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VIRGINIA COMMERCIAL PESTICIDE
APPLICATORS CORE EXA M |
QUESTIONS WITH 100% CORRECT
ANSWERS | VERIFIED | LATEST
UPDATE
Question :Explain the difference between key pests,
occasional pests and secondary pests
Correct answer:Key pests are nearly always present and
require regular control. occasional pests are migratory or 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.
Question :what should you do first if you see damage to a
plant, animal, or valuable product/
Correct answer:identify the cause
Question :what should you do first if you discover a pest that
may need to be controlled?
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Correct answer:make sure the pest is actually responsible for
the damage. then accurately identify the pest
Question :how can pest identification help you develop a good
pest control strategy?
Correct answer:it allows you to determine basic information
about the pest, including its life-cycle and when it is most susceptible to control measures.
Question :name the 5 basic pest groups
Correct answer:weeds, parasites and diseases, mollusks,
arthropods, and vertebrates.
Question :why do weeds present such a challenge to pest
managers?
Correct answer:weeds are often hardy, aggressive, and
tolerant of harsh conditions. many produce large numbers of seeds which can spread over a wide area and remain dormant for a long time.
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Question :how can you tell a monocot from a dicot?
Correct answer:monocots (sedges and grasses) have one
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.
Question :name the pathogens that cause most plant and
animal diseases
Correct answer:fungi, bacteria, mycoplasma, and viruses
Question :what are the symptoms of viral plant diseases
Correct answer:stunting, yellow rings on leaves, wilting, and
mosaic patterns
Question :how do plant parasitic nematodes harm plants?
Correct answer:by attacking the roots, stems and leaves.
nematode 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.
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Question :how do mollusks harm plants?
Correct answer:by feeding on foliage and fruit. mollusks
reduce the value of commercial produce if they feed on harvested plants and fruit.
Question :what are arthropods? how do they differ from
vertebrates?
Correct answer:arthropods are animals with segmented bodies
and 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
Question :what is the difference between gradual and
complete metamorphosis? why is it important to know the life cycle stage of an insect?Correct answer:gradual metamorphosis includes 3 stages: egg, nymph and adult. there is no pupa stage. complete
metamorphosis includes 4 stages: egg, larva, pupa, and adult.
insects that develop via complete metamorphosis change body