Illinois Field Crop Applicators
Comprehensive Resource To Help You Ace 2026-2027 Exams
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. An integrated pest management program is based upon what factors? -
Correct Answer: various, economical, environmentally sound, socially
acceptable
2. What is the number of pests that should be controlled to prevent economic
damage from occurring? - Correct Answer: Economic threshhold
3. Number of pests, costs of various treatments, expected yield, and expected
grain value are all factors to determine.... - Correct Answer: Economic
Injury level
4. 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.
5. When scouting, where in the field should you sample? - Correct
Answer: random
,6. What are the 4 types of control measures used in an IPM? - Correct
Answer: Cultural, Mechanical, Biological, Chemical
7. 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
8. At what life-cycle stage does a corn rootworm cause ear damage by feeding
on the silks? - Correct Answer: Adult
9. 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.
10.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.
11.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.
12.What are 3 factors that have the most potential to lead to black cutworm
damage? - Correct Answer: Crop debris, winter annaul weeds, late
planted
,13.What is the recommended method for managing black cutworms in IL? -
Correct Answer: rescue treatments when nessisary
14.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
15.Damages corn by coating the tassels and silks with honeydew which
reduces pollination. - Correct Answer: Leaf Aphid
16.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.
17.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. - Correct
Answer: Japanese beetle grubs
18.They are metallic looking green beetles that are 3/8 to 1/2 and inch long
with coppery wing covers. - Correct Answer: Japanese beetle adults.
19.What kind of damage do Japanese beetle adults cause? - Correct
Answer: feed on the silks
, 20.1/4 inch beetle, black triangle on neck just below the head? - Correct
Answer: adult bean leaf beetle.
21.When bean leaf beetles feed on cotyledons and first true leaves what is the
amount of beetles per foot of row that is the economic threshold? -
Correct Answer: 16 or more
22.When bean leaf beetles eat holes in leaves during the vegetative growth
stage what is the percent defoliation that is the economic threshold? -
Correct Answer: 30-40%
23.when bean leaf beetles feed during pod fill what is the percentage of
defoliation or damaged pods that is the economic threshold? - Correct
Answer: 20% defoliation or 5-10% injured pods
24.pinhead sized, yellow, round, soft bodied, insects on the undersides of
soybean leaves - Correct Answer: soybean aphids
25.What pest causes the following damage: suck sap from sobean plants
causing the leaves to curl and turn yellow, excrete honeydew, sooty mold
grows on the honeydew lowering photosynthesis, heavy infestations cause
lowers pod counts, and they act as a vector for pathogens. - Correct
Answer: soybean aphids
26.What pest causes the following damage: Stripping leaves, fine silk on leaves
and between plants, bronzing leaves, curled leaves and leaf drop. -
Correct Answer: spider mites
Comprehensive Resource To Help You Ace 2026-2027 Exams
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. An integrated pest management program is based upon what factors? -
Correct Answer: various, economical, environmentally sound, socially
acceptable
2. What is the number of pests that should be controlled to prevent economic
damage from occurring? - Correct Answer: Economic threshhold
3. Number of pests, costs of various treatments, expected yield, and expected
grain value are all factors to determine.... - Correct Answer: Economic
Injury level
4. 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.
5. When scouting, where in the field should you sample? - Correct
Answer: random
,6. What are the 4 types of control measures used in an IPM? - Correct
Answer: Cultural, Mechanical, Biological, Chemical
7. 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
8. At what life-cycle stage does a corn rootworm cause ear damage by feeding
on the silks? - Correct Answer: Adult
9. 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.
10.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.
11.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.
12.What are 3 factors that have the most potential to lead to black cutworm
damage? - Correct Answer: Crop debris, winter annaul weeds, late
planted
,13.What is the recommended method for managing black cutworms in IL? -
Correct Answer: rescue treatments when nessisary
14.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
15.Damages corn by coating the tassels and silks with honeydew which
reduces pollination. - Correct Answer: Leaf Aphid
16.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.
17.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. - Correct
Answer: Japanese beetle grubs
18.They are metallic looking green beetles that are 3/8 to 1/2 and inch long
with coppery wing covers. - Correct Answer: Japanese beetle adults.
19.What kind of damage do Japanese beetle adults cause? - Correct
Answer: feed on the silks
, 20.1/4 inch beetle, black triangle on neck just below the head? - Correct
Answer: adult bean leaf beetle.
21.When bean leaf beetles feed on cotyledons and first true leaves what is the
amount of beetles per foot of row that is the economic threshold? -
Correct Answer: 16 or more
22.When bean leaf beetles eat holes in leaves during the vegetative growth
stage what is the percent defoliation that is the economic threshold? -
Correct Answer: 30-40%
23.when bean leaf beetles feed during pod fill what is the percentage of
defoliation or damaged pods that is the economic threshold? - Correct
Answer: 20% defoliation or 5-10% injured pods
24.pinhead sized, yellow, round, soft bodied, insects on the undersides of
soybean leaves - Correct Answer: soybean aphids
25.What pest causes the following damage: suck sap from sobean plants
causing the leaves to curl and turn yellow, excrete honeydew, sooty mold
grows on the honeydew lowering photosynthesis, heavy infestations cause
lowers pod counts, and they act as a vector for pathogens. - Correct
Answer: soybean aphids
26.What pest causes the following damage: Stripping leaves, fine silk on leaves
and between plants, bronzing leaves, curled leaves and leaf drop. -
Correct Answer: spider mites
