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Idaho Commercial Applicator Certification – Right-
of-Way Pest Control Exam COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST UPDATE THIS
YEAR-JUST RELEASED
Idaho Commercial Applicator Certification – Right-of-Way Pest Control Exam. The format follows your
requested style: summarized point-form coverage followed by 250 MCQs with rationales in random
order.
Exam Coverage (Summarized Point Form)
• Idaho Pesticide Laws and Regulations – Idaho Code Title 22, Chapter 34; IDAPA 02.03.03
(Pesticide Rules), 02.03.03.400 (ROW specific)
• Certification & Licensing – Commercial Applicator requirements: $50 application, $50 exam, $75
certification; 3-year cycle; 24 CEUs per cycle (min 5 each: laws/safety/environment; general
pest; ROW)
• Pesticide Safety – LD50, signal words, PPE (minimum: coveralls, chemical-resistant gloves,
boots, goggles), REI, PHI (not typical for ROW)
• ROW Pest Identification – Weeds: musk thistle, Canada thistle, spotted knapweed, leafy spurge,
Dalmatian toadflax, yellow toadflax, rush skeletonweed, whitetop (hoary cress), poison
hemlock, Johnsongrass; Woody plants: Russian olive, saltcedar (tamarisk)
• Insects in ROW – Grasshoppers, Mormon cricket, clearwing borers, defoliators
• Vegetation Management Methods – Mechanical (mowing, grubbing), cultural, biological,
chemical
• Herbicide Mode of Action – Growth regulators (2,4-D, dicamba), ALS inhibitors (sulfonylureas,
imazapyr), EPSP synthase (glyphosate), synthetic auxin, cellulose inhibitors
• Application Techniques – Broadcast, spot treatment, basal bark, cut stump, frill/girdle, foliar,
injection
• Calibration – Boom sprayer, granular spreader, handgun, backpack; GPA, output per 1000 sq ft
• Drift Management – Temperature inversion, droplet size, buffer zones, wind speed limits
(Idaho: max 15 mph for ROW)
• Environmental Protection – Surface water (minimum 25–50 ft buffer from streams),
groundwater (well setbacks 150 ft for mixing, 50 ft from target), endangered species (Idaho:
salmon, steelhead, bull trout, sockeye)
• ROW-specific Rules – Clear zones (roadside safety area – 8–10 ft from pavement), no herbicide
application on bare ground within 50 ft of streams without specific permits
• Worker Protection Standard (WPS) – Applies to ROW only if area is maintained by commercial
applicator and workers enter treated area; pesticide safety training, decontamination,
emergency assistance
• Recordkeeping – Idaho requires 3 years; includes date, location, target pest, product, rate,
applicator name, certification number
• Invasive Species – Idaho noxious weed list (42 species), state quarantine; weed management
areas (WMAs)
• Transportation & Storage – Secured loads, DOT requirements for RUP, storage facility
placarding
• Poisoning/First Aid – Pesticide poisoning symptoms, emergency procedures, SDS access
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• Spill Response – Contain, notify Idaho Dept of Ag (208-332-8620), decontaminate
• Public Relations – Notification of adjacent property owners (Idaho recommends 24–48 hours for
RUP applications on ROW), complaint procedures
• Application Timing – Phenology-based (target growth stages: bud, bolting, flowering)
Questions 1–250 (Random Order, with Rationales)
Question 1
When applying herbicides on an Idaho roadside, what is the minimum clear zone distance from the
pavement edge where bare ground treatment is generally prohibited unless specified otherwise?
A) 2 ft
B) 5 ft
C) 8–10 ft
D) 25 ft
Answer: C – The clear zone (8–10 ft from the pavement edge) is maintained for safety and to avoid
herbicide off-target movement; bare ground treatment is typically restricted in this area.
Question 2
Which of the following is a biennial weed commonly found on Idaho rights-of-way that forms a rosette
in its first year and bolts in the second?
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A) Spotted knapweed
B) Musk thistle
C) Leafy spurge
D) Rush skeletonweed
Answer: B – Musk thistle (Carduus nutans) is a biennial; it grows as a rosette the first year and produces
flowering stalks the second.
Question 3
What is the maximum allowable wind speed for herbicide application on Idaho rights-of-way to
minimize drift?
A) 5 mph
B) 10 mph
C) 15 mph
D) 20 mph
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Answer: C – Idaho Department of Agriculture regulations state that no pesticide shall be applied when
wind speed exceeds 15 mph.
Question 4
Which herbicide mode of action is considered a “growth regulator” (synthetic auxin) and is commonly
used for broadleaf weed control in ROW?
A) Glyphosate
B) 2,4-D
C) Imazapyr
D) Sulfometuron
Answer: B – 2,4-D is a synthetic auxin that disrupts plant growth hormones, primarily controlling
broadleaf weeds.
Question 5
In Idaho, a commercial applicator renewing a ROW certification must earn how many continuing
Idaho Commercial Applicator Certification – Right-
of-Way Pest Control Exam COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST UPDATE THIS
YEAR-JUST RELEASED
Idaho Commercial Applicator Certification – Right-of-Way Pest Control Exam. The format follows your
requested style: summarized point-form coverage followed by 250 MCQs with rationales in random
order.
Exam Coverage (Summarized Point Form)
• Idaho Pesticide Laws and Regulations – Idaho Code Title 22, Chapter 34; IDAPA 02.03.03
(Pesticide Rules), 02.03.03.400 (ROW specific)
• Certification & Licensing – Commercial Applicator requirements: $50 application, $50 exam, $75
certification; 3-year cycle; 24 CEUs per cycle (min 5 each: laws/safety/environment; general
pest; ROW)
• Pesticide Safety – LD50, signal words, PPE (minimum: coveralls, chemical-resistant gloves,
boots, goggles), REI, PHI (not typical for ROW)
• ROW Pest Identification – Weeds: musk thistle, Canada thistle, spotted knapweed, leafy spurge,
Dalmatian toadflax, yellow toadflax, rush skeletonweed, whitetop (hoary cress), poison
hemlock, Johnsongrass; Woody plants: Russian olive, saltcedar (tamarisk)
• Insects in ROW – Grasshoppers, Mormon cricket, clearwing borers, defoliators
• Vegetation Management Methods – Mechanical (mowing, grubbing), cultural, biological,
chemical
• Herbicide Mode of Action – Growth regulators (2,4-D, dicamba), ALS inhibitors (sulfonylureas,
imazapyr), EPSP synthase (glyphosate), synthetic auxin, cellulose inhibitors
• Application Techniques – Broadcast, spot treatment, basal bark, cut stump, frill/girdle, foliar,
injection
• Calibration – Boom sprayer, granular spreader, handgun, backpack; GPA, output per 1000 sq ft
• Drift Management – Temperature inversion, droplet size, buffer zones, wind speed limits
(Idaho: max 15 mph for ROW)
• Environmental Protection – Surface water (minimum 25–50 ft buffer from streams),
groundwater (well setbacks 150 ft for mixing, 50 ft from target), endangered species (Idaho:
salmon, steelhead, bull trout, sockeye)
• ROW-specific Rules – Clear zones (roadside safety area – 8–10 ft from pavement), no herbicide
application on bare ground within 50 ft of streams without specific permits
• Worker Protection Standard (WPS) – Applies to ROW only if area is maintained by commercial
applicator and workers enter treated area; pesticide safety training, decontamination,
emergency assistance
• Recordkeeping – Idaho requires 3 years; includes date, location, target pest, product, rate,
applicator name, certification number
• Invasive Species – Idaho noxious weed list (42 species), state quarantine; weed management
areas (WMAs)
• Transportation & Storage – Secured loads, DOT requirements for RUP, storage facility
placarding
• Poisoning/First Aid – Pesticide poisoning symptoms, emergency procedures, SDS access
, Page 2 of 154
• Spill Response – Contain, notify Idaho Dept of Ag (208-332-8620), decontaminate
• Public Relations – Notification of adjacent property owners (Idaho recommends 24–48 hours for
RUP applications on ROW), complaint procedures
• Application Timing – Phenology-based (target growth stages: bud, bolting, flowering)
Questions 1–250 (Random Order, with Rationales)
Question 1
When applying herbicides on an Idaho roadside, what is the minimum clear zone distance from the
pavement edge where bare ground treatment is generally prohibited unless specified otherwise?
A) 2 ft
B) 5 ft
C) 8–10 ft
D) 25 ft
Answer: C – The clear zone (8–10 ft from the pavement edge) is maintained for safety and to avoid
herbicide off-target movement; bare ground treatment is typically restricted in this area.
Question 2
Which of the following is a biennial weed commonly found on Idaho rights-of-way that forms a rosette
in its first year and bolts in the second?
, Page 3 of 154
A) Spotted knapweed
B) Musk thistle
C) Leafy spurge
D) Rush skeletonweed
Answer: B – Musk thistle (Carduus nutans) is a biennial; it grows as a rosette the first year and produces
flowering stalks the second.
Question 3
What is the maximum allowable wind speed for herbicide application on Idaho rights-of-way to
minimize drift?
A) 5 mph
B) 10 mph
C) 15 mph
D) 20 mph
, Page 4 of 154
Answer: C – Idaho Department of Agriculture regulations state that no pesticide shall be applied when
wind speed exceeds 15 mph.
Question 4
Which herbicide mode of action is considered a “growth regulator” (synthetic auxin) and is commonly
used for broadleaf weed control in ROW?
A) Glyphosate
B) 2,4-D
C) Imazapyr
D) Sulfometuron
Answer: B – 2,4-D is a synthetic auxin that disrupts plant growth hormones, primarily controlling
broadleaf weeds.
Question 5
In Idaho, a commercial applicator renewing a ROW certification must earn how many continuing
