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New York Category 3A (Ornamental, Turf, and Interior
Landscape) Commercial Pesticide Applicator Certification
Exam | Latest Verified Questions and Detailed Answers
OVERVIEW DESCRIPTION:
This Comprehensive set of multiple choice questions is designed for the New York Category
3A (Ornamental, Turf, and Interior Landscape) commercial pesticide applicator
certification exam. Administered by the New York State Department of Environmental
Conservation (NYSDEC), the exam assesses practical knowledge across pest identification
and biology, integrated pest management (IPM) strategies, pesticide label comprehension
and personal protective equipment requirements, application equipment operation and
calibration, environmental and pollinator safety, and accurate area and dosage calculations.
The content covers the management of common weeds, insect pests, and diseases affecting
trees, shrubs, flowers, and turfgrass, as well as proper pesticide storage, disposal, spill
response, and the protection of beneficial organisms.
QUESTION 1
Which of the following turfgrass weeds is a summer annual that germinates after soil
temperatures reach about 55–60°F and has a characteristic prostrate growth habit with
smooth, light green leaves?
A) Annual bluegrass
B) Common chickweed
C) Smooth crabgrass
D) White clover
CORRECT ANSWER: C
EXPERT RATIONALE: Smooth crabgrass is a warm-season summer annual that
germinates in late spring. Annual bluegrass is a winter annual, chickweed a winter
annual, and white clover a perennial.
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QUESTION 2
Dandelion is best described as a:
A) Summer annual
B) Winter annual
C) Biennial
D) Perennial
CORRECT ANSWER: D
EXPERT RATIONALE: Dandelion is a perennial broadleaf weed with a deep taproot,
regrowing from root crowns each year. It does not complete its life cycle in one or two
seasons.
QUESTION 3
Which turf disease produces circular, straw-colored patches up to 6 inches in diameter,
with lesions on individual leaf blades that have a tan center and dark border, especially
under low nitrogen fertility?
A) Brown patch
B) Dollar spot
C) Pythium blight
D) Red thread
CORRECT ANSWER: B
EXPERT RATIONALE: Dollar spot appears as small, bleached patches and hourglass-
shaped leaf lesions. Brown patch causes larger blighted areas, Pythium blight appears
greasy, and red thread shows pink mycelium.
QUESTION 4
White grubs found in New York lawns are most often the larvae of:
A) Chinch bugs
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B) Japanese beetles
C) Sod webworms
D) Billbugs
CORRECT ANSWER: B
EXPERT RATIONALE: Japanese beetle grubs are common white grubs in turf. Chinch
bugs are sap-sucking insects, sod webworms are caterpillars, and billbug larvae are
legless weevil grubs.
QUESTION 5
Which insect pest of turf causes irregular, yellow-to-brown patches that pull away easily,
and inspection reveals black, shiny adults and reddish nymphs within the thatch?
A) White grubs
B) Chinch bugs
C) Cutworms
D) Leafhoppers
CORRECT ANSWER: B
EXPERT RATIONALE: Chinch bugs feed by sucking sap, causing wilted, dead patches;
they are often found in thatch. White grubs chew roots, cutworms sever stems,
leafhoppers are not typical turf pests.
QUESTION 6
The primary symptom of iron chlorosis in ornamental trees and shrubs is:
A) Marginal leaf scorch
B) Interveinal yellowing of young leaves
C) Purple leaf coloration
D) Wilting of entire branches
CORRECT ANSWER: B
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EXPERT RATIONALE: Iron deficiency causes chlorosis between veins on new growth
because iron is immobile in plants. Marginal scorch indicates salt or water stress, purple
may be phosphorus deficiency, wilting suggests root or vascular issues.
QUESTION 7
Which pathogen causes the white, powdery fungal growth on leaves of roses, lilacs, and
phlox, especially in dry, shaded conditions?
A) Botrytis cinerea
B) Diplocarpon rosae
C) Various species of Erysiphales
D) Rhizoctonia solani
CORRECT ANSWER: C
EXPERT RATIONALE: Powdery mildew fungi (order Erysiphales) produce superficial white
mycelium on leaves. Botrytis causes gray mold, Diplocarpon causes rose black spot, and
Rhizoctonia causes root/stem rots.
QUESTION 8
A client reports a thick, dark-green, semicircular ring in their lawn that sometimes
produces mushrooms. This is most likely:
A) Brown patch
B) Necrotic ring spot
C) Fairy ring
D) Take-all patch
CORRECT ANSWER: C
EXPERT RATIONALE: Fairy ring forms circles or arcs of stimulated grass growth due to
fungal breakdown of organic matter, often with fruiting bodies (mushrooms). The other
diseases cause blighted or dead patches.
New York Category 3A (Ornamental, Turf, and Interior
Landscape) Commercial Pesticide Applicator Certification
Exam | Latest Verified Questions and Detailed Answers
OVERVIEW DESCRIPTION:
This Comprehensive set of multiple choice questions is designed for the New York Category
3A (Ornamental, Turf, and Interior Landscape) commercial pesticide applicator
certification exam. Administered by the New York State Department of Environmental
Conservation (NYSDEC), the exam assesses practical knowledge across pest identification
and biology, integrated pest management (IPM) strategies, pesticide label comprehension
and personal protective equipment requirements, application equipment operation and
calibration, environmental and pollinator safety, and accurate area and dosage calculations.
The content covers the management of common weeds, insect pests, and diseases affecting
trees, shrubs, flowers, and turfgrass, as well as proper pesticide storage, disposal, spill
response, and the protection of beneficial organisms.
QUESTION 1
Which of the following turfgrass weeds is a summer annual that germinates after soil
temperatures reach about 55–60°F and has a characteristic prostrate growth habit with
smooth, light green leaves?
A) Annual bluegrass
B) Common chickweed
C) Smooth crabgrass
D) White clover
CORRECT ANSWER: C
EXPERT RATIONALE: Smooth crabgrass is a warm-season summer annual that
germinates in late spring. Annual bluegrass is a winter annual, chickweed a winter
annual, and white clover a perennial.
,2|Page
QUESTION 2
Dandelion is best described as a:
A) Summer annual
B) Winter annual
C) Biennial
D) Perennial
CORRECT ANSWER: D
EXPERT RATIONALE: Dandelion is a perennial broadleaf weed with a deep taproot,
regrowing from root crowns each year. It does not complete its life cycle in one or two
seasons.
QUESTION 3
Which turf disease produces circular, straw-colored patches up to 6 inches in diameter,
with lesions on individual leaf blades that have a tan center and dark border, especially
under low nitrogen fertility?
A) Brown patch
B) Dollar spot
C) Pythium blight
D) Red thread
CORRECT ANSWER: B
EXPERT RATIONALE: Dollar spot appears as small, bleached patches and hourglass-
shaped leaf lesions. Brown patch causes larger blighted areas, Pythium blight appears
greasy, and red thread shows pink mycelium.
QUESTION 4
White grubs found in New York lawns are most often the larvae of:
A) Chinch bugs
,3|Page
B) Japanese beetles
C) Sod webworms
D) Billbugs
CORRECT ANSWER: B
EXPERT RATIONALE: Japanese beetle grubs are common white grubs in turf. Chinch
bugs are sap-sucking insects, sod webworms are caterpillars, and billbug larvae are
legless weevil grubs.
QUESTION 5
Which insect pest of turf causes irregular, yellow-to-brown patches that pull away easily,
and inspection reveals black, shiny adults and reddish nymphs within the thatch?
A) White grubs
B) Chinch bugs
C) Cutworms
D) Leafhoppers
CORRECT ANSWER: B
EXPERT RATIONALE: Chinch bugs feed by sucking sap, causing wilted, dead patches;
they are often found in thatch. White grubs chew roots, cutworms sever stems,
leafhoppers are not typical turf pests.
QUESTION 6
The primary symptom of iron chlorosis in ornamental trees and shrubs is:
A) Marginal leaf scorch
B) Interveinal yellowing of young leaves
C) Purple leaf coloration
D) Wilting of entire branches
CORRECT ANSWER: B
, 4|Page
EXPERT RATIONALE: Iron deficiency causes chlorosis between veins on new growth
because iron is immobile in plants. Marginal scorch indicates salt or water stress, purple
may be phosphorus deficiency, wilting suggests root or vascular issues.
QUESTION 7
Which pathogen causes the white, powdery fungal growth on leaves of roses, lilacs, and
phlox, especially in dry, shaded conditions?
A) Botrytis cinerea
B) Diplocarpon rosae
C) Various species of Erysiphales
D) Rhizoctonia solani
CORRECT ANSWER: C
EXPERT RATIONALE: Powdery mildew fungi (order Erysiphales) produce superficial white
mycelium on leaves. Botrytis causes gray mold, Diplocarpon causes rose black spot, and
Rhizoctonia causes root/stem rots.
QUESTION 8
A client reports a thick, dark-green, semicircular ring in their lawn that sometimes
produces mushrooms. This is most likely:
A) Brown patch
B) Necrotic ring spot
C) Fairy ring
D) Take-all patch
CORRECT ANSWER: C
EXPERT RATIONALE: Fairy ring forms circles or arcs of stimulated grass growth due to
fungal breakdown of organic matter, often with fruiting bodies (mushrooms). The other
diseases cause blighted or dead patches.
