategy minimizes resistance risk?
A. Apply a QoI fungicide (FRAC 11) as a solo product preventively every 14 days.
B. Apply a DMI fungicide (FRAC 3) curatively at the first sign of symptoms.
C. Apply a phosphonate fungicide (FRAC 33) in combination with a contact fungicide, alternating
with a different mode of action.
D. Apply a dicarboximide fungicide (FRAC 2) on a 7-day schedule during cool, wet weather.
Correct Answer: C. Apply a phosphonate fungicide (FRAC 33) in combination with a contact
fungicide, alternating with a different mode of action.
Rationale: The symptoms and microscopy suggest a Pythium blight (Oomycete) infection. Phosphonates
are effective against Oomycetes and are best used in combination with a contact fungicide to reduce
resistance risk. Alternating modes of action further delays resistance. QoI fungicides have high resistance
risk in Pythium and should not be used solo. DMI fungicides are ineffective against Oomycetes.
Dicarboximides are for other pathogens and ineffective against Pythium.
Why Wrong:
A - QoI fungicides have a high resistance risk in Pythium and should not be used as solo products
for curative control.
B - DMI fungicides target sterol biosynthesis and are ineffective against Oomycetes like Pythium.
D - Dicarboximides are used against Rhizoctonia and Sclerotinia, not Oomycetes, and resistance
management is poor with frequent applications.
Reference: Kentucky Pest Management Guide for Turfgrass (2024), Section on Pythium Blight; FRAC
Code List 2024.
Q2. During a site inspection, you find scale insects on a Japanese maple with sooty mold. The scales
are convex, brown, and about 3 mm in diameter. Which life stage timing is critical for an insect
growth regulator (IGR) application, and why?
A. Apply IGR during the egg stage to prevent hatching.
B. Apply IGR during the crawler stage when nymphs are mobile and feeding.
C. Apply IGR during the adult female stage to reduce fecundity.
D. Apply IGR during the prepupal stage to disrupt metamorphosis.
Correct Answer: B. Apply IGR during the crawler stage when nymphs are mobile and feeding.
Rationale: Scale insects are most vulnerable during the crawler stage, as they are mobile and actively
feeding before settling. IGRs like pyriproxyfen mimic juvenile hormone, preventing maturation. Eggs are
protected by the female scale cover, adults have reduced susceptibility, and scales do not have a prepupal
stage.
Why Wrong:
A - Eggs are protected under the female scale cover and IGRs have limited ovicidal activity.
C - Adult females are sessile and have reduced feeding; IGRs are less effective on adults.
D - Scale insects have incomplete metamorphosis without a prepupal stage.
Reference: Johnson, W.T. & Lyon, H.H. (2020). Insects That Feed on Trees and Shrubs, 3rd Ed., Cornell
University Press.
Page 2
,Q3. A golf course superintendent reports dollar spot on fairways despite regular fungicide
applications. Laboratory analysis shows the pathogen has a mutation in the ergosterol biosynthesis
pathway. Which management change would most effectively restore control?
A. Increase the application rate of the current DMI fungicide by 50%.
B. Switch to a fungicide with a different mode of action, such as a SDHI (FRAC 7).
C. Apply a multisite contact fungicide like chlorothalonil on a 7-day schedule.
D. Reduce nitrogen fertilization and increase mowing height.
Correct Answer: B. Switch to a fungicide with a different mode of action, such as a SDHI (FRAC 7).
Rationale: Dollar spot resistance to DMI fungicides (FRAC 3) is documented due to target-site
mutations. Switching to an SDHI (FRAC 7) provides a different mode of action, bypassing the resistance.
Increasing rate may not overcome resistance and can select for higher resistance. Contact fungicides may
help but are not curative. Cultural practices are supportive but insufficient alone to restore control.
Why Wrong:
A - Increasing rate of a DMI may not overcome target-site resistance and promotes cross-resistance.
C - Contact fungicides like chlorothalonil are protective, not curative, and do not address existing
resistance.
D - Cultural practices reduce disease pressure but do not overcome established fungicide resistance.
Reference: FRAC (2024). Fungicide Resistance Management; Latin, R. (2021). Turfgrass Disease
Management, APS Press.
Q4. A landscape company applies a granular preemergence herbicide to a bermudagrass lawn in
early April. In late May, significant crabgrass emergence is observed. What is the most likely cause
of failure?
A. The herbicide was applied too early, before the majority of crabgrass seeds germinated.
B. The herbicide was not watered in within 48 hours, leading to photodegradation.
C. The application rate was too low for the soil organic matter content.
D. The herbicide was applied after crabgrass had already germinated.
Correct Answer: C. The application rate was too low for the soil organic matter content.
Rationale: Preemergence herbicides bind to soil organic matter; insufficient rate for high OM reduces
efficacy. Crabgrass germination typically begins in late April/early May in Kentucky, so early April
application is appropriate. Most granular products require watering within 24-48 hours, but
photodegradation is less of an issue with granules. Application after germination would not control
emerged plants, but the scenario states application in April, which is before typical germination.
Why Wrong:
A - Early April application is standard timing for preemergence crabgrass control in Kentucky,
before germination.
B - Granular herbicides are less prone to photodegradation; watering is needed for activation but not
primarily to prevent photodegradation.
D - Application was in April, before typical crabgrass germination in Kentucky (late April/early
May).
Reference: Kentucky Pest Management Guide for Turfgrass (2024), Preemergence Herbicide Timing;
Extension Publication ID-128.
Page 3
, Q5. A landscape architect specifies a planting of 'Knock Out' roses in a site with a history of black
spot. Which integrated management approach would provide the most sustainable long-term
control?
A. Apply a protectant fungicide (chlorothalonil) every 7 days during the growing season.
B. Select a resistant cultivar and implement drip irrigation with proper spacing.
C. Apply a systemic fungicide (myclobutanil) at the first sign of leaf spots.
D. Remove all fallen leaves in autumn and apply a dormant fungicide spray.
Correct Answer: B. Select a resistant cultivar and implement drip irrigation with proper spacing.
Rationale: Resistant cultivars are the cornerstone of sustainable disease management. Drip irrigation
and proper spacing reduce leaf wetness, which is critical for black spot infection. Frequent fungicide
applications are not sustainable long-term and can lead to resistance or environmental harm. Sanitation
alone is insufficient without resistance.
Why Wrong:
A - Reliance on frequent protectant fungicides is not sustainable and may lead to environmental
issues or resistance.
C - Systemic fungicides used curatively can still allow disease development and promote resistance.
D - Sanitation reduces inoculum but does not prevent infection if the cultivar is susceptible and
conditions favor disease.
Reference: Daughtrey, M.L. & Benson, D.M. (2020). Principles of Plant Health Management for
Ornamental Plants, APS Press.
Q6. A turf manager needs to control white grubs in a tall fescue lawn. The soil temperature at
2-inch depth is 68°F, and the grubs are mostly second instars. Which insecticide active ingredient
and timing is most appropriate?
A. Apply imidacloprid in early June as a preventive treatment.
B. Apply trichlorfon in late July as a curative treatment.
C. Apply chlorantraniliprole in mid-August for residual control.
D. Apply carbaryl in early September when grubs are large.
Correct Answer: B. Apply trichlorfon in late July as a curative treatment.
Rationale: Second instars in late July indicate curative timing. Trichlorfon is a fast-acting
organophosphate effective against larger grubs. Imidacloprid is preventive and must be applied earlier
(June) when eggs are laid. Chlorantraniliprole is also preventive with residual, but mid-August is late for
optimal control. Carbaryl is less effective on larger grubs and has short residual.
Why Wrong:
A - Imidacloprid is preventive and should be applied before egg hatch (June), not when grubs are
already second instars.
C - Chlorantraniliprole is primarily preventive with long residual; mid-August is too late for optimal
control of existing grubs.
D - Carbaryl has short residual and is less effective on larger third-instar grubs; application in
September is too late.
Reference: Potter, D.A. (2020). Turfgrass Insect Pests: Biology and Management, University of Kentucky
Extension.
Page 4
- 2026/2027 Edition | 100 Verified Questions
Kentucky Category 3 Ornamental & Turf Pest Control Exam 2026-2027 QUESTIONS AND ANSWERS ALREADY
GRADED A+. 100% Verified Solutions | Updated Per Latest Guidelines | Graded A+
This comprehensive exam prep document covers all essential topics for the Kentucky Category 3
Ornamental & Turf Pest Control certification. It includes 100 verified questions with detailed
rationales, reflecting the latest 2026/2027 guidelines. Designed for professionals seeking licensure, this
resource ensures mastery of pest identification, pesticide application, and regulatory compliance.
Abstract:
This document provides a rigorous preparation tool for the Kentucky Category 3 Ornamental & Turf Pest Control
Exam, featuring 100 questions with verified answers and comprehensive rationales. Each question is designed to
test knowledge of pest biology, pesticide chemistry, application techniques, and regulatory compliance specific to
Kentucky. The rationales explain not only the correct answer but also why distractors are incorrect, reinforcing
deeper understanding. Content aligns with the latest 2026/2027 guidelines from the Kentucky Department of
Agriculture and EPA. Topics include turfgrass and ornamental plant pests, pesticide safety, IPM, and
environmental stewardship. This resource is ideal for candidates aiming for a high pass rate and professional
competence in pest control operations.
Content Area Overview:
Content Area Questions Key Topics Weight
Pest Identification and Biology 1-25 Turfgrass insects, ornamental pests, disease 25%
identification, weed species
Pesticide Chemistry and 26-45 Active ingredients, formulations, adjuvants, 20%
Formulations pesticide resistance
Application Equipment and 46-60 Sprayer types, nozzle selection, calibration 15%
Calibration math, droplet size
Integrated Pest Management 61-75 Monitoring, thresholds, cultural controls, 15%
(IPM) biological controls
Safety and Personal Protective 76-85 PPE selection, handling spills, first aid, 10%
Equipment pesticide storage
Regulations and Environmental 86-100 Kentucky pesticide laws, recordkeeping, 15%
Protection endangered species, water quality
Page 1
,Q1. A turf manager observes necrotic rings in a creeping bentgrass putting green during summer
stress. Microscopic examination reveals coenocytic hyphae and sporangia. Which fungicide mode of
action is most appropriate, and what application strategy minimizes resistance risk?
A. Apply a QoI fungicide (FRAC 11) as a solo product preventively every 14 days.
B. Apply a DMI fungicide (FRAC 3) curatively at the first sign of symptoms.
C. Apply a phosphonate fungicide (FRAC 33) in combination with a contact fungicide, alternating
with a different mode of action.
D. Apply a dicarboximide fungicide (FRAC 2) on a 7-day schedule during cool, wet weather.
Correct Answer: C. Apply a phosphonate fungicide (FRAC 33) in combination with a contact
fungicide, alternating with a different mode of action.
Rationale: The symptoms and microscopy suggest a Pythium blight (Oomycete) infection. Phosphonates
are effective against Oomycetes and are best used in combination with a contact fungicide to reduce
resistance risk. Alternating modes of action further delays resistance. QoI fungicides have high resistance
risk in Pythium and should not be used solo. DMI fungicides are ineffective against Oomycetes.
Dicarboximides are for other pathogens and ineffective against Pythium.
Why Wrong:
A - QoI fungicides have a high resistance risk in Pythium and should not be used as solo products
for curative control.
B - DMI fungicides target sterol biosynthesis and are ineffective against Oomycetes like Pythium.
D - Dicarboximides are used against Rhizoctonia and Sclerotinia, not Oomycetes, and resistance
management is poor with frequent applications.
Reference: Kentucky Pest Management Guide for Turfgrass (2024), Section on Pythium Blight; FRAC
Code List 2024.
Q2. During a site inspection, you find scale insects on a Japanese maple with sooty mold. The scales
are convex, brown, and about 3 mm in diameter. Which life stage timing is critical for an insect
growth regulator (IGR) application, and why?
A. Apply IGR during the egg stage to prevent hatching.
B. Apply IGR during the crawler stage when nymphs are mobile and feeding.
C. Apply IGR during the adult female stage to reduce fecundity.
D. Apply IGR during the prepupal stage to disrupt metamorphosis.
Correct Answer: B. Apply IGR during the crawler stage when nymphs are mobile and feeding.
Rationale: Scale insects are most vulnerable during the crawler stage, as they are mobile and actively
feeding before settling. IGRs like pyriproxyfen mimic juvenile hormone, preventing maturation. Eggs are
protected by the female scale cover, adults have reduced susceptibility, and scales do not have a prepupal
stage.
Why Wrong:
A - Eggs are protected under the female scale cover and IGRs have limited ovicidal activity.
C - Adult females are sessile and have reduced feeding; IGRs are less effective on adults.
D - Scale insects have incomplete metamorphosis without a prepupal stage.
Reference: Johnson, W.T. & Lyon, H.H. (2020). Insects That Feed on Trees and Shrubs, 3rd Ed., Cornell
University Press.
Page 2
,Q3. A golf course superintendent reports dollar spot on fairways despite regular fungicide
applications. Laboratory analysis shows the pathogen has a mutation in the ergosterol biosynthesis
pathway. Which management change would most effectively restore control?
A. Increase the application rate of the current DMI fungicide by 50%.
B. Switch to a fungicide with a different mode of action, such as a SDHI (FRAC 7).
C. Apply a multisite contact fungicide like chlorothalonil on a 7-day schedule.
D. Reduce nitrogen fertilization and increase mowing height.
Correct Answer: B. Switch to a fungicide with a different mode of action, such as a SDHI (FRAC 7).
Rationale: Dollar spot resistance to DMI fungicides (FRAC 3) is documented due to target-site
mutations. Switching to an SDHI (FRAC 7) provides a different mode of action, bypassing the resistance.
Increasing rate may not overcome resistance and can select for higher resistance. Contact fungicides may
help but are not curative. Cultural practices are supportive but insufficient alone to restore control.
Why Wrong:
A - Increasing rate of a DMI may not overcome target-site resistance and promotes cross-resistance.
C - Contact fungicides like chlorothalonil are protective, not curative, and do not address existing
resistance.
D - Cultural practices reduce disease pressure but do not overcome established fungicide resistance.
Reference: FRAC (2024). Fungicide Resistance Management; Latin, R. (2021). Turfgrass Disease
Management, APS Press.
Q4. A landscape company applies a granular preemergence herbicide to a bermudagrass lawn in
early April. In late May, significant crabgrass emergence is observed. What is the most likely cause
of failure?
A. The herbicide was applied too early, before the majority of crabgrass seeds germinated.
B. The herbicide was not watered in within 48 hours, leading to photodegradation.
C. The application rate was too low for the soil organic matter content.
D. The herbicide was applied after crabgrass had already germinated.
Correct Answer: C. The application rate was too low for the soil organic matter content.
Rationale: Preemergence herbicides bind to soil organic matter; insufficient rate for high OM reduces
efficacy. Crabgrass germination typically begins in late April/early May in Kentucky, so early April
application is appropriate. Most granular products require watering within 24-48 hours, but
photodegradation is less of an issue with granules. Application after germination would not control
emerged plants, but the scenario states application in April, which is before typical germination.
Why Wrong:
A - Early April application is standard timing for preemergence crabgrass control in Kentucky,
before germination.
B - Granular herbicides are less prone to photodegradation; watering is needed for activation but not
primarily to prevent photodegradation.
D - Application was in April, before typical crabgrass germination in Kentucky (late April/early
May).
Reference: Kentucky Pest Management Guide for Turfgrass (2024), Preemergence Herbicide Timing;
Extension Publication ID-128.
Page 3
, Q5. A landscape architect specifies a planting of 'Knock Out' roses in a site with a history of black
spot. Which integrated management approach would provide the most sustainable long-term
control?
A. Apply a protectant fungicide (chlorothalonil) every 7 days during the growing season.
B. Select a resistant cultivar and implement drip irrigation with proper spacing.
C. Apply a systemic fungicide (myclobutanil) at the first sign of leaf spots.
D. Remove all fallen leaves in autumn and apply a dormant fungicide spray.
Correct Answer: B. Select a resistant cultivar and implement drip irrigation with proper spacing.
Rationale: Resistant cultivars are the cornerstone of sustainable disease management. Drip irrigation
and proper spacing reduce leaf wetness, which is critical for black spot infection. Frequent fungicide
applications are not sustainable long-term and can lead to resistance or environmental harm. Sanitation
alone is insufficient without resistance.
Why Wrong:
A - Reliance on frequent protectant fungicides is not sustainable and may lead to environmental
issues or resistance.
C - Systemic fungicides used curatively can still allow disease development and promote resistance.
D - Sanitation reduces inoculum but does not prevent infection if the cultivar is susceptible and
conditions favor disease.
Reference: Daughtrey, M.L. & Benson, D.M. (2020). Principles of Plant Health Management for
Ornamental Plants, APS Press.
Q6. A turf manager needs to control white grubs in a tall fescue lawn. The soil temperature at
2-inch depth is 68°F, and the grubs are mostly second instars. Which insecticide active ingredient
and timing is most appropriate?
A. Apply imidacloprid in early June as a preventive treatment.
B. Apply trichlorfon in late July as a curative treatment.
C. Apply chlorantraniliprole in mid-August for residual control.
D. Apply carbaryl in early September when grubs are large.
Correct Answer: B. Apply trichlorfon in late July as a curative treatment.
Rationale: Second instars in late July indicate curative timing. Trichlorfon is a fast-acting
organophosphate effective against larger grubs. Imidacloprid is preventive and must be applied earlier
(June) when eggs are laid. Chlorantraniliprole is also preventive with residual, but mid-August is late for
optimal control. Carbaryl is less effective on larger grubs and has short residual.
Why Wrong:
A - Imidacloprid is preventive and should be applied before egg hatch (June), not when grubs are
already second instars.
C - Chlorantraniliprole is primarily preventive with long residual; mid-August is too late for optimal
control of existing grubs.
D - Carbaryl has short residual and is less effective on larger third-instar grubs; application in
September is too late.
Reference: Potter, D.A. (2020). Turfgrass Insect Pests: Biology and Management, University of Kentucky
Extension.
Page 4
