Illinois Field Crop Applicators Test
(100% CORRECT ANSWERS WITH
COMPLETE SOLUTION )
Question :An integrated pest management program is based
upon what factors?
Correct answer:various, economical, environmentally sound,
socially acceptable
Question :What is the number of pests that should be
controlled to prevent economic damage from occurring?
Correct answer:Economic threshhold
Question :Number of pests, costs of various treatments,
expected yield, and expected grain value are all factors to determine....
Correct answer:Economic Injury level
Question :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.
Question :When scouting, where in the field should you
sample?
Correct answer:random
Question :What are the 4 types of control measures used in an
IPM?
Correct answer:Cultural, Mechanical, Biological, Chemical
Question :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
Question :At what life-cycle stage does a corn rootworm
cause ear damage by feeding on the silks?
Correct answer:Adult
Question :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.
Question :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.
Question :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.
Question :What are 3 factors that have the most potential to
lead to black cutworm damage?
Correct answer:Crop debris, winter annaul weeds, late planted
Question :What is the recommended method for managing
black cutworms in IL?
Correct answer:rescue treatments when nessisary
Question :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
Question :Damages corn by coating the tassels and silks with
honeydew which reduces pollination.
Correct answer:Leaf Aphid
Question :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.
Question :They chew on the roots and root hairs of seedlings
resulting in irregular emergence, reduced stands, and stunted