WASHINGTON PESTICIDE LAWS AND SAFETY
STUDY GUIDE 2026 EXAM QUESTIONS AND
CORRECT SOLUTIONS
● Incomplete Metamorphosis - Eggs hatch into immature forms (called
nymphs) that resemble adults and gradually increase in size; many
eventually develop wings and sexual organs. **Termites cockroaches
earwigs**
● Complete Metamorphosis - eggs hatch into larvae (usually the feeding
and destructive stage), which go through pupal stage before becoming
adults. These adults look completely different from the other life stages,
may live in different habitats, and often do not feed. **Ants, beetles,
wasps and flies**
● Conducive Conditions - Conditions that may lead to or enhance an
infestation of WDOs
● Physical Pest Control Method - method of getting rid of insects and
small rodents by removing, attacking, or setting up barriers
● Cultural Pest Control Method - method of managing pets by
manipulating the environment or implementing a preventive practice
,● Chemical Pest Control Method - method to destroy or eliminate pests
that contains chemicals unsafe for human consumption
● Biological Pest Control Method - method of controlling pests by using
other organisms
● Pest - a plant or animal detrimental to man; one that pesters or annoys
● Pathogen - disease causing organism
● Biomagnificiation - the process where some organisms accumulate
chemical resides in higher concentrates than those found in the
organisms they consume
● EPA - Environmental Protection Agency
● OPs - Organophosphate Insecticides
● IPM - Integrated Pest Management
● Integrated Pest Management - the use of all available tactics or
strategies to manage pests
, ● What are the 5 IPM steps - 1. Identify the pest 2. define the
management system 3. develop the pest management strategy
4. develop reliable monitoring techniques 5. Use economic thresholds
● Severe Pests - Always present at populations above the economic
injury threshold in the absence of control
● Occasional or secondary pests - can cause damage above economic
injury levels only at certain times
● potential pests - cause no apparent economic damage under normal
circumstances
● migratory pests - may cause serious damage on a periodic basis
● 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
● Economic Injury Level - the pest population density that cause losses
equal to the cost of control measures
STUDY GUIDE 2026 EXAM QUESTIONS AND
CORRECT SOLUTIONS
● Incomplete Metamorphosis - Eggs hatch into immature forms (called
nymphs) that resemble adults and gradually increase in size; many
eventually develop wings and sexual organs. **Termites cockroaches
earwigs**
● Complete Metamorphosis - eggs hatch into larvae (usually the feeding
and destructive stage), which go through pupal stage before becoming
adults. These adults look completely different from the other life stages,
may live in different habitats, and often do not feed. **Ants, beetles,
wasps and flies**
● Conducive Conditions - Conditions that may lead to or enhance an
infestation of WDOs
● Physical Pest Control Method - method of getting rid of insects and
small rodents by removing, attacking, or setting up barriers
● Cultural Pest Control Method - method of managing pets by
manipulating the environment or implementing a preventive practice
,● Chemical Pest Control Method - method to destroy or eliminate pests
that contains chemicals unsafe for human consumption
● Biological Pest Control Method - method of controlling pests by using
other organisms
● Pest - a plant or animal detrimental to man; one that pesters or annoys
● Pathogen - disease causing organism
● Biomagnificiation - the process where some organisms accumulate
chemical resides in higher concentrates than those found in the
organisms they consume
● EPA - Environmental Protection Agency
● OPs - Organophosphate Insecticides
● IPM - Integrated Pest Management
● Integrated Pest Management - the use of all available tactics or
strategies to manage pests
, ● What are the 5 IPM steps - 1. Identify the pest 2. define the
management system 3. develop the pest management strategy
4. develop reliable monitoring techniques 5. Use economic thresholds
● Severe Pests - Always present at populations above the economic
injury threshold in the absence of control
● Occasional or secondary pests - can cause damage above economic
injury levels only at certain times
● potential pests - cause no apparent economic damage under normal
circumstances
● migratory pests - may cause serious damage on a periodic basis
● 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
● Economic Injury Level - the pest population density that cause losses
equal to the cost of control measures
