PCA INSECTS 321 EXAM QUESTIONS AND ANSWERS UPDATED
2026 VERIFIED ANSWERS ACTUAL UPDATED PRACTICE
QUESTIONS TEST BANK HIGH YIELD STUDY GUIDE GRADED A+
COMPREHENSIVE EXAM PREPARATION PASSING GUARANTEE
SUCCESS
321 exam questions and answers
Pheromone mating disruption is used in management programs in California to
control? - CORRECT ANSWER-codling moth
How do piercing sucking mouthparts differ from other types of mouthparts? -
CORRECT ANSWER-mandible and maxillae are modified into stylets
Which type of insect is most often killed when it feeds on plants treated with
pesticides? - CORRECT ANSWER-leafhoppers
Transgenic plants for control of arthropod pests have been developed? -
CORRECT ANSWER-Bacillus thuringiensis
As originally devised, the main objective of the sterile insect technique is? -
CORRECT ANSWER-eradication
Which insect mortality factor is sometimes density-dependent? - CORRECT
ANSWER-action of natural enemies
Which of these insects is an example of a predator? - CORRECT
ANSWER-ichneumon wasp
Most adult slugs and snails feed on which of these? - CORRECT
ANSWER-both living and dead plant matter
,Which of these outcomes can be reduced by harvesting alfalfa hay a few days
early? - CORRECT ANSWER-presence of virus vectoring aphids
Stippling is most common with insects that have? - CORRECT ANSWER-
piercing sucking mouthparts
An insects exoskeleton protects it against? - CORRECT ANSWER-
desiccation
The body regions of a spider include the? - CORRECT ANSWER-abdomen
and cephalothorax
Which statement best describes the difference between wing development in
nymphs and larvae? - CORRECT ANSWER-wings develop outside the
body of nymphs while inside the body of larvae
Which environment is most limiting when natural enemies are being
introduced? - CORRECT ANSWER-annual row crops
Larvae of which pest penetrate into apples and pears, tunneling to the Core and
leaving holes filled with reddish brown, crumbly frass? - CORRECT
ANSWER-codling moth
The feeding damage and webbing on these apricots was most likely caused by?
- CORRECT ANSWER-European earwig
Reproduction in the absence of male gamete is called? - CORRECT
ANSWER-parthenogenesis
,In what way do parasitoids differ from predators? - CORRECT ANSWER-
Parasitoids live on or within their hosts while immature, and predators are
always free living
The control of Cottony cushion scale by the vedalia beetle is an example of
which type of control? - CORRECT ANSWER-Classical Biological Control
Which insect undergoes complete metamorphosis? - CORRECT ANSWER-
Butterflies, flies, beetles, bees, wasps, ants, and fleas
What insects can reproduce asexually? - CORRECT ANSWER-Stick
insects (Phasmatodea), Soybean aphids, water fleas (Daphnia sp.), and
nematodes
Which of these pests has gradual metamorphosis? - CORRECT ANSWER-
termites
During which stage are plants least able to compensate for injury caused by
insect pests? - CORRECT ANSWER-when fruit is forming
What group of arthropods is often controlled with baits? - CORRECT
ANSWER-slugs
Why does the development rate of insects increase when the temperature
increases within their species-specific threshold? - CORRECT ANSWER-
chemical reaction occur more frequently and proceed more rapidly at higher
temperatures
, Which of these techniques can be used to minimize secondary pest outbreaks? -
CORRECT ANSWER-applying a selective insecticide
Which application technique conserves natural enemies most effectively? -
CORRECT ANSWER-spot treatments
When might a cotton grower expect a major influx of lygus bugs into his crops?
- CORRECT ANSWER-after harvesting Alfalfa in nearby fields
Which statement describes the challenge of sampling insects that are clumped in
a field? - CORRECT ANSWER-absolute sampling is the only method of
determining population densities
When dense populations of an insect species are found only in a few areas of a
field, their population distribution is best described as? - CORRECT
ANSWER-clumped
Which of these characteristics makes an insecticide most likely to enter surface
drinking water supplies? - CORRECT ANSWER-persistence
Which statement describes a distinguishing characteristic of lygus bugs? -
CORRECT ANSWER-Immatures are pale green and have five black spots
Which component of a beetles mouthparts enables it to bite off and chew
pieces? - CORRECT ANSWER-mandible
Which weevil chews longitudinal scars on leaves as an adult? - CORRECT
ANSWER-rice water weevil
2026 VERIFIED ANSWERS ACTUAL UPDATED PRACTICE
QUESTIONS TEST BANK HIGH YIELD STUDY GUIDE GRADED A+
COMPREHENSIVE EXAM PREPARATION PASSING GUARANTEE
SUCCESS
321 exam questions and answers
Pheromone mating disruption is used in management programs in California to
control? - CORRECT ANSWER-codling moth
How do piercing sucking mouthparts differ from other types of mouthparts? -
CORRECT ANSWER-mandible and maxillae are modified into stylets
Which type of insect is most often killed when it feeds on plants treated with
pesticides? - CORRECT ANSWER-leafhoppers
Transgenic plants for control of arthropod pests have been developed? -
CORRECT ANSWER-Bacillus thuringiensis
As originally devised, the main objective of the sterile insect technique is? -
CORRECT ANSWER-eradication
Which insect mortality factor is sometimes density-dependent? - CORRECT
ANSWER-action of natural enemies
Which of these insects is an example of a predator? - CORRECT
ANSWER-ichneumon wasp
Most adult slugs and snails feed on which of these? - CORRECT
ANSWER-both living and dead plant matter
,Which of these outcomes can be reduced by harvesting alfalfa hay a few days
early? - CORRECT ANSWER-presence of virus vectoring aphids
Stippling is most common with insects that have? - CORRECT ANSWER-
piercing sucking mouthparts
An insects exoskeleton protects it against? - CORRECT ANSWER-
desiccation
The body regions of a spider include the? - CORRECT ANSWER-abdomen
and cephalothorax
Which statement best describes the difference between wing development in
nymphs and larvae? - CORRECT ANSWER-wings develop outside the
body of nymphs while inside the body of larvae
Which environment is most limiting when natural enemies are being
introduced? - CORRECT ANSWER-annual row crops
Larvae of which pest penetrate into apples and pears, tunneling to the Core and
leaving holes filled with reddish brown, crumbly frass? - CORRECT
ANSWER-codling moth
The feeding damage and webbing on these apricots was most likely caused by?
- CORRECT ANSWER-European earwig
Reproduction in the absence of male gamete is called? - CORRECT
ANSWER-parthenogenesis
,In what way do parasitoids differ from predators? - CORRECT ANSWER-
Parasitoids live on or within their hosts while immature, and predators are
always free living
The control of Cottony cushion scale by the vedalia beetle is an example of
which type of control? - CORRECT ANSWER-Classical Biological Control
Which insect undergoes complete metamorphosis? - CORRECT ANSWER-
Butterflies, flies, beetles, bees, wasps, ants, and fleas
What insects can reproduce asexually? - CORRECT ANSWER-Stick
insects (Phasmatodea), Soybean aphids, water fleas (Daphnia sp.), and
nematodes
Which of these pests has gradual metamorphosis? - CORRECT ANSWER-
termites
During which stage are plants least able to compensate for injury caused by
insect pests? - CORRECT ANSWER-when fruit is forming
What group of arthropods is often controlled with baits? - CORRECT
ANSWER-slugs
Why does the development rate of insects increase when the temperature
increases within their species-specific threshold? - CORRECT ANSWER-
chemical reaction occur more frequently and proceed more rapidly at higher
temperatures
, Which of these techniques can be used to minimize secondary pest outbreaks? -
CORRECT ANSWER-applying a selective insecticide
Which application technique conserves natural enemies most effectively? -
CORRECT ANSWER-spot treatments
When might a cotton grower expect a major influx of lygus bugs into his crops?
- CORRECT ANSWER-after harvesting Alfalfa in nearby fields
Which statement describes the challenge of sampling insects that are clumped in
a field? - CORRECT ANSWER-absolute sampling is the only method of
determining population densities
When dense populations of an insect species are found only in a few areas of a
field, their population distribution is best described as? - CORRECT
ANSWER-clumped
Which of these characteristics makes an insecticide most likely to enter surface
drinking water supplies? - CORRECT ANSWER-persistence
Which statement describes a distinguishing characteristic of lygus bugs? -
CORRECT ANSWER-Immatures are pale green and have five black spots
Which component of a beetles mouthparts enables it to bite off and chew
pieces? - CORRECT ANSWER-mandible
Which weevil chews longitudinal scars on leaves as an adult? - CORRECT
ANSWER-rice water weevil
