ILLINOIS FIELD CROP APPLICATORS TEST 2026
EXAM PREP SCRIPT FULL QUESTION SET
APPROVED
◉ Economic threshhold. Answer: What is the number of pests that
should be controlled to prevent economic damage from occurring?
◉ Economic Injury level. Answer: 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.. Answer: What should be done
if scouting detects an important pest, but its numbers do not reach
the economic threshold?
◉ random. Answer: When scouting, where in the field should you
sample?
◉ Cultural, Mechanical, Biological, Chemical. Answer: What are the 4
types of control measures used in an IPM?
◉ Larvae. Answer: At what stage in the life-cycle of a Corn rootworm
does it prune and tunnel through the roots causing stalk lodging?
,◉ Adult. Answer: 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.. Answer: 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.. Answer: 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.. Answer: What damage does a black cutworm larvae
do to corn seedlings?
◉ Crop debris, winter annaul weeds, late planted. Answer: What are
3 factors that have the most potential to lead to black cutworm
damage?
◉ rescue treatments when nessisary. Answer: What is the
recommended method for managing black cutworms in IL?
, ◉ European corn borer. Answer: 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. Answer: Damages corn by coating the tassels and silks
with honeydew which reduces pollination.
◉ Japanese beetle grubs and other white grubs.. Answer: What
insects have white, C-shaped, and about 1 inch long larvea which can
be differentiated by their raster patterns?
◉ Japanese beetle grubs. Answer: They chew on the roots and root
hairs of seedlings resulting in irregular emergence, reduced stands,
and stunted or wilted plants. Injured plants may turn purple
because they cannot take up phosphorus.
◉ Japanese beetle adults.. Answer: They are metallic looking green
beetles that are 3/8 to 1/2 and inch long with coppery wing covers.
◉ feed on the silks. Answer: What kind of damage do Japanese
beetle adults cause?
◉ adult bean leaf beetle.. Answer: 1/4 inch beetle, black triangle on
neck just below the head?
EXAM PREP SCRIPT FULL QUESTION SET
APPROVED
◉ Economic threshhold. Answer: What is the number of pests that
should be controlled to prevent economic damage from occurring?
◉ Economic Injury level. Answer: 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.. Answer: What should be done
if scouting detects an important pest, but its numbers do not reach
the economic threshold?
◉ random. Answer: When scouting, where in the field should you
sample?
◉ Cultural, Mechanical, Biological, Chemical. Answer: What are the 4
types of control measures used in an IPM?
◉ Larvae. Answer: At what stage in the life-cycle of a Corn rootworm
does it prune and tunnel through the roots causing stalk lodging?
,◉ Adult. Answer: 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.. Answer: 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.. Answer: 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.. Answer: What damage does a black cutworm larvae
do to corn seedlings?
◉ Crop debris, winter annaul weeds, late planted. Answer: What are
3 factors that have the most potential to lead to black cutworm
damage?
◉ rescue treatments when nessisary. Answer: What is the
recommended method for managing black cutworms in IL?
, ◉ European corn borer. Answer: 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. Answer: Damages corn by coating the tassels and silks
with honeydew which reduces pollination.
◉ Japanese beetle grubs and other white grubs.. Answer: What
insects have white, C-shaped, and about 1 inch long larvea which can
be differentiated by their raster patterns?
◉ Japanese beetle grubs. Answer: They chew on the roots and root
hairs of seedlings resulting in irregular emergence, reduced stands,
and stunted or wilted plants. Injured plants may turn purple
because they cannot take up phosphorus.
◉ Japanese beetle adults.. Answer: They are metallic looking green
beetles that are 3/8 to 1/2 and inch long with coppery wing covers.
◉ feed on the silks. Answer: What kind of damage do Japanese
beetle adults cause?
◉ adult bean leaf beetle.. Answer: 1/4 inch beetle, black triangle on
neck just below the head?
