Wisconsin Pesticide Applicator Test –
Commercial Category 6.0 | Actual Exam
Questions with Accurate Detailed Answers |
Updated 2025–2026 | Graded A+
What are the two main goals of weed management? - CORRECT-
ANSWER-The primary goal is to minimize weed competition and the
other main goal is to limit the weed's reproduction in order to manage
the weed population in years to come.
Distinguish grasses from broadleaf plants and herbaceous from woody
plants - CORRECT-ANSWER-Grasses are considered monocots, meaning
they have a single seed leaf, they also have narrow leaves with parallel
veins and a fibrous root system. Broadleaf plants have two seed leaves
and are therefore called dicots, they have broad leaves with veins that
form a net patterns. Broadleaf plants can be further classified into
herbaceous and woody, where the woody plants have a thick layer of
dense tissue called bark, which herbaceous plants lack.
,Describe the life cycles and propagation of annual, biennial, and
perennial plants - CORRECT-ANSWER-Annual plants live for less than a
year, they produce many seeds in one growing season, and then die.
Summer annuals winter as seeds, and winter annuals winter as a low-
growing plant, both summer and winter annuals are easiest to control
when they are small. Biennial plants live for two growing seasons, they
germinate from seed in the spring or summer and winter as a rosette of
leaves. They flower in their second year, produce seeds and then die.
Both annuals and biennials reproduce only by seed. Perennial plants
live for at least 2 years and sometimes longer, they may reproduce by
seed or vegetatively through several different mechanisms.
What is needed to kill annual, biennial, and perennial weeds and when
is it easiest to do so? - CORRECT-ANSWER-To kill annuals or biennials,
you must kill the whole shoot. Controlling these weeds with tillage or
herbicides will kill them plus stop seed production, which will reduce
future weed problems. The most effective way to kill perennials is to
destroy the underground vegetative structures by either repeatedly
tilling the soil or by using a herbicide that translocates to destroy all of
the plant parts.
,How should you time herbicide application with respect to a plant's life
cycle and which timing is most effective? - CORRECT-ANSWER-All
weeds may start as seedlings and it is most effective to treat the plants
at this stage because less energy is required to kill the plants at this
stage than at any other. Biennials and Annuals are controlled by a fall or
early spring treatment, and perennials are controlled best with a fall
treatment as well.
How and when should you apply soil herbicides? - CORRECT-ANSWER-
Soil treatments are commonly used when a site requires residual non-
selective control, such as electric transformer stations, rail ballasts and
signpost bases. They can be applied any time that the soil is not frozen,
and some soil applied herbicides need to be transported by rain to be
absorbed by the plant.
When are foliar sprays appropriate and not appropriate? - CORRECT-
ANSWER-Foliar sprays are not recommended for large brush because
of the potential for drift. Foliar sprays should be operated from the
ground close to the plant and can either be applied through broadcast
or spot application.
, What are the factors in timing a foliar spray? - CORRECT-ANSWER-
Foliar treatments can be made from the time the leaves are fully
expanded until they begin to turn color in the fall, but are most
effective when applied to fully developed foliage of an actively growing
plant. They should be applied at a temperature between 60 and 80
degrees F, and should have adequate time to soak into to plant, thus
applying right before it rains is ineffective.
How are adjuvants used most effectively? - CORRECT-ANSWER-
Adjuvants may be necessary to use for better absorption by foliage that
is extremely waxy or hairy.
What are the effects of soil texture and organic matter content on
application of soil herbicides? - CORRECT-ANSWER-Soil organic matter
and clay particles can adsorb soil-applied herbicides, meaning more
herbicide will be required in these types of soils because the herbicide
will be bound to the soil particles and will not be available to be
absorbed by the weeds.
How do you keep soil herbicides from moving off target? - CORRECT-
ANSWER-Do not apply herbicides to areas where they may leach into
Commercial Category 6.0 | Actual Exam
Questions with Accurate Detailed Answers |
Updated 2025–2026 | Graded A+
What are the two main goals of weed management? - CORRECT-
ANSWER-The primary goal is to minimize weed competition and the
other main goal is to limit the weed's reproduction in order to manage
the weed population in years to come.
Distinguish grasses from broadleaf plants and herbaceous from woody
plants - CORRECT-ANSWER-Grasses are considered monocots, meaning
they have a single seed leaf, they also have narrow leaves with parallel
veins and a fibrous root system. Broadleaf plants have two seed leaves
and are therefore called dicots, they have broad leaves with veins that
form a net patterns. Broadleaf plants can be further classified into
herbaceous and woody, where the woody plants have a thick layer of
dense tissue called bark, which herbaceous plants lack.
,Describe the life cycles and propagation of annual, biennial, and
perennial plants - CORRECT-ANSWER-Annual plants live for less than a
year, they produce many seeds in one growing season, and then die.
Summer annuals winter as seeds, and winter annuals winter as a low-
growing plant, both summer and winter annuals are easiest to control
when they are small. Biennial plants live for two growing seasons, they
germinate from seed in the spring or summer and winter as a rosette of
leaves. They flower in their second year, produce seeds and then die.
Both annuals and biennials reproduce only by seed. Perennial plants
live for at least 2 years and sometimes longer, they may reproduce by
seed or vegetatively through several different mechanisms.
What is needed to kill annual, biennial, and perennial weeds and when
is it easiest to do so? - CORRECT-ANSWER-To kill annuals or biennials,
you must kill the whole shoot. Controlling these weeds with tillage or
herbicides will kill them plus stop seed production, which will reduce
future weed problems. The most effective way to kill perennials is to
destroy the underground vegetative structures by either repeatedly
tilling the soil or by using a herbicide that translocates to destroy all of
the plant parts.
,How should you time herbicide application with respect to a plant's life
cycle and which timing is most effective? - CORRECT-ANSWER-All
weeds may start as seedlings and it is most effective to treat the plants
at this stage because less energy is required to kill the plants at this
stage than at any other. Biennials and Annuals are controlled by a fall or
early spring treatment, and perennials are controlled best with a fall
treatment as well.
How and when should you apply soil herbicides? - CORRECT-ANSWER-
Soil treatments are commonly used when a site requires residual non-
selective control, such as electric transformer stations, rail ballasts and
signpost bases. They can be applied any time that the soil is not frozen,
and some soil applied herbicides need to be transported by rain to be
absorbed by the plant.
When are foliar sprays appropriate and not appropriate? - CORRECT-
ANSWER-Foliar sprays are not recommended for large brush because
of the potential for drift. Foliar sprays should be operated from the
ground close to the plant and can either be applied through broadcast
or spot application.
, What are the factors in timing a foliar spray? - CORRECT-ANSWER-
Foliar treatments can be made from the time the leaves are fully
expanded until they begin to turn color in the fall, but are most
effective when applied to fully developed foliage of an actively growing
plant. They should be applied at a temperature between 60 and 80
degrees F, and should have adequate time to soak into to plant, thus
applying right before it rains is ineffective.
How are adjuvants used most effectively? - CORRECT-ANSWER-
Adjuvants may be necessary to use for better absorption by foliage that
is extremely waxy or hairy.
What are the effects of soil texture and organic matter content on
application of soil herbicides? - CORRECT-ANSWER-Soil organic matter
and clay particles can adsorb soil-applied herbicides, meaning more
herbicide will be required in these types of soils because the herbicide
will be bound to the soil particles and will not be available to be
absorbed by the weeds.
How do you keep soil herbicides from moving off target? - CORRECT-
ANSWER-Do not apply herbicides to areas where they may leach into
