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GUAM COMMERCIAL PESTICIDE APPLICATORS EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSW, Exams of Agricultural engineering

University of Guam (UOG)Agricultural engineering

GUAM COMMERCIAL PESTICIDE APPLICATORS EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2025

Typology: Exams

2024/2025

Available from 06/29/2025

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GUAM COMMERCIAL PESTICIDE
APPLICATORS EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2025
1. What is the primary federal law regulating pesticide use in the United
States, including Guam?
Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA)
FIFRA governs pesticide registration, distribution, sale, and use to
ensure safe handling and application.
2. Which label section provides specific instructions for safe use and
application of a pesticide?
Directions for Use
This section details how to properly and safely apply the pesticide,
including target pests and application rates.
3. What is the best way to prevent pesticide drift during application?
Apply pesticides during calm weather conditions
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Download GUAM COMMERCIAL PESTICIDE APPLICATORS EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSW and more Exams Agricultural engineering in PDF only on Docsity!

GUAM COMMERCIAL PESTICIDE

APPLICATORS EXAM QUESTIONS AND

CORRECT ANSWERS (VERIFIED

ANSWERS) PLUS RATIONALES 2025

  1. What is the primary federal law regulating pesticide use in the United States, including Guam? Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) FIFRA governs pesticide registration, distribution, sale, and use to ensure safe handling and application.
  2. Which label section provides specific instructions for safe use and application of a pesticide? Directions for Use This section details how to properly and safely apply the pesticide, including target pests and application rates.
  3. What is the best way to prevent pesticide drift during application? Apply pesticides during calm weather conditions

Calm weather reduces the risk of pesticide particles drifting to unintended areas.

  1. How often should pesticide application equipment be calibrated? At least once a year or when adjustments are made Calibration ensures accurate application rates, preventing over- or under-application.
  2. What personal protective equipment (PPE) is generally required when handling pesticides? Gloves, protective clothing, eye protection, and respirators as specified on the label PPE protects applicators from exposure to harmful chemicals.
  3. What is the minimum age for a commercial pesticide applicator certification in most jurisdictions? 18 years old Most programs require applicators to be at least 18 due to safety and legal responsibilities.
  4. Which of the following best describes the term “pesticide”? Any substance intended to prevent, destroy, repel, or mitigate pests This includes herbicides, insecticides, fungicides, rodenticides, and others.
  5. Why is it important to never use a pesticide after its expiration date? The product may be ineffective or unsafe

To protect human health and the environment The EPA registers pesticides and sets standards to minimize risks.

  1. What is an example of a mechanical pest control method? Using traps Mechanical controls physically remove or exclude pests without chemicals.
  2. When mixing pesticides, why should you add pesticides to water rather than water to pesticides? To prevent splashing and reduce risk of exposure Adding pesticides to water minimizes splashes and improves safety.
  3. What should be done with leftover pesticide mixtures after application? Dispose of according to label instructions or local regulations Proper disposal prevents environmental contamination.
  4. How should empty pesticide containers be handled? Triple rinse and dispose or recycle according to label directions Triple rinsing removes residue, making containers safer to handle.
  5. What is an example of a biological pesticide? Bacillus thuringiensis (Bt) Bt is a bacterium used to control certain insect larvae.
  6. Which pest management strategy integrates multiple control methods?

Integrated Pest Management (IPM) IPM uses cultural, biological, mechanical, and chemical controls to minimize pest damage.

  1. How can applicators reduce pesticide contamination of groundwater? Avoid applying pesticides near wells and use proper application rates Groundwater contamination can occur through leaching or runoff.
  2. What is the main function of a surfactant in a pesticide formulation? To improve spreading and sticking of the pesticide Surfactants help pesticides adhere to plant surfaces for better effectiveness.
  3. What is the recommended action if pesticide exposure occurs to skin? Remove contaminated clothing and wash skin immediately with soap and water Quick removal and washing reduce chemical absorption.
  4. What information does the Material Safety Data Sheet (MSDS) provide? Hazardous properties and safety precautions of a pesticide MSDS (or SDS) contains critical safety information for handling and emergency response.
  1. What is the safest way to dispose of unused pesticides? Use according to label or follow local hazardous waste disposal guidelines Improper disposal can harm the environment and violate laws.
  2. How should pesticide application equipment be cleaned after use? Rinse thoroughly in a designated area away from water sources Proper cleaning prevents contamination of water and surrounding areas.
  3. Which of the following is an example of a systemic pesticide? Imidacloprid Systemic pesticides are absorbed and transported within the plant.
  4. What is the main cause of pesticide poisoning among applicators? Failure to use proper personal protective equipment (PPE) PPE reduces exposure and risk of poisoning.
  5. Which government agency typically handles pesticide certification in Guam? Guam Environmental Protection Agency (Guam EPA) Guam EPA oversees pesticide use and applicator certification on the island.
  1. What is a common symptom of pesticide inhalation exposure? Coughing and difficulty breathing Inhalation can irritate the respiratory system.
  2. How long should pesticides be kept in their original container? Always; never transfer to unmarked containers Original containers provide critical safety and usage information.
  3. What is the purpose of a buffer zone in pesticide application? To protect sensitive areas from pesticide exposure Buffer zones reduce risk of drift to water bodies, residences, or habitats.
  4. What is the best practice if you get pesticide in your eyes? Flush with clean water for at least 15 minutes and seek medical attention Immediate flushing minimizes damage from chemical exposure.
  5. Why is it important to follow the pesticide label exactly? The label is the law and ensures safe, effective use Deviating from label instructions can be illegal and dangerous.
  6. What is the term for pests becoming less sensitive to pesticides over time? Pesticide resistance Resistance develops when pests survive treatments and pass on resistant traits.

Apply pesticides at proper rates and avoid application before heavy rain This minimizes runoff into streams, lakes, or rivers.

  1. Which pesticide formulation has the highest risk of inhalation exposure? Fumigants Fumigants are gases that can be easily inhaled, requiring special precautions.
  2. How should pesticide spills on soil be handled? Contain, remove contaminated soil if possible, and follow label cleanup instructions Prompt action reduces environmental damage.
  3. What does the term “drift” refer to in pesticide application? Movement of pesticide particles or vapors to non-target areas Drift can cause damage to unintended plants, animals, or people.
  4. Which factor affects the volatility of a pesticide? Temperature Higher temperatures increase volatility and risk of vapor drift.
  5. How can pesticide applicators contribute to sustainable pest management? By following label instructions, using IPM, and minimizing pesticide use

Sustainable practices protect health, environment, and reduce resistance.

  1. What does the term "LD50" indicate in pesticide toxicity? The lethal dose to kill 50% of test animals LD50 is a standard measure of acute toxicity; lower values mean higher toxicity.
  2. Why is it important to check the weather forecast before pesticide application? To avoid applying before rain or high winds Rain can wash pesticides away, and wind can cause drift.
  3. Which of the following is an example of cultural pest control? Crop rotation Changing crops disrupts pest life cycles and reduces infestations.
  4. What does "biodegradation" mean in relation to pesticides? The breakdown of pesticides by microorganisms Microbial activity helps reduce pesticide residues in the environment.
  5. How can applicators protect themselves when mixing dry pesticide formulations? Wear a dust mask and gloves Dry powders can be inhaled or cause skin irritation.
  1. How can pesticide applicators minimize contamination of pollinators? Avoid spraying during bloom and early morning/late evening Pollinators are most active during these times and are vulnerable.
  2. Why is it important to never eat, drink, or smoke while handling pesticides? To avoid accidental ingestion of chemicals Eating or smoking can transfer pesticide residues into the mouth.
  3. What is the effect of pesticide “persistence”? How long the pesticide remains active in the environment More persistent pesticides pose longer risks to non-target organisms.
  4. What type of pesticide formulation is an emulsifiable concentrate (EC)? A liquid that forms an emulsion when mixed with water ECs are easy to mix but may be more hazardous due to solvents.
  5. Which step is most important before transporting pesticides? Ensure containers are securely closed and upright Prevents spills and exposure during transport.
  6. What is the first action if a pesticide applicator is accidentally exposed to a pesticide? Follow first aid instructions on the label Labels provide specific emergency response directions.
  1. What type of pesticide controls weeds? Herbicide Herbicides specifically target unwanted plants.
  2. Why is it important to read and understand the pesticide label before use? The label contains legal and safety instructions Improper use can be dangerous and illegal.
  3. What does the term "target pest" mean? The specific pest the pesticide is intended to control Correct targeting ensures effective pest control and less environmental impact.
  4. How should pesticides be mixed to prevent dangerous reactions? Never mix pesticides unless label specifically allows it Some combinations can create hazardous chemical reactions.
  5. What does the term “restricted entry interval” (REI) mean? The time after application during which entry is restricted REI protects workers from exposure to harmful residues.
  6. Which of the following is a common method to prevent pesticide resistance? Use pesticides with different modes of action Rotating modes of action prevents pest adaptation.
  1. How should pesticide labels be stored? In a safe, accessible place for reference Labels provide critical information for safe use.
  2. What is the correct way to handle pesticide spills on concrete? Absorb with an inert material and dispose properly Quick cleanup prevents spread and contamination.
  3. What type of pesticide formulation reduces inhalation risk? Granules or wettable powders These are less likely to become airborne than liquids or fumigants.
  4. What is the role of the Guam Department of Agriculture in pesticide regulation? To enforce pesticide laws and certify applicators They ensure compliance with safety and usage standards.
  5. Why should applicators avoid applying pesticides during windy conditions? To prevent drift to non-target areas Wind can carry pesticides away, causing damage and contamination.
  6. How should pesticide mixtures be stored if not used immediately? Use as soon as possible; avoid long storage of mixtures Mixtures may lose efficacy or become hazardous over time.
  1. What is the most important factor in selecting a pesticide? Effectiveness against the target pest Choosing the right pesticide ensures pest control and safety.
  2. Which pesticide type is most likely to contaminate groundwater? Herbicides with high water solubility Water-soluble herbicides can leach through soil.
  3. What is the correct way to dispose of a partially full pesticide container? Use product as directed or follow hazardous waste guidelines Improper disposal can harm the environment and violate laws.
  4. What is a common sign of pesticide poisoning in humans? Nausea, headache, dizziness Early symptoms indicate exposure and need for medical help.
  5. How can pesticide applicators minimize risks to children? Store pesticides securely and follow label safety precautions Children are vulnerable to poisoning.
  6. What is the significance of the “signal word” on a pesticide label? Indicates the relative toxicity of the product Helps applicators understand hazards and necessary precautions.
  1. When is the best time to apply pesticides to reduce risk to bees? Early morning or late evening when bees are less active Timing reduces exposure to pollinators.
  2. Which factor affects the toxicity of a pesticide? Dose and exposure route Higher doses and certain routes (e.g., inhalation) increase toxicity.
  3. What is the proper procedure if a pesticide container leaks during transport? Stop, contain spill, notify authorities, and clean up safely Immediate response prevents contamination and injury.
  4. What is the most effective way to reduce pesticide exposure during application? Use the correct PPE and follow label instructions Personal protective equipment and label compliance minimize exposure risks.
  5. Why should pesticide labels never be removed from the container? They provide critical safety and usage information Labels include legal instructions essential for safe pesticide use.
  6. What should you do if you accidentally inhale pesticide fumes? Move to fresh air immediately and seek medical help if symptoms

persist Fresh air reduces exposure, and medical care addresses any harm.

  1. How can pesticide applicators protect themselves when handling fumigants? Use respirators and follow strict safety protocols Fumigants are highly toxic gases requiring specialized protection.
  2. What does the term “drift reduction agent” refer to? A substance added to pesticide mixtures to reduce spray drift These agents increase droplet size or adhesion, minimizing airborne movement.
  3. How often should pesticide applicators attend training or recertification? As required by local regulations, typically every 3 years Ongoing training updates applicators on safety and best practices.
  4. Why is it important to notify neighbors before a pesticide application? To prevent accidental exposure and allow precautions Neighbors can take steps to protect themselves and sensitive areas.
  5. What is the purpose of the “expiration date” on a pesticide label? To indicate when the product may lose effectiveness or become