ILLINOIS FIELD CROP APPLICATORS
TEST EXAM QUESTIONS AND
CORRECT ANSWERS. VERIFIED
2025/2026.
Various, economical, environmentally sound, socially acceptable - ANS An integrated pest
management program is based upon what factors?
Economic threshhold - ANS What is the number of pests that should be controlled to prevent
economic damage from occurring?
Economic Injury level - ANS Number of pests, costs of various treatments, expected yield,
and expected grain value are all factors to determine....
Do not treat, but scout again later. - ANS What should be done if scouting detects an
important pest, but its numbers do not reach the economic threshold?
random - ANS When scouting, where in the field should you sample?
Cultural, Mechanical, Biological, Chemical - ANS What are the 4 types of control measures
used in an IPM?
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Larvae - ANS At what stage in the life-cycle of a Corn rootworm does it prune and tunnel
through the roots causing stalk lodging?
Adult - ANS At what life-cycle stage does a corn rootworm cause ear damage by feeding on
the silks?
When silks are green, 5 or more beetles per plant if silks are clipped within 1/2 inch of the ear
tip. - ANS What are the economic thresholds when scouting for corn rootworm beetles in
corn?
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. - ANS What are the economic thresholds when
scouting for corn rootworm beetles in soy?
feed on the leaves and older larvae cause leaf cutting leading to reduced stands. - ANS What
damage does a black cutworm larvae do to corn seedlings?
Crop debris, winter annaul weeds, late planted - ANS What are 3 factors that have the most
potential to lead to black cutworm damage?
rescue treatments when nessisary - ANS What is the recommended method for managing
black cutworms in IL?
European corn borer - ANS What type of larvae causes whorl damage in 1st generation, stalk
tunneling damage in the 2nd generation with possible ear tunneling and stalk rot?
Leaf Aphid - ANS Damages corn by coating the tassels and silks with honeydew which
reduces pollination.
Japanese beetle grubs and other white grubs. - ANS What insects have white, C-shaped, and
about 1 inch long larvea which can be differentiated by their raster patterns?
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
TEST EXAM QUESTIONS AND
CORRECT ANSWERS. VERIFIED
2025/2026.
Various, economical, environmentally sound, socially acceptable - ANS An integrated pest
management program is based upon what factors?
Economic threshhold - ANS What is the number of pests that should be controlled to prevent
economic damage from occurring?
Economic Injury level - ANS Number of pests, costs of various treatments, expected yield,
and expected grain value are all factors to determine....
Do not treat, but scout again later. - ANS What should be done if scouting detects an
important pest, but its numbers do not reach the economic threshold?
random - ANS When scouting, where in the field should you sample?
Cultural, Mechanical, Biological, Chemical - ANS What are the 4 types of control measures
used in an IPM?
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Larvae - ANS At what stage in the life-cycle of a Corn rootworm does it prune and tunnel
through the roots causing stalk lodging?
Adult - ANS At what life-cycle stage does a corn rootworm cause ear damage by feeding on
the silks?
When silks are green, 5 or more beetles per plant if silks are clipped within 1/2 inch of the ear
tip. - ANS What are the economic thresholds when scouting for corn rootworm beetles in
corn?
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. - ANS What are the economic thresholds when
scouting for corn rootworm beetles in soy?
feed on the leaves and older larvae cause leaf cutting leading to reduced stands. - ANS What
damage does a black cutworm larvae do to corn seedlings?
Crop debris, winter annaul weeds, late planted - ANS What are 3 factors that have the most
potential to lead to black cutworm damage?
rescue treatments when nessisary - ANS What is the recommended method for managing
black cutworms in IL?
European corn borer - ANS What type of larvae causes whorl damage in 1st generation, stalk
tunneling damage in the 2nd generation with possible ear tunneling and stalk rot?
Leaf Aphid - ANS Damages corn by coating the tassels and silks with honeydew which
reduces pollination.
Japanese beetle grubs and other white grubs. - ANS What insects have white, C-shaped, and
about 1 inch long larvea which can be differentiated by their raster patterns?
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
