National Core Manual questions plus Ohio law questions. Not every state rule is covered, so also study your state manual's law section.
WARNING corresponds to Category II, moderately toxic. The other choices describe Categories I, III, and IV rather than the WARNING category.
National Core Manual, 2nd ed., 2014 · Ch. 5 Pesticide Hazards and First Aid · p. 91
Illness soon after a single substantial exposure fits an acute effect. The scenario does not establish repeated exposure, a long delay, or allergic sensitization.
National Core Manual, 2nd ed., 2014 · Ch. 5 Pesticide Hazards and First Aid · p. 90
(60 × 40) + (30 × 20) = 2,400 + 600 = 3,000 sq ft. Counting only the larger rectangle gives 2,400 sq ft and misses part of the site.
National Core Manual, 2nd ed., 2014 · Ch. 11 Pesticide Application Procedures · p. 179
Responders need to locate chemicals, gain access, isolate utilities, and anticipate movement toward drains and water. Office, sales-route, and supplier information does not supply that hazard map.
National Core Manual, 2nd ed., 2014 · Ch. 9 Emergency or Incident Response · p. 151
Threshold-based treatment reduces unnecessary pesticide selection pressure. Fixed intervals, brand changes within one mode of action, or premature retreatment can add exposure without a demonstrated need.
National Core Manual, 2nd ed., 2014 · Ch. 1 Pest Management · p. 30
The greatest acute systemic or contact hazard determines the signal word. An average, the most common exposure route, or the amount applied does not replace that basis.
National Core Manual, 2nd ed., 2014 · Ch. 5 Pesticide Hazards and First Aid · p. 91
Under § 921.06(D)(2), commercial applications must stay within the applicator's licensed categories. Continuing education for renewal does not by itself add a new category to the license.
Ohio Revised Code Chapter 921 · § 921.06(D)(2)
Directions for Use covers sites, mixing, and application rates. Establishment, contact, and net contents information serves other purposes.
National Core Manual, 2nd ed., 2014 · Ch. 3 Pesticide Labeling · p. 56
Staff reporting can reveal suspicious access or missing products despite intact locks. Restricted awareness, delivery totals, or waiting for visible lock damage leaves gaps in security.
National Core Manual, 2nd ed., 2014 · Ch. 8 Transportation, Storage, and Security · p. 146
Saturated ground and heavy rain can increase pesticide transport in runoff. Photodegradation, adsorption, and volatilization do not describe that surface-water pathway.
National Core Manual, 2nd ed., 2014 · Ch. 7 Pesticides in the Environment · p. 128
A lower appropriate release height shortens airborne travel. It does not itself coarsen the spray or change the pesticide's vapor pressure.
National Core Manual, 2nd ed., 2014 · Ch. 7 Pesticides in the Environment · p. 125
Category IV may bear CAUTION or have no signal word. DANGER and WARNING identify higher acute hazard categories.
National Core Manual, 2nd ed., 2014 · Ch. 5 Pesticide Hazards and First Aid · p. 91
Eating contaminated prey is secondary poisoning. Direct bait ingestion, contact with deposits, and breathing vapor are different routes.
National Core Manual, 2nd ed., 2014 · Ch. 7 Pesticides in the Environment · p. 134
Runoff from many treated fields is a dispersed nonpoint source. A single tank, connection, or outlet would be a point source.
National Core Manual, 2nd ed., 2014 · Ch. 7 Pesticides in the Environment · p. 128
The loose closure and exterior residue need correction to avoid leakage and exposure. The other findings describe suitable container or loading conditions.
National Core Manual, 2nd ed., 2014 · Ch. 8 Transportation, Storage, and Security · p. 140
LD50 is a lethal dose for 50% of the test population. It does not measure any symptom, a concentration in air or water, or a safe repeated-exposure level.
National Core Manual, 2nd ed., 2014 · Ch. 5 Pesticide Hazards and First Aid · p. 90
An antidote must be appropriate for the pesticide, and misuse can be dangerous. It is not a preventive tolerance treatment, and similar symptoms or severity alone do not identify the right antidote.
National Core Manual, 2nd ed., 2014 · Ch. 5 Pesticide Hazards and First Aid · p. 99
Layers and sludge indicate physical incompatibility. They do not establish activation, a pressure-based remedy, or controlled release.
National Core Manual, 2nd ed., 2014 · Ch. 10 Planning the Pesticide Application · p. 160
The blue section indicates health hazard. Fire, instability, and special hazards are represented in the other sections.
National Core Manual, 2nd ed., 2014 · Ch. 9 Emergency or Incident Response · p. 154
Repeated exposures can reduce cholinesterase available for normal nerve function. Lack of symptoms does not establish recovery or protective tolerance, and the effect is not confined to skin.
National Core Manual, 2nd ed., 2014 · Ch. 5 Pesticide Hazards and First Aid · p. 95
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Expect several questions on what the signal word tells you. It reflects the product’s acute toxicity by its most hazardous route of exposure (swallowed, through the skin or inhaled) or its potential for eye and skin injury. It says nothing about long-term effects.
LD50 is the dose that killed half the test animals, in milligrams per kilogram of body weight. The smaller the number, the less it takes, so the more toxic the product.
Skull and crossbones; “poison” in red. Based on oral, dermal or inhalation toxicity.
No skull and crossbones. Can cause permanent damage to skin, eyes or lungs.
Or moderate eye and skin irritation.
Or slight eye and skin irritation. Class IV products need no signal word, though many still say CAUTION.
Labels name the formulation by its letters. Know what each one is and what it needs in the tank: agitation, extra care with dust, or nothing at all.
| Code | Formulation | Remember |
|---|---|---|
| EC / E | Emulsifiable concentrate | Oil-based liquid that forms a milky emulsion in water. |
| S | Solution | Dissolves completely; little or no agitation needed. |
| RTU | Ready-to-use | Already diluted; apply as packaged. |
| F / AF | Flowable | Solid particles suspended in liquid; needs agitation. |
| A | Aerosol | Active ingredient in a solvent, usually at a low percentage. |
| D | Dust | Dry, fine particles; high drift and inhalation risk. |
| G | Granules | Applied dry, often with a spreader; low drift. |
| P / PS | Pellets | Like granules, but particles are uniform in weight and shape. |
| WP / W | Wettable powder | Suspends in water; constant agitation; inhalation risk while mixing. |
| WDG / DF | Water-dispersible granules / dry flowable | Like a wettable powder with less dust. |
| SP / WSP | Soluble powder | Dissolves in water to form a true solution. |
| B | Bait | Active ingredient mixed with food or another attractant. |
| M | Microencapsulated | Coated particles or droplets mixed with water and sprayed; can release slowly. |
Most core exams include a few math questions. They rarely need more than multiplication and division, but units trip people up. Write every unit down and cancel it as you go.
The label rate is 2 pints per acre. Your sprayer is calibrated to apply 20 gallons per acre and the tank holds 100 gallons. How much product goes in a full tank?
A lawn measures 150 ft × 100 ft. The label calls for 1.5 fl oz per 1,000 sq ft. How much product do you need?
Ohio Commercial Core tests general pesticide application knowledge through 90 closed-book questions, and the Ohio Department of Agriculture (ODA) requires 70% to pass. ODA treats Core and category examinations separately, so identify your application category before ordering books. Ornamental Pest Control is Category 6A, turf applications fall under Category 8, and General Pest Control is Category 10A. Use ODA's commercial applicator page to match your intended work to the right category and plan that study alongside Core.
Order the Commercial Core Manual Bundle from Ohio State University: 825B in print or e825B as a paid PDF. The bundle brings together Applying Pesticides Correctly, Ohio pesticide laws and rules, and the Safety Training Guide for Trained Servicepersons. OSU lists the Core text as copyright 1990, reprinted March 31, 2020, and the safety guide as copyright 2023. The listed prices are $25.50 for print and $16.75 for the PDF. Chapter sample tests are included in the purchased material; use them to identify sections that need another reading.
For legal requirements, open ODA's current Laws and Rules page and review ORC Chapter 921 and OAC Chapter 901:5-11. Check effective dates so you distinguish rules already in force from future changes. If you use free background readings, check their dates and scope: Wyoming Extension's Core adaptation is based on OSU Bulletin 825 from 1992, and OSU's free safety guide dates to 2007/2011. Use those older publications for fundamentals, then return to the current Ohio bundle and ODA's law page for your state preparation.
The questions here cover national core manual knowledge; use the current Ohio bundle and official laws and rules for the full Ohio syllabus and state requirements. Review labels, safety precautions, equipment decisions and calculations in small groups. After each set, explain your mistakes in your own words and find the matching section in your reading. Keep a separate list of Ohio legal details to revisit rather than assuming a strong general practice score means you have finished studying state law or your category.
ODA inspectors supervise exams at Ohio testing locations. ODA lists no examination fee, while license application fees are separate. Its exam page says a session allows time for multiple examinations; ask ODA about the time available for your planned combination when arranging attendance. Use that page for registration and session instructions instead of choosing a Core countdown from another state's exam. Before traveling, check your appointment details, make sure you selected Commercial Core and the intended categories, and prepare to answer without consulting books.
Closed-book exam. Exams are given by Ohio Department of Agriculture inspectors at Ohio test sites.
Manual Applying Pesticides Correctly / Commercial Core Manual Bundle (825B / e825B), Core ©1990; reprinted March 31, 2020; safety guide ©2023
Manual Ohio Pesticide Laws and Rules, Current effective ORC Chapter 921 and OAC Chapter 901:5-11
ODA lists 90 questions, 70% to pass, closed-book testing and no examination fee; license application fees are separate. Ask ODA how much time is available for your exams. The on-site session allows multiple exams. Current Core bundle: 825B print $25.50 / e825B PDF $16.75. The free Wyoming adaptation derives from OSU 825 (1992), and the free OSU safety guide is ©2007/2011; use them for background study alongside the current bundle. Use the ODA pesticides/laws-and-rules URL for current law, not the obsolete plant-health/laws-and-rules link.
ODA lists 90 questions and a 70% passing score for Commercial Core.
Ohio examinations are closed book. Read the ODA applicator-exams instructions for the session you register for.
ODA lists no examination fee. The license application fee is separate; free testing does not mean a free license.
The designated bundle is 825B in print ($25.50) or e825B as a paid PDF ($16.75). It includes the Core text, Ohio laws and rules, and the safety training guide. The catalog lists Core ©1990, reprinted March 31, 2020, and safety guide ©2023.
Use ODA's current Laws and Rules page for ORC Chapter 921 and OAC Chapter 901:5-11. The OSU Commercial Core Manual Bundle also includes Ohio pesticide laws and rules.