VIRGINIA COMMERCIAL PESTCIDE APPLICATORS CERTIFICATION
CORE EXAM 2024-2025 NEWEST!!! COMPLETE ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS )
ALREADY GRADED A+.
Explain the difference between key pests, occasional pests and
secondary pests - 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.
what should you do first if you see damage to a plant, animal, or
valuable product/ - ANSWER-identify the cause
what should you do first if you discover a pest that may need to be
controlled? - ANSWER-make sure the pest is actually responsible for
the damage. then accurately identify the pest
how can pest identification help you develop a good pest control
strategy? - ANSWER-it allows you to determine basic information
about the pest, including its life-cycle and when it is most susceptible
to control measures.
name the 5 basic pest groups - ANSWER-weeds, parasites and
diseases, mollusks, arthropods, and vertebrates.
,why do weeds present such a challenge to pest managers? -
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.
how can you tell a monocot from a dicot? - 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.
name the pathogens that cause most plant and animal diseases -
ANSWER-fungi, bacteria, mycoplasma, and viruses
what are the symptoms of viral plant diseases - ANSWER-stunting,
yellow rings on leaves, wilting, and mosaic patterns
how do plant parasitic nematodes harm plants? - 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.
how do mollusks harm plants? - ANSWER-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 differ from vertebrates? -
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
what is the difference between gradual and complete metamorphosis?
why is it important to know the life cycle stage of an insect? -
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 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 are they important to
agriculture? - ANSWER-insects that are pollinators (bees and
butterflies) or 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? - ANSWER-They suck the plant juices, eat
the underside of leaves, and disfigure the plants they feed on.
what is an economic threshold? - ANSWER-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.
how are thresholds important to a sound pest control strategy? -
ANSWER-setting a treatment or action threshold is essential to
prevent the pests in an area from causing unacceptable injury or
harm. action thresholds vary: sometimes one pest is too many (like a
rat in a food processing facility). Thresholds help producers and
applicators weigh the cost of pest control against the cost of a pest
infestation
what is monitoring and how is it important to a sound pest control
strategy? - ANSWER-regular checking or scouting for pests in a
designated area. Monitoring will tell you what pests are in an area,
how many are in the area, and how much damage they are causing. it
will help determine if the pest population has reached the treatment
threshold and whether control measures have worked.
what is the difference between prevention, suppression and
eradication of a pest? - ANSWER-prevention means reducing the
chances that a pest will become a problem. suppression means
reducing pest numbers or damage to an acceptable level. Eradication
means destroying an entire pest population.
how could you prevent a pest infestation? - ANSWER-plant weed- and
disease- free seed, choose plants resistant to diseases and insects,
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