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D89 Exam Questions and Answers PDF | Complete Study Guide and Practice Exam Solutions

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Prepare confidently for your exams with this comprehensive D89 Exam Questions and Answers study resource. This updated material includes practice questions, verified answers, and revision content designed to help students strengthen subject understanding and improve academic performance.

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Institution
D89
Course
D89

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Pesticide Certification -Test Exam latest
update 2026; Questions and Answers
for Exam |pass guaranteed |grade A+


A pest can be anything that:
a. Competes with humans, domestic animals or desirable plants for food or water
b. Injures humans, animals, desirable plants, structures, or possessions
c. Spreads disease to humans, domestic animals, wildlife, or desirable plants
d. Annoys human or domestic animals
e. All of the above
E. A pest can be anything that annoys, injures, spreads disease or competes with desired plants,
animals, or humans. Examples of pests include weeds, insects, fungi, bacteria, mites and
nematodes




One requirement for effective pest control is:
a. Identification of the pest to be controlled
b. New spray equipment
c. Using more than the recommended dosage
d. Spraying only the field margin
A. Identifying the pest is the first step. Additionally, it is necessary to know what control
methods are available; evaluate the benefits and risks of each method or combination of
methods; choose the methods that are most effective and will cause the least harm to people

,and the environment; use each method correctly; and observe local, state, and federal
regulations that apply to the situation.




A pest-control method should be used only when that method will cost less than the expected
value of a loss from the pest.

a. True

b. False

A. Even though a pest is present, it may not do very much harm. It could cost more to control
the pest than to allow the damage to occur. The point at which the cost of the damage exceeds
the cost of the control is the "economic threshold."




Successful pest control is based on the ability to:

a. Eradicate all pests

b. Use pesticides whenever pests are identified

c. Contaminate the environment

d. None of the above

D. The best answer should be to: 1) keep pest damage to a minimum by choosing an
appropriate combination of control methods, 2) recognize when direct action is necessary, and
endanger the environment as little as possible




Which of the following is NOT a pest control goal?

a. Prevention - keeping a pest from becoming a problem

,b. Suppression - reducing pest numbers to an acceptable level
c. Eradication - destroying an entire pest population
d. All of the above are possible goals
D. Prevention and suppression are common goals. Eradication is a difficult goal to achieve,
especially in outdoor areas, but may be attempted when a foreign pest has been introduced into
an area (e.g. gypsy moth, Mediterranean fruit fly, etc.). Eradication is a more common goal in
indoor areas.




The strategy of combining pest control tactics into a single plan to reduce pests and their
damage to an acceptable level is called:
a. Holistic Resource Management Plan
b. Biological Control
c. Best Management Practices
d. Integrated Pest Management
D. Biological control is a tactic of Integrated Pest Management (IPM). IPM is one component of a
holistic resource management plan and is an example of a Best Management Practice.




When the level of a pest population reaches the stage where pest control action should be
taken, you are at the:
a. Scouting stage
b. Monitoring stage
c. Threshold stage
d. Pesticide application stage

, C. Thresholds maybe based on aesthetic, health, or economic considerations. Action thresholds
have been determined for many pests.




Which of the following is NOT an example of a control tactic?

a. Pesticide resistance - the ability of a pest to resist pesticide control measures
b. Biological control - using natural predators to control pests
c. Cultural controls - such as crop rotation, date of planting, cultivation, etc.

d. Chemical control - the use of pesticides
A. Do not confuse pest resistance with host resistance. Some plants and animals resist pests
better than others




The ability of a pest to resist or avoid poisoning from a pesticide even when it has been properly
applied is called:
a. Efficacy
b. Pesticide resistance
c. Dormancy
d. Antagonism
B. Each time a pesticide is used, it selectively kills the most susceptible pests. Some pests are
able to withstand its effects. These pests may be able to pass along this trait to their offspring.

Continued use of the same pesticide may allow the resistant offspring to multiply. This
phenomenon is known as pesticide resistance.

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