Virginia Commercial Pesticide Applicators CORE
exam (Newest 2025/2026 Update) 85
Comprehensive Questions & certified Answers |
100% Correct | Grade.
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Terms in this set (86)
Explain the difference between key Key pests are nearly always present and require
pests, occasional pests and regular control. occasional pests are migratory or
secondary pests cyclical and require intermittent control. secondary
pests require control only under certain conditions,
such as the elimination of a key pest or the absence
of a natural host.
what should you do first if you see identify the cause
damage to a plant, animal, or
valuable product/
what should you do first if you make sure the pest is actually responsible for the
discover a pest that may need to be damage. then accurately identify the pest
controlled?
how can pest identification help you it allows you to determine basic information about
develop a good pest control the pest, including its life-cycle and when it is most
strategy? susceptible to control measures.
,name the 5 basic pest groups weeds, parasites and diseases, mollusks,
arthropods, and vertebrates.
why do weeds present such a weeds are often hardy, aggressive, and tolerant of
challenge to pest managers? harsh conditions. many produce large numbers of
seeds which can spread over a wide area and
remain dormant for a long time.
how can you tell a monocot from a monocots (sedges and grasses) have one
dicot? cotyledon, parallel leaf veins, flower parts in
multiples of 3 and fibrous roots. Dicots have 2
cotyledons, broad leaves with netted veination,
and flower parts in multiples of 4 and 5 and usually
have taproots.
name the pathogens that cause most fungi, bacteria, mycoplasma, and viruses
plant and animal diseases
what are the symptoms of viral plant stunting, yellow rings on leaves, wilting, and
diseases mosaic patterns
how do plant parasitic nematodes by attacking the roots, stems and leaves. nematode
harm plants? root feeding interferes with a plants ability to take
up water and nutrients. infected plants wilt and
seem to be suffering from a lack of water or
nutrients.
how do mollusks harm plants? by feeding on foliage and fruit. mollusks reduce
the value of commercial produce if they feed on
harvested plants and fruit.
, what are arthropods? how do they arthropods are animals with segmented bodies and
differ from vertebrates? jointed appendages. Arthropods have an external
skeleton and may have specialized appendages
such as sucking tubes, chewing mouth parts,
antennae, and pincers. they have no backbones
like vertebrates
what is the difference between gradual metamorphosis includes 3 stages: egg,
gradual and complete nymph and adult. there is no pupa stage. complete
metamorphosis? why is it important metamorphosis includes 4 stages: egg, larva, pupa,
to know the life cycle stage of an and adult. insects that develop via complete
insect? metamorphosis change body form. larvae may not
look at all like adults within the same species.it is
very important to recognize the damaging stage
for best treatment results. many insect are pests in
one stage but not another. especially larval form.
what are beneficial insects? and why insects that are pollinators (bees and butterflies) or
are they important to agriculture? pest predators (ladybeetles and lacewings). with
out pollinators many types of plants could not
reproduce and beneficial predators feed on
harmful insects, mites, and weeds.
how do mites harm plants? They suck the plant juices, eat the underside of
leaves, and disfigure the plants they feed on.
what is an economic threshold? the level at which economic losses caused by pest
damage, if the pest population continued to grow,
would be greater than the cost of controlling the
pests. reaching an economic threshold usually
prompts some kind of pest control action.
exam (Newest 2025/2026 Update) 85
Comprehensive Questions & certified Answers |
100% Correct | Grade.
Save
Terms in this set (86)
Explain the difference between key Key pests are nearly always present and require
pests, occasional pests and regular control. occasional pests are migratory or
secondary pests cyclical and require intermittent control. secondary
pests require control only under certain conditions,
such as the elimination of a key pest or the absence
of a natural host.
what should you do first if you see identify the cause
damage to a plant, animal, or
valuable product/
what should you do first if you make sure the pest is actually responsible for the
discover a pest that may need to be damage. then accurately identify the pest
controlled?
how can pest identification help you it allows you to determine basic information about
develop a good pest control the pest, including its life-cycle and when it is most
strategy? susceptible to control measures.
,name the 5 basic pest groups weeds, parasites and diseases, mollusks,
arthropods, and vertebrates.
why do weeds present such a weeds are often hardy, aggressive, and tolerant of
challenge to pest managers? harsh conditions. many produce large numbers of
seeds which can spread over a wide area and
remain dormant for a long time.
how can you tell a monocot from a monocots (sedges and grasses) have one
dicot? cotyledon, parallel leaf veins, flower parts in
multiples of 3 and fibrous roots. Dicots have 2
cotyledons, broad leaves with netted veination,
and flower parts in multiples of 4 and 5 and usually
have taproots.
name the pathogens that cause most fungi, bacteria, mycoplasma, and viruses
plant and animal diseases
what are the symptoms of viral plant stunting, yellow rings on leaves, wilting, and
diseases mosaic patterns
how do plant parasitic nematodes by attacking the roots, stems and leaves. nematode
harm plants? root feeding interferes with a plants ability to take
up water and nutrients. infected plants wilt and
seem to be suffering from a lack of water or
nutrients.
how do mollusks harm plants? by feeding on foliage and fruit. mollusks reduce
the value of commercial produce if they feed on
harvested plants and fruit.
, what are arthropods? how do they arthropods are animals with segmented bodies and
differ from vertebrates? jointed appendages. Arthropods have an external
skeleton and may have specialized appendages
such as sucking tubes, chewing mouth parts,
antennae, and pincers. they have no backbones
like vertebrates
what is the difference between gradual metamorphosis includes 3 stages: egg,
gradual and complete nymph and adult. there is no pupa stage. complete
metamorphosis? why is it important metamorphosis includes 4 stages: egg, larva, pupa,
to know the life cycle stage of an and adult. insects that develop via complete
insect? metamorphosis change body form. larvae may not
look at all like adults within the same species.it is
very important to recognize the damaging stage
for best treatment results. many insect are pests in
one stage but not another. especially larval form.
what are beneficial insects? and why insects that are pollinators (bees and butterflies) or
are they important to agriculture? pest predators (ladybeetles and lacewings). with
out pollinators many types of plants could not
reproduce and beneficial predators feed on
harmful insects, mites, and weeds.
how do mites harm plants? They suck the plant juices, eat the underside of
leaves, and disfigure the plants they feed on.
what is an economic threshold? the level at which economic losses caused by pest
damage, if the pest population continued to grow,
would be greater than the cost of controlling the
pests. reaching an economic threshold usually
prompts some kind of pest control action.
