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ILLINOIS FIELD CROP APPLICATORS
TEST QUESTIONS AND ANSWERS 2025
An integrated pest management program is based upon what
factors? - correct answer- various, economical, environmentally
sound, socially acceptable
What is the number of pests that should be controlled to
prevent economic damage from occurring? - correct answer-
Economic threshhold
Number of pests, costs of various treatments, expected yield,
and expected grain value are all factors to determine.... -
correct answer- Economic Injury level
What should be done if scouting detects an important pest, but
its numbers do not reach the economic threshold? - correct
answer- Do not treat, but scout again later.
When scouting, where in the field should you sample? - correct
answer- random
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What are the 4 types of control measures used in an IPM? -
correct answer- Cultural, Mechanical, Biological, Chemical
At what stage in the life-cycle of a Corn rootworm does it prune
and tunnel through the roots causing stalk lodging? - correct
answer- Larvae
At what life-cycle stage does a corn rootworm cause ear
damage by feeding on the silks? - correct answer- Adult
What are the economic thresholds when scouting for corn
rootworm beetles in corn? - correct answer- When silks are
green, 5 or more beetles per plant if silks are clipped within 1/2
inch of the ear tip.
What are the economic thresholds when scouting for corn
rootworm beetles in soy? - correct answer- From late July to
late august at least 5 beetles per unbaited pherocon AM trap in
soybeans or .75 beetles per plant in non-rotated corn.
What damage does a black cutworm larvae do to corn
seedlings? - correct answer- feed on the leaves and older
larvae cause leaf cutting leading to reduced stands.
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What are 3 factors that have the most potential to lead to black
cutworm damage? - correct answer- Crop debris, winter annaul
weeds, late planted
What is the recommended method for managing black
cutworms in IL? - correct answer- rescue treatments when
nessisary
What type of larvae causes whorl damage in 1st generation,
stalk tunneling damage in the 2nd generation with possible ear
tunneling and stalk rot? - correct answer- European corn borer
Damages corn by coating the tassels and silks with honeydew
which reduces pollination. - correct answer- Leaf Aphid
What insects have white, C-shaped, and about 1 inch long
larvea which can be differentiated by their raster patterns? -
correct answer- Japanese beetle grubs and other white grubs.
They chew on the roots and root hairs of seedlings resulting in
irregular emergence, reduced stands, and stunted or wilted
ILLINOIS FIELD CROP APPLICATORS
TEST QUESTIONS AND ANSWERS 2025
An integrated pest management program is based upon what
factors? - correct answer- various, economical, environmentally
sound, socially acceptable
What is the number of pests that should be controlled to
prevent economic damage from occurring? - correct answer-
Economic threshhold
Number of pests, costs of various treatments, expected yield,
and expected grain value are all factors to determine.... -
correct answer- Economic Injury level
What should be done if scouting detects an important pest, but
its numbers do not reach the economic threshold? - correct
answer- Do not treat, but scout again later.
When scouting, where in the field should you sample? - correct
answer- random
,2 | Page
What are the 4 types of control measures used in an IPM? -
correct answer- Cultural, Mechanical, Biological, Chemical
At what stage in the life-cycle of a Corn rootworm does it prune
and tunnel through the roots causing stalk lodging? - correct
answer- Larvae
At what life-cycle stage does a corn rootworm cause ear
damage by feeding on the silks? - correct answer- Adult
What are the economic thresholds when scouting for corn
rootworm beetles in corn? - correct answer- When silks are
green, 5 or more beetles per plant if silks are clipped within 1/2
inch of the ear tip.
What are the economic thresholds when scouting for corn
rootworm beetles in soy? - correct answer- From late July to
late august at least 5 beetles per unbaited pherocon AM trap in
soybeans or .75 beetles per plant in non-rotated corn.
What damage does a black cutworm larvae do to corn
seedlings? - correct answer- feed on the leaves and older
larvae cause leaf cutting leading to reduced stands.
, 3 | Page
What are 3 factors that have the most potential to lead to black
cutworm damage? - correct answer- Crop debris, winter annaul
weeds, late planted
What is the recommended method for managing black
cutworms in IL? - correct answer- rescue treatments when
nessisary
What type of larvae causes whorl damage in 1st generation,
stalk tunneling damage in the 2nd generation with possible ear
tunneling and stalk rot? - correct answer- European corn borer
Damages corn by coating the tassels and silks with honeydew
which reduces pollination. - correct answer- Leaf Aphid
What insects have white, C-shaped, and about 1 inch long
larvea which can be differentiated by their raster patterns? -
correct answer- Japanese beetle grubs and other white grubs.
They chew on the roots and root hairs of seedlings resulting in
irregular emergence, reduced stands, and stunted or wilted
