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WISCONSIN PESTICIDE APPLICATOR EXAM
2025/2026 QUESTIONS AND CORRECT
ANSWERS GRADED A+
The disease that is generally the result of unfavorable growing conditions, such as temperature
or moisture extremes, soil compaction, pesticide or fertilizer excess, etc..?
Noninfectious Disease
The first step in planning a successful weed control program is
Identify the weed (scouting)
Broadleaf weeds differ from grasses how
They have netted veins that are usually less elongated than that of grass leaves.
This weed germinates in the spring, develops a root system and a low-growing cluster of
leaves called a rosette?
Biennial
The part of the pesticide that kills is the?
Active ingredient
What do Wettable powders require when mixed with water....
agitation
What do Surfactants do?
Decrease the surface tension of water, allowing the water carrier to spread over the
surface.
Can you mix two pesticides together if the label doesn't specify they can be mixed?
Yes, your responsibility to make sure they retain their properties.
How can you tell two pesticides are not compatible?
The mixture may curdle, gel or become sludge like.
What part of the label should you look under to find the minimum PPE you should wear?
Precautionary Statement.
How often should you read the pesticide label?
Every time you purchase the product
The Office of Safety and Health Administration protects the nation's workers through
dissemination of information....
"Worker Right-to-Know"
Which of the following dermal exposures is the most serious?
When a pesticide mixed with oil crosses the skin barrier and into the bloodstream,
the results can be fatal.
If you spill highly concentrated chemicals on your cloths how should you clean them?
Don't, dispose of them properly.
When filling, rinsing, draining, and cleaning your equipment preferably the area should
have?
A wash pad, wash rack, or concrete apron with a well designed sump to catch
contaminated water.
What is the best way to get rid of excess chemical?
Dilute excess and reapply to area, but do not exceed label rates for area.
What is a major concern of drift?
Off target damage to vegetation and people.
Which of the following is important to consider when purchasing and applying a pesticide?
a) The label is a legal document
b) Before you buy and apply a pesticide read the label
c) A General Use pesticide is not given a classification on the label
****All of the above****
Who do you have to contact if you have a chemical spill?
DNR
Pesticide breakdown is much slower in groundwater, why?
Low oxygen and light conditions.
Which of the following influences a pesticides leaching ability?
Soil texture and organic matter.
A highly soluble pesticide is....?
Poorly adsorbed and more likely to leach.
What type of nozzle sprays in a cone pattern with droplets throughout?
Solid-cone.
What do you do when raising the boom sprayer you?
Reduce or eliminate the overlap and increase drift.
What are some factors that you should think about before spraying?
Wind, temperature, droplet size...
When using a tree injection system you should?
Use low pressure and allow the tree to uptake chemical.
For treatment to be effective against perennial weeds?
Must use a translocated herbicide to control vegetative reproductive structure
What should you do if you spill chemical on your clothes?
Remove clothes, wash area thoroughly with soapy water, etc.
When should The PPE that you wear when applying pesticides should be laundered?
Wash as soon as possible, do not let clothes sit around.
Which substance produces gas, vapors, fumes and requires special licensing to handle?
Fumigants
Who enforces the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA)?
Who enforces the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA)?
Who is responsible for enforcing the laws that regulate the use of pesticides for structural
pest control?
Wisconsin Department of Public Health.
An individual who applies pesticides for any purpose on property other than that owned,
rented or leased by themselves or their employer is a ...?
Commercial For Hire Pesticide Applicator.
To purchase a "restricted" use pesticide?
Must have a current valid pesticide license or certification # must be recorded on
the retail invoice.
Lawn Care Products Application and Notice Act require?
Placement of markers immediately after application to lawn is made
Applicators of "restricted" use pesticides must keep records for two years of what?
Product used, amount applied, size of area treated, crop, commodity and
location, date and name of applicator.
What are the types of control methods?
Cultural, mechanical, biological, chemical
What is the breakeven point at which the cost of pest control equals the revenue loss caused
by a pest?
Economic injury level
What order do you put these in a tank to mix them properly Soluble powders (SP), Wettable
powders (WP) and Flowable (F)?
Fill tank 1/4 to 1/2 full with carrier.
Begin agitation.
Add utility agents if needed (buffers)
Add Dry pesticides: Wettable Powder (WP )
Add Wet pesticides: Flowable (F)
Add Solution forming pesticides: Soluble (SP)
Add Spray modifiers
Finish filling tank with carrier
(ie. from hardest to dissolve to easiest)
What happens with Wetable Powders (WP)
They wear out pumps and nozzles
What are necessary for the development of an infectious plant disease
Susceptible host, Plant Pathogen, Favorable Environment and Time
What type of weed germinates in the spring, develops a root system and low growing cluster
of leaves called a rosette?
A Biennial weed
Which of the following is not a type of pesticide?
a) wettable powder
b) microencapsulated
c) surfactant
d) soluble powder
Pesticide failure can be caused by which of the following?
a) pest resistance
b) inappropriate rate of pesticide used
c) environmental factors unfavorable for pesticide activity
d)all of the above
What does LD 50 stand for?
Dose that kills half of the test animals (stands for lethal dose (LD) for 50%)
How do you determine if the pesticide you are using is prone to volatilization?
Check the label, it often indicates.
What are two ways for pesticides to move downwind to non-target areas?
By vapor drift and particle drift
How many years must records of restricted pesticide applications be maintained?
2 years
What are examples of plant diseases?
Fungi,Oomycetes,Bacteria,Viroids,
Oomycetes can be describe as
Water Molds
AD
prerequisites for a plant disease
population, Host, ideal environment, time,
Largest Group of plant diseases
Fungi
A Chemical Formulation capable of causing injury to plants
Phytotoxic
Reasons to consider treating an infected area with pesticides
When other prsctices don't work,high value,quality reduced,sudden breakout
What is abiotic
Non-living (example wind damage)
What is biotic?
living (Example Fungi)
Insects have 3 pairs of legs, wings and antennae 3 regions of the body head, thorax and abdomen. While arachnids have 4 pairs of legs, not wing and no antennae 2 regions head and thorax.
What is the difference between simple metamorphosis and complete metamorphosis
Simple Metamoph. is 3 stages egg, nymph, and adult. gradual change. Complex Metamorph. 4 distinct stages egg, larva, pupa, and adult
How dose Temp. and Humidity effect insect development.
Higher temp and humidity is typically better for insects. Temp above threshold will increase reproduction and humidity will decrease stress.
Corn ear worm properties
can vary in color grow 1 inch 1/2 long
Advantages of using insecticides
effective against thousands of insects, they act quickly, effectiveness can be evaluated quickly, equipment and formulations are common
disadvantages of insecticides
the wide range can kill beneficial insects, reapeated use can lead to resistance, added cost of production, potential for drift to areas with benifical insects
Describe ways insecticides are used
Seed Treatment, Soil Application (in Furrow), foliar application to leaves or fruit.
Define weed
Unwanted Plants, we consider all plants except the crop to be a weed.
Two Main Goals of weed management.
Minimize weed competition, and yield loss. Other main goal is to limit a weeds reproductions to reduce weed population in future years.
Describe ways weeds can pose problems in crop production
Compete with crops, Reduce crop quality, interfere with production, produce chemical inhibitors, Irritate or poison, support insects and diseases,
