Illinois Field Crop Applicators Test EXAM Questions &
Answers | 100% Verified solutions |Questions with Correct
Answers 2025 latest update!!
Terms in this set (102)
various, economical, An integrated pest management program is based upon what factors?
environmentally sound,
socially acceptable
What is the number of pests that should be controlled to
Economic threshhold
prevent economic damage from occurring?
Number of pests, costs of various treatments, expected yield,
Economic Injury level
and expected grain value are all factors to determine....
What should be done if scouting detects an important pest,
Do not treat, but scout again later.
but its numbers do not reach the economic threshold?
random When scouting, where in the field should you sample?
, Cultural, Mechanical, Biological, What are the 4 types of control measures used in an IPM?
Chemical
At what stage in the life-cycle of a Corn rootworm does it
Larvae
prune and tunnel through the roots causing stalk lodging?
At what life-cycle stage does a corn rootworm cause ear damage
Adult
by feeding on the silks?
When silks are green, 5 or What are the economic thresholds when scouting for corn
more beetles per plant if silks rootworm beetles in corn?
are clipped within 1/2 inch of
the ear tip.
From late July to late august What are the economic thresholds when scouting for corn rootworm
at least 5 beetles per unbaited beetles in soy?
pherocon AM trap in soybeans
or .75 beetles per plant in
non- rotated corn.
feed on the leaves and older What damage does a black cutworm larvae do to corn seedlings?
larvae cause leaf cutting
leading to reduced stands.
Crop debris, winter annaul What are 3 factors that have the most potential to lead to black cutworm
weeds, late planted damage?
rescue treatments when nessisary What is the recommended method for managing black cutworms in IL?
What type of larvae causes whorl damage in 1st generation,
European corn borer
stalk tunneling damage in the 2nd generation with possible
ear tunneling and stalk rot?
Damages corn by coating the tassels and silks with
Leaf Aphid
honeydew which reduces pollination.
Japanese beetle grubs and other What insects have white, C-shaped, and about 1 inch long larvea
white grubs. which can be differentiated by their raster patterns?
They chew on the roots and root hairs of seedlings resulting
Japanese beetle grubs in irregular emergence, reduced stands, and stunted or
wilted plants. Injured plants may turn purple because they
cannot take up phosphorus.
They are metallic looking green beetles that are 3/8 to 1/2 and
Japanese beetle adults.
inch long with coppery wing covers.
feed on the silks What kind of damage do Japanese beetle adults cause?
adult bean leaf beetle. 1/4 inch beetle, black triangle on neck just below the head?
When bean leaf beetles feed on cotyledons and first true
16 or more
leaves what is the amount of beetles per foot of row that is
Answers | 100% Verified solutions |Questions with Correct
Answers 2025 latest update!!
Terms in this set (102)
various, economical, An integrated pest management program is based upon what factors?
environmentally sound,
socially acceptable
What is the number of pests that should be controlled to
Economic threshhold
prevent economic damage from occurring?
Number of pests, costs of various treatments, expected yield,
Economic Injury level
and expected grain value are all factors to determine....
What should be done if scouting detects an important pest,
Do not treat, but scout again later.
but its numbers do not reach the economic threshold?
random When scouting, where in the field should you sample?
, Cultural, Mechanical, Biological, What are the 4 types of control measures used in an IPM?
Chemical
At what stage in the life-cycle of a Corn rootworm does it
Larvae
prune and tunnel through the roots causing stalk lodging?
At what life-cycle stage does a corn rootworm cause ear damage
Adult
by feeding on the silks?
When silks are green, 5 or What are the economic thresholds when scouting for corn
more beetles per plant if silks rootworm beetles in corn?
are clipped within 1/2 inch of
the ear tip.
From late July to late august What are the economic thresholds when scouting for corn rootworm
at least 5 beetles per unbaited beetles in soy?
pherocon AM trap in soybeans
or .75 beetles per plant in
non- rotated corn.
feed on the leaves and older What damage does a black cutworm larvae do to corn seedlings?
larvae cause leaf cutting
leading to reduced stands.
Crop debris, winter annaul What are 3 factors that have the most potential to lead to black cutworm
weeds, late planted damage?
rescue treatments when nessisary What is the recommended method for managing black cutworms in IL?
What type of larvae causes whorl damage in 1st generation,
European corn borer
stalk tunneling damage in the 2nd generation with possible
ear tunneling and stalk rot?
Damages corn by coating the tassels and silks with
Leaf Aphid
honeydew which reduces pollination.
Japanese beetle grubs and other What insects have white, C-shaped, and about 1 inch long larvea
white grubs. which can be differentiated by their raster patterns?
They chew on the roots and root hairs of seedlings resulting
Japanese beetle grubs in irregular emergence, reduced stands, and stunted or
wilted plants. Injured plants may turn purple because they
cannot take up phosphorus.
They are metallic looking green beetles that are 3/8 to 1/2 and
Japanese beetle adults.
inch long with coppery wing covers.
feed on the silks What kind of damage do Japanese beetle adults cause?
adult bean leaf beetle. 1/4 inch beetle, black triangle on neck just below the head?
When bean leaf beetles feed on cotyledons and first true
16 or more
leaves what is the amount of beetles per foot of row that is
