2026 Illinois Pesticide Test Questions
and Correct Answers
Which factor should be considered when a pesticide fails to provide effective control of a pest?
- <CORRECT 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? -
<CORRECT ANSWER >>Cultural Control
Which of the following examples are beneficial predators or parasites feeding on insect pests? -
<CORRECT ANSWER >>Lacewings and Lady beetles and Parasite wasps
What is a goal of integrated pest management? - <CORRECT ANSWER >>To avoid adverse
effects on humans, wildlife and the environment
What is a unique characteristic of all biological control tactics used to control pest populations?
- <CORRECT ANSWER >>They utilize living organisms to control pests
In general, what life stage of a plant/weed is easiest to control? - <CORRECT ANSWER
>>Seedling Stage
What type of disease cannot be transmitted from one plant to another? - <CORRECT ANSWER
>>Leaf scorch caused by a drought
What is an important structural characteristic of most broadleaf weeds? - <CORRECT 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? - <CORRECT ANSWER >>Insect vector
, What are the life stages of an insect pest that has a complete development? - <CORRECT
ANSWER >>Egg, larva, pupa, adult
What is the first step in planning a successful weed control program? - <CORRECT ANSWER
>>Correctly identify all weeds to be controlled
What type of pesticide should be used to treat a plant infected with a viral disease? - <CORRECT
ANSWER >>There are no pesticides for the control of viruses
What is a characteristic of a suspension? - <CORRECT 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? -
<CORRECT 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? -
<CORRECT ANSWER >>10 lbs
What type of chemical will modify a pesticides physical properties or enhance its performance
but has little or not pesticidal effects? - <CORRECT ANSWER >>Adjuvant
Why would an applicator include a buffering agent in a spray tank mixture? - <CORRECT
ANSWER >>To reduce the pesticide inactivation due to the pH of the carrier
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? - <CORRECT ANSWER >>No, however it is the applicators responsibility to make sure that
pesticides retain their properties when mixed together
and Correct Answers
Which factor should be considered when a pesticide fails to provide effective control of a pest?
- <CORRECT 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? -
<CORRECT ANSWER >>Cultural Control
Which of the following examples are beneficial predators or parasites feeding on insect pests? -
<CORRECT ANSWER >>Lacewings and Lady beetles and Parasite wasps
What is a goal of integrated pest management? - <CORRECT ANSWER >>To avoid adverse
effects on humans, wildlife and the environment
What is a unique characteristic of all biological control tactics used to control pest populations?
- <CORRECT ANSWER >>They utilize living organisms to control pests
In general, what life stage of a plant/weed is easiest to control? - <CORRECT ANSWER
>>Seedling Stage
What type of disease cannot be transmitted from one plant to another? - <CORRECT ANSWER
>>Leaf scorch caused by a drought
What is an important structural characteristic of most broadleaf weeds? - <CORRECT 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? - <CORRECT ANSWER >>Insect vector
, What are the life stages of an insect pest that has a complete development? - <CORRECT
ANSWER >>Egg, larva, pupa, adult
What is the first step in planning a successful weed control program? - <CORRECT ANSWER
>>Correctly identify all weeds to be controlled
What type of pesticide should be used to treat a plant infected with a viral disease? - <CORRECT
ANSWER >>There are no pesticides for the control of viruses
What is a characteristic of a suspension? - <CORRECT 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? -
<CORRECT 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? -
<CORRECT ANSWER >>10 lbs
What type of chemical will modify a pesticides physical properties or enhance its performance
but has little or not pesticidal effects? - <CORRECT ANSWER >>Adjuvant
Why would an applicator include a buffering agent in a spray tank mixture? - <CORRECT
ANSWER >>To reduce the pesticide inactivation due to the pH of the carrier
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? - <CORRECT ANSWER >>No, however it is the applicators responsibility to make sure that
pesticides retain their properties when mixed together
