1|Page
Illinois Seed Treatment Applicator Certification
Examination, Illinois Department of Agriculture
Bureau of Environmental Programs||Verified Exam!!||,
2026/2027-Question Practice Exam with Q&A and
Rationales||Newest Exam!!!
What is a unique characteristic of all biological control
tactics used to control pest populations? - Answer-They
utilize living organisms to control pests
In general, what life stage of a plant/weed is easiest to
control? - Answer-Seedling Stage
What type of disease cannot be transmitted from one plant
to another? - Answer-Leaf scorch caused by a drought
What is an important structural characteristic of most
broadleaf weeds? - Answer-Broadleaf weeds have netted
veins that are less elongated than grass leaves
Which of the following is not included within the four
factors necessary for the development of an infectious
disease? - Answer-Insect vector
,2|Page
What are the life stages of an insect pest that has a
complete development? - Answer-Egg, larva, pupa, adult
What is the first step in planning a successful weed control
program? - Answer-Correctly identify all weeds to be
controlled
What type of pesticide should be used to treat a plant
infected with a viral disease? - Answer-There are no
pesticides for the control of viruses
What is a characteristic of a suspension? - Answer-
Pesticide particles are evenly distributed in the mixture
with agitation but never dissolve
Why does the pesticide manufacturer add inert ingredients
to a pesticide formulation? - Answer-They may improve
coverage of the target pest to make the product safer to
the applicator and the environment
How many pounds of active ingredient are in 5-gallon
container of WEEDBEOUT 2EC? - Answer-10 lbs
,3|Page
What type of chemical will modify a pesticides physical
properties or enhance its performance but has little or not
pesticidal effects? - Answer-Adjuvant
Why would an applicator include a buffering agent in a
spray tank mixture? - Answer-To reduce the pesticide
inactivation due to the pH of the carrier
Which factor should be considered when a pesticide fails
to provide effective control of a pest? - Answer-All of the
above
Which of the following terms describes the type of control
provided by dense, vigorous stand of turf grass that has
been properly fertilized and mowed as a defense against
invading weeds? - Answer-Cultural Control
Which of the following examples are beneficial predators
or parasites feeding on insect pests? - Answer-Lacewings
and Lady beetles and Parasite wasps
, 4|Page
What is a goal of integrated pest management? - Answer-
To avoid adverse effects on humans, wildlife and the
environment
If the label of 2 pesticides do not specifically prohibit or
provide guidance of mixing 2 pesticides together, would
you be violation of any laws if you mixed them together
and applied them to a crop? - Answer-No, however it is the
applicators responsibility to make sure that pesticides
retain their properties when mixed together
What is unique about granular formulations of pesticides?
- Answer-Equipment used to apply granular formulations
require frequent calibration
What is a concern about the use of poisonous bait
formulation pesticides mixed with water, food or other
substances? - Answer-They can be attractive and need to
be placed where not accessible to humans or non-target
animals
What precautions should one take to ensure a uniform
pesticide spray mixture at all times during application and
Illinois Seed Treatment Applicator Certification
Examination, Illinois Department of Agriculture
Bureau of Environmental Programs||Verified Exam!!||,
2026/2027-Question Practice Exam with Q&A and
Rationales||Newest Exam!!!
What is a unique characteristic of all biological control
tactics used to control pest populations? - Answer-They
utilize living organisms to control pests
In general, what life stage of a plant/weed is easiest to
control? - Answer-Seedling Stage
What type of disease cannot be transmitted from one plant
to another? - Answer-Leaf scorch caused by a drought
What is an important structural characteristic of most
broadleaf weeds? - Answer-Broadleaf weeds have netted
veins that are less elongated than grass leaves
Which of the following is not included within the four
factors necessary for the development of an infectious
disease? - Answer-Insect vector
,2|Page
What are the life stages of an insect pest that has a
complete development? - Answer-Egg, larva, pupa, adult
What is the first step in planning a successful weed control
program? - Answer-Correctly identify all weeds to be
controlled
What type of pesticide should be used to treat a plant
infected with a viral disease? - Answer-There are no
pesticides for the control of viruses
What is a characteristic of a suspension? - Answer-
Pesticide particles are evenly distributed in the mixture
with agitation but never dissolve
Why does the pesticide manufacturer add inert ingredients
to a pesticide formulation? - Answer-They may improve
coverage of the target pest to make the product safer to
the applicator and the environment
How many pounds of active ingredient are in 5-gallon
container of WEEDBEOUT 2EC? - Answer-10 lbs
,3|Page
What type of chemical will modify a pesticides physical
properties or enhance its performance but has little or not
pesticidal effects? - Answer-Adjuvant
Why would an applicator include a buffering agent in a
spray tank mixture? - Answer-To reduce the pesticide
inactivation due to the pH of the carrier
Which factor should be considered when a pesticide fails
to provide effective control of a pest? - Answer-All of the
above
Which of the following terms describes the type of control
provided by dense, vigorous stand of turf grass that has
been properly fertilized and mowed as a defense against
invading weeds? - Answer-Cultural Control
Which of the following examples are beneficial predators
or parasites feeding on insect pests? - Answer-Lacewings
and Lady beetles and Parasite wasps
, 4|Page
What is a goal of integrated pest management? - Answer-
To avoid adverse effects on humans, wildlife and the
environment
If the label of 2 pesticides do not specifically prohibit or
provide guidance of mixing 2 pesticides together, would
you be violation of any laws if you mixed them together
and applied them to a crop? - Answer-No, however it is the
applicators responsibility to make sure that pesticides
retain their properties when mixed together
What is unique about granular formulations of pesticides?
- Answer-Equipment used to apply granular formulations
require frequent calibration
What is a concern about the use of poisonous bait
formulation pesticides mixed with water, food or other
substances? - Answer-They can be attractive and need to
be placed where not accessible to humans or non-target
animals
What precautions should one take to ensure a uniform
pesticide spray mixture at all times during application and
