Illinois Field Crop Applicators Test 2025 UPDATE| COMPREHENSIVE
Illinois Field Crop Applicators Test
QUESTIONS AND VERIFIED ANSWERS (COMPLETE SOLUTIONS)
Study online at https://quizlet.com/_6lygmm
1. various, economi- An integrated pest management program is based upon what factors?
cal, environmentally
sound, socially accept-
able
2. Economic threshhold What is the number of pests that should be controlled to prevent economic
damage from occurring?
3. Economic Injury level Number of pests, costs of various treatments, expected yield, and expect-
ed grain value are all factors to determine....
4. Do not treat, but scout What should be done if scouting detects an important pest, but its num-
again later. bers do not reach the economic threshold?
5. random When scouting, where in the field should you sample?
6. Cultural, Mechanical, What are the 4 types of control measures used in an IPM?
Biological, Chemical
7. Larvae At what stage in the life-cycle of a Corn rootworm does it prune and tunnel
through the roots causing stalk lodging?
8. Adult At what life-cycle stage does a corn rootworm cause ear damage by
feeding on the silks?
9. When silks are green, What are the economic thresholds when scouting for corn rootworm
5 or more beetles beetles in corn?
per plant if silks are
clipped within 1/2 inch
of the ear tip.
10. From late July to late What are the economic thresholds when scouting for corn rootworm
august at least 5 bee- beetles in soy?
tles per unbaited phe-
, Illinois Field Crop Applicators Test
Study online at https://quizlet.com/_6lygmm
rocon AM trap in soy-
beans or .75 beetles
per plant in non-rotat-
ed corn.
11. feed on the leaves and What damage does a black cutworm larvae do to corn seedlings?
older larvae cause leaf
cutting leading to re-
duced stands.
12. Crop debris, winter What are 3 factors that have the most potential to lead to black cutworm
annaul weeds, late damage?
planted
13. rescue treatments What is the recommended method for managing black cutworms in IL?
when nessisary
14. European corn borer What type of larvae causes whorl damage in 1st generation, stalk tunnel-
ing damage in the 2nd generation with possible ear tunneling and stalk
rot?
15. Leaf Aphid Damages corn by coating the tassels and silks with honeydew which
reduces pollination.
16. Japanese beetle grubs What insects have white, C-shaped, and about 1 inch long larvea which
and other white can be differentiated by their raster patterns?
grubs.
17. Japanese beetle grubs 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.
18. Japanese beetle They are metallic looking green beetles that are 3/8 to 1/2 and inch long
adults. with coppery wing covers.
Illinois Field Crop Applicators Test
QUESTIONS AND VERIFIED ANSWERS (COMPLETE SOLUTIONS)
Study online at https://quizlet.com/_6lygmm
1. various, economi- An integrated pest management program is based upon what factors?
cal, environmentally
sound, socially accept-
able
2. Economic threshhold What is the number of pests that should be controlled to prevent economic
damage from occurring?
3. Economic Injury level Number of pests, costs of various treatments, expected yield, and expect-
ed grain value are all factors to determine....
4. Do not treat, but scout What should be done if scouting detects an important pest, but its num-
again later. bers do not reach the economic threshold?
5. random When scouting, where in the field should you sample?
6. Cultural, Mechanical, What are the 4 types of control measures used in an IPM?
Biological, Chemical
7. Larvae At what stage in the life-cycle of a Corn rootworm does it prune and tunnel
through the roots causing stalk lodging?
8. Adult At what life-cycle stage does a corn rootworm cause ear damage by
feeding on the silks?
9. When silks are green, What are the economic thresholds when scouting for corn rootworm
5 or more beetles beetles in corn?
per plant if silks are
clipped within 1/2 inch
of the ear tip.
10. From late July to late What are the economic thresholds when scouting for corn rootworm
august at least 5 bee- beetles in soy?
tles per unbaited phe-
, Illinois Field Crop Applicators Test
Study online at https://quizlet.com/_6lygmm
rocon AM trap in soy-
beans or .75 beetles
per plant in non-rotat-
ed corn.
11. feed on the leaves and What damage does a black cutworm larvae do to corn seedlings?
older larvae cause leaf
cutting leading to re-
duced stands.
12. Crop debris, winter What are 3 factors that have the most potential to lead to black cutworm
annaul weeds, late damage?
planted
13. rescue treatments What is the recommended method for managing black cutworms in IL?
when nessisary
14. European corn borer What type of larvae causes whorl damage in 1st generation, stalk tunnel-
ing damage in the 2nd generation with possible ear tunneling and stalk
rot?
15. Leaf Aphid Damages corn by coating the tassels and silks with honeydew which
reduces pollination.
16. Japanese beetle grubs What insects have white, C-shaped, and about 1 inch long larvea which
and other white can be differentiated by their raster patterns?
grubs.
17. Japanese beetle grubs 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.
18. Japanese beetle They are metallic looking green beetles that are 3/8 to 1/2 and inch long
adults. with coppery wing covers.
