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VT Pesticide Applicator study materials
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VT Pesticide Applicator practice questions

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Question 1Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Which state agency is the lead agency responsible for regulating pesticide sale and use in Vermont?

  1. Vermont Agency of Natural Resources, Water Quality Division
  2. Vermont Agency of Agriculture, Food and Markets Correct answer.
  3. Vermont Department of Public Safety, Division of Fire Safety
  4. Vermont Department of Health, Division of Environmental Health

Explanation

Vermont's pesticide statute is administered by the Vermont Agency of Agriculture, Food and Markets, which registers products, certifies applicators, and enforces label compliance. The Department of Health and the Agency of Natural Resources have related roles in drinking water and water quality, but they are not the lead pesticide regulator.

Question 2Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Under FIFRA, which entity is responsible for registering pesticide products before they may be sold in the United States?

  1. The state agriculture department in each state
  2. The U.S. Environmental Protection Agency Correct answer.
  3. The Occupational Safety and Health Administration
  4. The U.S. Department of Agriculture

Explanation

FIFRA gives EPA the authority to register pesticides and to classify them as general use or restricted use. States may add local uses under Section 24(c), but they cannot place a new product on the market without a federal registration.

Question 3Core - Pesticide Laws, Regulations, Safety and Environmental Protection

What distinguishes a restricted-use pesticide from a general-use pesticide?

  1. It is available for purchase only from licensed pesticide dealers
  2. Use is limited to certified applicators and those they supervise Correct answer.
  3. It may be sold only in containers larger than one gallon in size
  4. It may be applied only by employees of the company that made it

Explanation

EPA classifies a pesticide as restricted use when it may cause unreasonable adverse effects on people or the environment even when used as directed. Such products may be applied only by certified applicators or by people working under their direct supervision.

Question 4Core - Pesticide Laws, Regulations, Safety and Environmental Protection

A Vermont private applicator certification allows the holder to apply restricted-use pesticides:

  1. on land they own or rent for agricultural production Correct answer.
  2. on any property for compensation, if the owner gives permission
  3. only on land that is open to the general public
  4. on land owned by any licensed commercial applicator

Explanation

A private applicator is certified to use restricted-use pesticides on land they own or rent, or on their employer's land, to produce an agricultural commodity. Applying for hire on someone else's property requires a commercial applicator license.

Question 5Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Which signal word on a pesticide label indicates the greatest acute hazard to people?

  1. NOTICE
  2. CAUTION
  3. WARNING
  4. DANGER Correct answer.

Explanation

EPA's signal words rank acute hazard from DANGER (most toxic, sometimes paired with POISON and a skull and crossbones) through WARNING to CAUTION (least toxic of the three). NOTICE is used for other label information and is not a hazard signal word.

Question 6Core - Pesticide Laws, Regulations, Safety and Environmental Protection

What is the correct way to prepare an empty pesticide container for disposal?

  1. Burn it in a barrel on the farm
  2. Triple-rinse it and add the rinse water to the spray tank Correct answer.
  3. Fill it with water and store it until the next season
  4. Crush it and bury it at least one foot deep

Explanation

Rinsing removes most of the remaining residue so the container can be recycled or taken to a disposal site, and adding the rinse water to the tank puts the residue to work instead of releasing it. Burning, burying, or reusing containers for other purposes is unsafe and generally prohibited.

Question 7Core - Pesticide Laws, Regulations, Safety and Environmental Protection

How should pesticides be stored?

  1. In a warm room next to the furnace so they stay easy to pour
  2. In any dry shed as long as the door is kept closed and latched
  3. In their original labeled containers in a locked, ventilated area Correct answer.
  4. In unmarked plastic jugs on a shelf above the livestock feed

Explanation

Pesticides must be kept in their original labeled containers so the directions and safety information stay with the product. A locked, ventilated area away from food, feed, and living space protects children, animals, and emergency responders.

Question 8Core - Pesticide Laws, Regulations, Safety and Environmental Protection

When hauling pesticides in a vehicle, the safest practice is to:

  1. leave them loose in the truck bed so they can shift freely
  2. set them on the passenger seat where you can watch them
  3. stack paper bags under heavy jugs to save space
  4. secure them upright in the cargo area, away from passengers Correct answer.

Explanation

Pesticides should ride in a cargo area, secured and upright so containers cannot tip, roll, or leak, separated from people and food. Loose or passenger-compartment transport invites spills and human exposure.

Question 9Core - Pesticide Laws, Regulations, Safety and Environmental Protection

A label directs 1 pint per acre, and an applicator uses 1.5 pints to control a heavy infestation. Under FIFRA, this is:

  1. a misuse, because applying more than the labeled rate violates the label Correct answer.
  2. allowed, since the pest pressure that season was unusually heavy
  3. acceptable, because the applicator holds a current certification
  4. permitted if the higher rate is written in the application records

Explanation

The label is the legal standard for use, and applying a rate higher than the label allows is a misuse under FIFRA regardless of the applicator's certification or the pest pressure. Writing the higher rate in records documents the violation rather than authorizing it.

Question 10Core - Pesticide Laws, Regulations, Safety and Environmental Protection

The restricted-entry interval (REI) on a pesticide label specifies:

  1. the minimum interval between two applications to the same field
  2. how long the product may be stored before it loses potency
  3. how long entry into the treated area is restricted after application Correct answer.
  4. the waiting period between application and harvest of the crop

Explanation

The REI is a label-mandated period after an application during which people may not enter the treated area, except for limited early-entry tasks with required PPE. It is not a storage life, a retreatment interval, or a preharvest interval.

Question 11Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Under the Worker Protection Standard, decontamination supplies for workers must be located:

  1. at the farm office, no matter where the crews are working
  2. within one mile of the nearest worker on the operation
  3. at the mixing site only, since workers do not handle concentrate
  4. within a quarter mile of each worker's location Correct answer.

Explanation

WPS requires decontamination supplies such as water, soap, towels, and a change of clothing within one-quarter mile of where workers are located. Supplies kept only at the office or the mixing site do not meet the standard.

Question 12Core - Pesticide Laws, Regulations, Safety and Environmental Protection

How often must agricultural workers covered by the Worker Protection Standard be trained?

  1. once, before their first day of work in agriculture, for their whole career
  2. every five years, at the same time as applicator recertification
  3. every month during the growing season
  4. every 12 months, before they work in a treated area Correct answer.

Explanation

Covered workers and handlers must be trained before they work in an area where a restricted-entry interval has applied and retrained at least every 12 months. One-time or career-long training does not satisfy the standard.

Question 13Core - Pesticide Laws, Regulations, Safety and Environmental Protection

When a pesticide's REI is longer than 48 hours, the Worker Protection Standard requires the employer to:

  1. notify the state agriculture department before applying
  2. post warning signs at the farm office only
  3. give both oral warning and posted signs to workers Correct answer.
  4. wait 48 hours before posting any warning signs

Explanation

When the restricted-entry interval exceeds 48 hours, WPS requires both oral notification and posted warning signs so the warning cannot be missed. For shorter REIs the employer may choose one method.

Question 14Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Which glove is the best choice when the label requires chemical-resistant gloves for handling a concentrate?

  1. Cotton canvas gloves
  2. Unlined nitrile gloves Correct answer.
  3. Leather work gloves
  4. Wool-lined winter gloves

Explanation

Chemical-resistant gloves such as unlined nitrile resist penetration by the concentrate and can be rinsed and reused. Leather, cotton, and wool absorb pesticides and hold them against the skin.

Question 15Core - Pesticide Laws, Regulations, Safety and Environmental Protection

A jug of concentrate tips over and spills in the back of a pickup. What should be done first, if it can be done safely?

  1. Hose the spilled material off onto the gravel so it soaks in
  2. Load the spilled material into the truck cab for the trip to the dealer
  3. Cover the spill with soil and drive away to get help
  4. Keep people away, stop the leak, and contain the spill Correct answer.

Explanation

Spill response starts with protecting people and keeping others out, then stopping the source and containing the material with absorbents or dikes if it is safe to do so. Washing the spill into gravel or soil spreads contamination, and carrying it in the cab exposes the driver.

Question 16Core - Pesticide Laws, Regulations, Safety and Environmental Protection

When filling a spray tank from a well or pond, which practice prevents pesticide from siphoning back into the water supply?

  1. Filling the tank as fast as possible to shorten the job
  2. Keeping the fill hose above the water level, or using an air gap Correct answer.
  3. Leaving the hose submerged in the well while mixing
  4. Placing the water intake downstream of the filling site

Explanation

An air gap, or a hose end held above the water line, breaks the connection so tank contents cannot be pulled back into the supply when pressure drops. A submerged hose without a backflow device can contaminate the water source.

Question 17Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Which practice best reduces spray drift when conditions are borderline?

  1. Spraying during a temperature inversion
  2. Adding more surfactant to the tank mix
  3. Increasing pressure and using fine nozzles
  4. Using coarser droplets and lowering the boom height Correct answer.

Explanation

Drift is reduced by producing larger droplets, lowering the boom closer to the target, and applying when wind speeds are within label limits. Fine droplets, high pressure, and inversions all increase off-target movement.

Question 18Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Which combination of site conditions most increases the risk that a soil-applied pesticide will leach into groundwater?

  1. Loam soil, thick crop canopy, and light irrigation
  2. Organic soil, flat ground, and dry weather
  3. Clay soil, steep slope, and a deep water table
  4. Sandy soil, shallow water table, and heavy rainfall Correct answer.

Explanation

Leaching risk rises when the pesticide is mobile, the soil holds little water, the water table is shallow, and rainfall or irrigation is heavy. Clay and organic soils bind pesticides more strongly, and a deep water table gives the chemical further to travel.

Question 19Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Certified applicators must keep records of restricted-use pesticide applications for at least how long under federal rules?

  1. Ten years
  2. One year
  3. Two years Correct answer.
  4. Six months

Explanation

Certified applicators must keep records of restricted-use pesticide applications for two years after the application date. The records must be made available to state and federal inspectors on request.

Question 20Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Working in full PPE on a hot, humid Vermont day can cause heat stress. The best response is to:

  1. skip the chemical-resistant suit and wear a t-shirt instead
  2. take frequent breaks in shade and drink plenty of water Correct answer.
  3. drink less water so you sweat less
  4. remove the respirator for a few minutes whenever you feel warm

Explanation

Protective equipment is required whenever the label calls for it, so heat stress is managed with work/rest cycles, shade, and fluids rather than by dropping PPE or limiting water intake. Removing a respirator or suit defeats the protection the label requires.

Question 21Core - Pesticide Laws, Regulations, Safety and Environmental Protection

A state may allow an additional use of a federally registered pesticide to solve a pest problem unique to that state under which provision?

  1. A Section 3 federal registration
  2. A Section 25(b) minimum-risk exemption
  3. A Section 18 emergency exemption
  4. A Section 24(c) special local need registration Correct answer.

Explanation

Section 24(c) of FIFRA lets a state register an additional use of an already federally registered product to address a pest problem that is unique to that state. It is not an emergency exemption, which covers unforeseen outbreaks.

Question 22Core - Pesticide Laws, Regulations, Safety and Environmental Protection

When an unforeseen pest emergency arises and no registered product will control it, EPA can allow use of an unregistered pesticide by granting:

  1. an emergency exemption under Section 18 Correct answer.
  2. a supplemental distributor registration
  3. a tolerance exemption under Section 25(b)
  4. a special local need registration under Section 24(c)

Explanation

Section 18 of FIFRA allows EPA to grant an emergency exemption for an unregistered use when an unforeseen pest problem threatens and no registered product will work. Section 24(c) addresses special local needs rather than emergencies.

Question 23Core - Pesticide Laws, Regulations, Safety and Environmental Protection

A grower needs to apply a highly toxic insecticide to a crop in full bloom. Which practice best protects honey bees?

  1. Spray at the label rate but only on the upwind half of the field
  2. Apply in late evening or at night, when bees are not foraging Correct answer.
  3. Add a sticker to keep the residue on the petals longer
  4. Apply at mid-morning, when the flowers are open and dry

Explanation

Bees forage in open bloom during daylight, so a toxic insecticide applied then exposes foragers directly and contaminates pollen and nectar. Applying when bees are not flying greatly reduces the hazard, and any label pollinator statements must be followed.

Question 24Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Before applying a pesticide near a habitat known to contain a federally listed species, the applicator should first:

  1. notify the state police and proceed with the application
  2. apply at a lower rate than the label allows to reduce exposure
  3. wait until the species has migrated out of the area
  4. check the label and local bulletins for limits in that area Correct answer.

Explanation

Labels and local bulletins may restrict or prohibit use in areas that provide habitat for listed species, and those restrictions are enforceable parts of the label. Reducing the rate is not a legal substitute for following the label.

Question 25Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Under FIFRA, may a state such as Vermont impose requirements on pesticide use that are stricter than the federal label?

  1. Only for products classified as general use
  2. No; the federal label sets the only allowable requirements nationwide
  3. Only with written approval from the product's manufacturer
  4. Yes; a state may regulate sale and use more strictly than FIFRA Correct answer.

Explanation

FIFRA sets a national floor but preserves a state's authority to regulate the sale and use of pesticides more stringently. A state may add requirements, but it may not authorize a use that is less restrictive than the federal label.

Question 26Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Under FIFRA, what distinguishes a restricted-use pesticide from a general-use pesticide?

  1. It is registered only for application to agricultural crops.
  2. It may be sold only in containers larger than one gallon.
  3. It must carry the signal word CAUTION on its label.
  4. It may pose unreasonable risks without added use restrictions. Correct answer.

Explanation

FIFRA classifies a pesticide as restricted-use when it may cause unreasonable adverse effects on people or the environment even when used as directed, so sale and use are limited to certified applicators. General-use products do not carry that extra restriction.

Question 27Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Which signal word on a pesticide label represents the highest acute toxicity category?

  1. CAUTION
  2. DANGER Correct answer.
  3. WARNING
  4. NOTICE

Explanation

DANGER, often accompanied by POISON and a skull-and-crossbones symbol, marks Category I, the most acutely toxic products. WARNING marks Category II, and CAUTION marks Categories III and IV.

Question 28Core - Pesticide Laws, Regulations, Safety and Environmental Protection

In Vermont, which person needs a private applicator certification?

  1. A municipal employee spraying pesticides along roadside rights-of-way.
  2. A dealer selling restricted-use products to area farmers.
  3. A farmer applying a restricted-use product on rented land. Correct answer.
  4. A landscaper who sprays restricted-use products on customer lawns.

Explanation

Private applicator certification covers people who apply restricted-use pesticides to land they own or rent for producing agricultural commodities. Commercial landscapers and municipal applicators fall under commercial certification, and dealers are not applicators.

Question 29Core - Pesticide Laws, Regulations, Safety and Environmental Protection

What is the purpose of the Statement of Practical Treatment on a pesticide label?

  1. It states the maximum number of applications allowed per season.
  2. It lists the EPA registration number and establishment number.
  3. It gives first aid directions to follow after an exposure. Correct answer.
  4. It identifies the signal word and the human hazard.

Explanation

The Statement of Practical Treatment provides first aid instructions for accidental exposure, such as what to do if the product gets in the eyes or on the skin. It is separate from the hazard signal word.

Question 30Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Under the Worker Protection Standard, an employee who mixes and loads pesticides is classified as a:

  1. restricted-entry monitor
  2. supervisor
  3. handler Correct answer.
  4. worker

Explanation

The WPS defines a handler as anyone who mixes, loads, transfers, or applies pesticides, or who cleans equipment used for those tasks. Workers perform tasks in treated areas but do not handle pesticides.

Question 31Core - Pesticide Laws, Regulations, Safety and Environmental Protection

A pesticide application drifts onto a neighbor's vegetable garden and damages the plants. Who bears legal responsibility for the damage?

  1. The pesticide manufacturer, because the label did not prohibit wind.
  2. The certified applicator who made the application. Correct answer.
  3. The neighbor, because the garden was downwind.
  4. The property owner who hired the applicator.

Explanation

The applicator is responsible for keeping the pesticide on the target site, and off-target drift that damages another person's property can be both a misuse and a civil wrong. The neighbor's location and the manufacturer's label do not shift that duty.

Question 32Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Which practice best slows the development of pesticide resistance in an insect population?

  1. Using a single insecticide until it no longer controls the pest.
  2. Applying an insecticide whenever any insect is seen.
  3. Alternating insecticides with different modes of action. Correct answer.
  4. Applying the same insecticide more frequently at a lower rate.

Explanation

Resistance develops when the same mode of action is used repeatedly, which selects for surviving individuals. Rotating among different modes of action reduces that selection pressure and helps preserve susceptibility.

Question 33Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Which practice best reduces the chance that a pesticide applied to a crop field will reach a nearby stream?

  1. Leaving a vegetated buffer strip beside the stream. Correct answer.
  2. Spraying directly up to the stream bank.
  3. Applying the pesticide just before a heavy rain.
  4. Increasing the application rate near the stream.

Explanation

A vegetated buffer strip slows runoff and traps sediment and pesticides before they reach surface water. Applying before rain, spraying to the bank, or raising rates near water all increase the chance of movement into the stream.

Question 34Core - Pesticide Laws, Regulations, Safety and Environmental Protection

When a pesticide label requires a respirator, what must an employer provide before an employee wears it?

  1. A yearly inspection by the local fire department.
  2. A note from the pesticide dealer approving the respirator.
  3. A dust mask as an acceptable substitute.
  4. Fit testing and a medical evaluation. Correct answer.

Explanation

Respirator use requires fit testing and a medical evaluation before the employee wears the respirator. A dust mask is not an acceptable substitute for the respirator specified on the label.

Question 35Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Under FIFRA, EPA must review each registered pesticide's registration at least every how many years?

  1. 10 years
  2. 15 years Correct answer.
  3. 5 years
  4. 25 years

Explanation

The 2007 FIFRA amendments established registration review, requiring EPA to review each registered pesticide at least every 15 years. The review considers whether the pesticide still meets the registration standard.

Question 36Core - Pesticide Laws, Regulations, Safety and Environmental Protection

A pesticide dealer sells a restricted-use pesticide to a person who is not certified. Under FIFRA, this sale is:

  1. unlawful, because only certified applicators may purchase it. Correct answer.
  2. permitted, if the buyer signs a label-compliance statement.
  3. unlawful only if the buyer later applies it to a crop.
  4. permitted, if the dealer records the buyer's name and address.

Explanation

FIFRA limits sale and distribution of restricted-use pesticides to certified applicators, so selling to an uncertified buyer violates the law. A signed promise or a record of the buyer does not cure the lack of certification.

Question 37Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Which statement describes a general-use pesticide?

  1. It may be sold only to licensed pesticide dealers.
  2. It may be applied only by a certified commercial applicator.
  3. It may be used only on agricultural crops.
  4. It may be bought and used without applicator certification. Correct answer.

Explanation

General-use pesticides are available to the public and do not require applicator certification. Restricted-use pesticides are the category that requires certification.

Question 38Core - Pesticide Laws, Regulations, Safety and Environmental Protection

A pesticide label lists corn as a use site but does not mention cutworms. A grower wants to apply it to corn to control cutworms. Under FIFRA, this use is:

  1. prohibited, because the target pest is not named anywhere on the label.
  2. allowed, because the labeled site is corn and the pest is not excluded. Correct answer.
  3. allowed only after EPA grants a Section 18 emergency exemption.
  4. prohibited unless the state issues a special local-need label.

Explanation

FIFRA's definition of use inconsistent with labeling does not include applying a product against a pest not named on the label when the site is on the label and the label does not prohibit that use. No Section 18 or special local-need label is needed for this situation.

Question 39Core - Pesticide Laws, Regulations, Safety and Environmental Protection

Two pesticide labels give different reentry restrictions for the same crop. When the products are tank-mixed, which restriction applies?

  1. Neither restriction, because the mixture is not registered.
  2. The less restrictive of the two restrictions.
  3. The more restrictive of the two restrictions. Correct answer.
  4. The restriction on the product with the larger container.

Explanation

When labels differ for a tank mixture, the applicator must follow the more restrictive directions to comply with both labels. The mixture itself does not require a separate registration.

Question 40Core - Pesticide Laws, Regulations, Safety and Environmental Protection

What is an acceptable way to handle rinsate from a pesticide container that has been triple rinsed?

  1. Store it in an unlabeled bucket for later use around the farm.
  2. Dump it on a gravel driveway.
  3. Pour it down a household drain.
  4. Apply it to a labeled site through the spray tank. Correct answer.

Explanation

Rinsate from a properly rinsed container can be added to the spray tank and applied to a site listed on the label at the labeled rate. Otherwise it must be managed according to the label and Vermont rules, never dumped or left in unlabeled containers.

Question 41Agricultural Plant and Animal Pest Control

In an integrated pest management program for an agricultural crop, what is the economic threshold?

  1. The pest density at which yield loss first becomes measurable
  2. The largest pest population an area can support indefinitely
  3. The pest level at which control is applied to prevent economic loss Correct answer.
  4. The pesticide rate that produces the greatest net return per acre

Explanation

The economic threshold, also called the action threshold, is the pest density at which control should begin so the population does not reach the economic injury level. It is calculated from control cost, crop value, and expected damage per pest, so treating below the threshold generally costs more than the loss it prevents. Thresholds are crop-, pest-, and growth-stage specific and should be checked against current extension guidance.

Question 42Agricultural Plant and Animal Pest Control

On a crop protection label, the preharvest interval (PHI) is best defined as:

  1. the waiting period before a field may be replanted
  2. the time a product can be stored after opening
  3. the minimum number of days between the last application and harvest Correct answer.
  4. the number of days the spray stays active on the foliage

Explanation

The preharvest interval is the label-specified minimum time between the final application and harvest of the crop. It exists to keep residues below the tolerance set for that crop and is a legal requirement, not a guideline. Some labels also set separate intervals for grazing or cutting forage.

Question 43Agricultural Plant and Animal Pest Control

Under federal and Vermont law, a restricted-use pesticide may be purchased and used only:

  1. by certified applicators or people working under their supervision Correct answer.
  2. by licensed physicians acting as agents
  3. in non-agricultural settings such as golf courses
  4. by state inspectors during routine audits

Explanation

Restricted-use pesticides carry greater risk of acute toxicity or environmental harm, so they are limited to certified applicators or to noncertified people working under a certified applicator's supervision as the label allows. Records of restricted-use applications must be kept, and certification must be current for the category of use.

Question 44Agricultural Plant and Animal Pest Control

What is the main function of a surfactant in a spray mixture?

  1. It supplies nutrients to the crop along with the herbicide spray
  2. It neutralizes pesticide residues on the leaf surface
  3. It lowers surface tension so spray spreads on the leaf Correct answer.
  4. It raises the pH of the spray solution

Explanation

Surfactants reduce the surface tension of water so droplets spread and wet waxy, hairy, or dusty leaf surfaces instead of beading and rolling off. Better coverage and retention usually mean better uptake of the active ingredient. Many formulated products already contain surfactant, and adding more than the label allows can cause runoff or crop injury.

Question 45Agricultural Plant and Animal Pest Control

The label for a pasture herbicide states a grazing restriction. How should the applicator comply?

  1. Keep livestock off the treated area for the number of days stated Correct answer.
  2. Mow the pasture immediately after allowing animals to graze
  3. Double the application rate if animals will return within a week
  4. Treat only when animals are grazing so they trample the weeds

Explanation

Grazing restrictions protect the food supply by preventing animals from consuming treated forage while residues are still high enough to appear in meat or milk. The label states how many days livestock must be excluded and may also restrict cutting hay or feeding treated forage. These intervals must be followed exactly because they are tied to residue tolerances.

Question 46Agricultural Plant and Animal Pest Control

What is the primary purpose of treating crop seed with a fungicide or insecticide before planting?

  1. To control weeds that emerge before the crop does
  2. To protect germinating seed and seedlings from soilborne pests Correct answer.
  3. To supply nitrogen to the crop through the growing season
  4. To increase the genetic yield potential of the variety

Explanation

A seed treatment places a small amount of protectant directly on the seed so that soilborne fungi, insects, or nematodes attacking the germinating seed and young seedling are suppressed. Protection is limited to the seed and seedling stage and does not replace foliar or soil programs later in the season. Label rates, seeding equipment, and planter handling precautions must be followed to avoid injury and exposure.

Question 47Agricultural Plant and Animal Pest Control

What is the main purpose of regularly scouting a field in an IPM program?

  1. To measure the moisture content of stored grain
  2. To identify pest species and count them before deciding on treatment Correct answer.
  3. To identify soil types in each management zone
  4. To check sprayer output before each field is treated

Explanation

Scouting establishes which pests are present, their density and growth stage, and whether natural enemies are active. Those counts are then compared to the treatment threshold, which is the basis for deciding whether an application is justified. Regular scouting also catches problems early, when control is cheapest and most effective.

Question 48Agricultural Plant and Animal Pest Control

Why are systemic herbicides generally preferred over contact herbicides for controlling established perennial weeds?

  1. Systemic products kill only the tissue the spray touches
  2. Systemic herbicides move within the plant to control roots and regrowth Correct answer.
  3. Contact herbicides must reach the soil to be absorbed by roots
  4. Contact herbicides move downward in the phloem to kill roots

Explanation

Systemic herbicides are absorbed and translocated through the phloem to belowground storage organs, so shoots and regrowth are both suppressed. Contact herbicides injure only the tissue they cover, and perennial roots quickly send up new shoots. Systemics work best when weeds are actively growing and not stressed by drought, because translocation follows the plant's carbohydrate flow.

Question 49Agricultural Plant and Animal Pest Control

Aphids feed with piercing-sucking mouthparts on plant sap. Which type of insecticide is best suited to reach them?

  1. Contact sprays applied only to the soil surface
  2. Stomach poisons applied as a bait
  3. Systemic insecticides that are absorbed and moved in the plant Correct answer.
  4. Fumigants applied to the field at planting time for soil insects

Explanation

Aphids insert their mouthparts into plant tissue and feed on sap, so a material absorbed by the plant and moved in the vascular system reaches them even under leaves or in curled foliage. Stomach poisons require the insect to eat treated bait or foliage, which sap feeders do not do. Thorough coverage with contact insecticides also fails where colonies are sheltered.

Question 50Agricultural Plant and Animal Pest Control

When should a preemergence herbicide normally be applied?

  1. After weeds have emerged and grown four inches tall
  2. To the soil before weed seedlings emerge Correct answer.
  3. Only after the crop canopy has closed
  4. At harvest to prevent next season's weeds

Explanation

Preemergence herbicides are applied to the soil surface before the target weeds germinate, where they form a barrier that injures emerging seedlings. They usually need rainfall or irrigation to move into the germination zone, and they do not control weeds that are already established. Application timing relative to planting depends on crop tolerance and the specific label.