Washington Pesticide Laws and Safety Questions and Correct Answers the Latest Upda
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Course
Washington Pesticide Laws
Institution
Washington Pesticide Laws
What is a severe pest?
A pest present in populations that are always above the economic injury level in the
absence of control.
What is an occasional or secondary pest?
A pest that can cause damage above economic injury levels only at certain times.
What is a potential pest?
A pest that t...
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What is an economic threshold?
✓ The level or density of a pest population where control measures need to be applied to
prevent the pest from reaching the economic injury level.
What is an economic injury level?
✓ The pest population density that causes losses equal to the cost of the control measures.
What are mechanical control methods?
✓ Devices that prevent the spread or reduce the infestation of pests, primarily insects and
vertebrate animals. Mechanical controls include hand destruction, traps, and mechanical
exclusions such as screens, nets, and fences.
What are physical control methods?
✓ The manipulation of water, humidity, temperature, electric shock, or other radiant energy
to kill, alter the pests life cycle, or create an unfavorable environment for the pest to live
in.
What are cultural control methods?
✓ The manipulation of the environment to avert serious pest damage. Cultural control
methods require knowledge of the plants needs and potential problems. Ex: irrigation
management, rotating crops, pruning, cover crops, etc.
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✓ The use of plants and animals that are resistant to attack by pests. Ex: Traditional
breeding techniques combined with genetic manipulation of plants to promote host plant
resistance to pests and disease.
What are biological control methods?
✓ Involve the introduction, encouragement, and/or artificial increase of plants and
insects/animals that are parasites or predators of a pest species.
What are chemical control methods?
✓ Involve the use of naturally or synthetically derived chemicals that, kill, attract, repel, or
otherwise manage the growth of a pest.
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