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MDARD ORNAMENTAL PEST MANAGEMENT (3D) EXAM QUESTIONS AND ANSWERS MICHIGAN UNIVERSITY
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MDARD ORNAMENTAL PEST MANAGEMENT (3D) EXAM QUESTIONS AND ANSWERS MICHIGAN UNIVERSITY
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MDARD ORNAMENTAL PESTMANAGEMENT (3D) EXAM QUESTIONS
AND ANSWERS MICHIGAN UNIVERSITY
What is a favorite food plant of slugs?
✔✔Thin leaved hosts
Why must you understand the developmental stages of insects and mites to
adequately control them? Give an example.
✔✔It is necessary to know what stage an insect is into apply the best tactic.
Some insecticides will control adult Japanese beetles but won't do anything
against the grub form. Other insecticides will only affect the grub form and
not the adult. It is important to know what stage the insect is in and what life
stage the pesticide is effective.
Insects that have a pupal stage undergo
✔✔Complete metamorphosis.
Which statement about mites is true?
✔✔They develop by gradual metamorphosis from egg to nymph to adult
Predator
✔✔Insects that actively seek out and attack their prey
Pathogen
✔✔A disease causing agent.
,Parasitoid
✔✔Paralyze the host, and then lay eggs on it that will eventually provide
food for the larvae.
Parasite
✔✔Enter the body of the host to complete their development
How do horticultural oils and insecticidal soaps work to control pests?
✔✔They coat the insect and disrupt its ability to retain moisture.
They also can enter through openings on the insects body to attack its
internal tissues.
Honeylocust plant bug
✔✔Adults are pale green and oval.
Overwinter under bark as eggs.
Feed from late April to mid-May.
The leaves of infested plants become distorted and stunted from feeding
injury by nymphs and adults.
Potato leafhopper
✔✔Adults are pale green and wedge-shaped with white eyes.
Nymphs are smaller with no wings, are found on the underside of foliage,
cause white stippling of leaves and stunted, curled shoots that are brown at
the tips.
,Flower thrips
✔✔Small, slender insects with fringed wings.
Can be carried great distances by the wind.
They feed by piercing the leaf or petal surface and sucking sap from injured
cells.
Susceptible to pesticides, but can be so plentiful there is no use. Lacewing
larvae and predatory mites are good biological agents.
Cottony maple scale
✔✔Females are oval, flattened and dark brown.
Can be found on twigs.
A fluffy white sac appears when eggs have been produced.
Heavy feeding causes dieback of twigs and branches.
Lady bugs, lacewings, parasitic wasps, and flies are good biological control
agents.
Soaps and oils can be used on crawler stage.
Aphids
✔✔Slow moving, soft bodied insects with "tailpipes" that include many
different species.
They inject saliva into plants as they feed.
Some may transmit viruses.
Lady bugs and lacewings are good biological control agents.
, Sycamore lace bug
✔✔Small, with highly ornamented white, lacy, wings.
Black eggs can be found in clusters on the underside of leaves.
Feeding causes whitish or yellowish stippling on the foliage.
Pirate bugs and spiders are natural enemies.
Insecticidal soap, horticultural oil, or contact insecticides may be applied to
undersides of leaves.
Oystershell scale
✔✔Brown to grayish and form a crust on the bark of susceptible hosts.
Crawlers and eggs are white.
No honeydew is produced.
Symptoms include dieback of branches and twigs, yellowed or undersized
foliage.
Two-spotted spider mite
✔✔Adults are oval and greenish yellow with eight legs.
Can generally be seen with a hand lens.
As they feed a dark spot on each side of the body develops, and infested
plants take on a bronzed or stippled appearance.
Horticultural oils and insecticidal soaps control spider mites and conserve
natural predators.
What is the correct way to manage oystershell scale?
✔✔Treat crawlers with horticultural oils.
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