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Virginia Commercial Pesticide
Applicators CORE Exam Questions
And Answers 2026
what is the difference between selective and non-selective herbicides? - correct-
answer - a selective herbicide controls some plants and not others (ex.
sethoxydim only controls grasses and not broadleaf)
non selective controls all types of plants.
what is the difference between residual and non residual pesticides? - correct-
answer - nonresidual pesticides break down quickly into nontoxic by-products. a
residual pesticide may remain active for weeks, months, or even years
define pesticide resistance - correct-answer - the ability of a pest population that
is repeatedly exposed to a given pesticide to resist and survive its effects. an
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insect population, for example, often has "abnormal" members that can tolerate
exposure to insecticide doses that kill "normal" members. Each time the same
MOA is used, the susceptible members die, and the resistant members survive
and breed. in time most of the members will be resistant to the insecticide.
how can you slow down or limit pesticide resistance? - correct-answer - 1. rotate
MOAs
2. use pesticides that target multiple sites in a pest
3. use new or altered pesticides
4. treat alternate generations of pests
5. use non chemical control methods where feasible
explain the difference between the words "label" and "labeling" - correct-answer
- The label is the information printed on tor attached to the pesticide container.
labeling includes the label itself, plus all other info recieved from the
manufacturer about the product
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what is registration of a pesticide - correct-answer - the ongoing review of a
registered pesticide to assess the risks and benefits associated with its labeled
uses. the goal of registration is to identify and reduce risks, based on current
scientific knowledge
what is a tolerance - correct-answer - the max amount of pesticide residue that
may remain on food or reed at harvest or slaughter. tolerance levels are set by
EPA. observing tolerances is crucial in ensuring food safety.
when and why may a pesticide product be registered for a special local need SLN?
- correct-answer - if a manufacturer wants to register a pesticide for use only on a
regional crop or to manage a localized pest problem. SLN registrations allow
states to expand or limit the uses of federally registered pesticides within their
jurisdictions.
Virginia Commercial Pesticide
Applicators CORE Exam Questions
And Answers 2026
what is the difference between selective and non-selective herbicides? - correct-
answer - a selective herbicide controls some plants and not others (ex.
sethoxydim only controls grasses and not broadleaf)
non selective controls all types of plants.
what is the difference between residual and non residual pesticides? - correct-
answer - nonresidual pesticides break down quickly into nontoxic by-products. a
residual pesticide may remain active for weeks, months, or even years
define pesticide resistance - correct-answer - the ability of a pest population that
is repeatedly exposed to a given pesticide to resist and survive its effects. an
,2|Page
insect population, for example, often has "abnormal" members that can tolerate
exposure to insecticide doses that kill "normal" members. Each time the same
MOA is used, the susceptible members die, and the resistant members survive
and breed. in time most of the members will be resistant to the insecticide.
how can you slow down or limit pesticide resistance? - correct-answer - 1. rotate
MOAs
2. use pesticides that target multiple sites in a pest
3. use new or altered pesticides
4. treat alternate generations of pests
5. use non chemical control methods where feasible
explain the difference between the words "label" and "labeling" - correct-answer
- The label is the information printed on tor attached to the pesticide container.
labeling includes the label itself, plus all other info recieved from the
manufacturer about the product
, 3|Page
what is registration of a pesticide - correct-answer - the ongoing review of a
registered pesticide to assess the risks and benefits associated with its labeled
uses. the goal of registration is to identify and reduce risks, based on current
scientific knowledge
what is a tolerance - correct-answer - the max amount of pesticide residue that
may remain on food or reed at harvest or slaughter. tolerance levels are set by
EPA. observing tolerances is crucial in ensuring food safety.
when and why may a pesticide product be registered for a special local need SLN?
- correct-answer - if a manufacturer wants to register a pesticide for use only on a
regional crop or to manage a localized pest problem. SLN registrations allow
states to expand or limit the uses of federally registered pesticides within their
jurisdictions.
